Novel compounds

Abstract

The present invention provides compounds of Formula (I) and pharmaceutically acceptable salts, solvates and prodrugs thereof, wherein R1, R2, R3, R4, X1, X2, X3, X4, Q1, A1, A2, A3, A4, A5 and A6 are as defined in the specification, and antibody-drug conjugates (ADCs) comprising the compounds. The present invention also relates to processes for the preparation of the compounds and ADCs, pharmaceutical compositions containing them and their use in therapy, particularly for use in treating cancers.

Description

[0001] Novel Compounds

[0002] Field of the Invention

[0003] The present invention relates to fused tetracyclic heteroaromatic compounds and antibody-drug conjugates (ADCs) comprising the compounds. The present invention also relates to processes for the preparation of the compounds and ADCs, and to pharmaceutical compositions containing them and their use in therapy, particularly for use in treating cancers.

[0004] Background of the Invention

[0005] Small molecules that interact with genomic DNA have a long history of use in cancer chemotherapy (e.g. cisplatin family and anthracyclines).1Such molecules target DNA indiscriminately and display broad toxicity in patients owing to their lack of molecular and biological specificity. Despite adverse toxicity, these drugs are still widely deployed in the clinic.2

[0006] G-quadruplexes (G4s) are four-stranded, non-canonical nucleic acid secondary structures which can form in guanine-rich DNA and RNA sequences. In the human genome, there are over 700,000 G4 forming sequences.3-5These G4 motifs are particularly enriched at repetitive elements of the genome, e.g. telomeres, and at gene regulatory regions of protein-coding genes including many oncogenes.

[0007] Folded DNA and RNA G4s have been visualized in human cells and tissues,6-8mapped in human chromatin and the human transcripome,9-12and overall been found to be more abundant in cancer-like cells and tissues7-9.

[0008] G4s have been implicated in several key genome functions such as transcription, replication, translation, telomere maintenance and epigenetic regulation.13Many G4s are likely transient and readily resolved by helicases14. Unresolved DNA G4s can impede DNA polymerases causing DNA damage and requiring homologous recombination (HR) repair15-16.

[0009] Some compounds, named G4 ligands (G4L), have been shown to interact with and stabilise G4s in vitro and in human chromatin17-19. Given the involvement of G4s in various pivotal cellular functions and the connection to cancer biology, G4Ls have been explored as therapeutic agents and shown antiproliferative and chemosensitizing effects against cancer cell lines and tumour models18-20-22. In cancer cells, DNA G4 stabilization may interfere with replication and transcription, affect epigenetic modifications, promote DNA damage, affect the biogenesis and interactions of coding and non-coding RIMA or impair telomerase and thereby inhibit tumour growth.18'23Different G4L chemotypes have been described to mediate genome-wide perturbations, target a subset of G4 topologies and particular G4s in certain oncogenes.18

[0010] Cancer cells often display higher sensitivity to G4L treatment than non-cancerous cells in accordance with the higher occurrence of folded G4s in the chromatin of cancer cell lines and tissues9-22. In addition, some G4Ls are synthetic lethal with loss of various cellular functions24, in particular DNA damage repair25-28, suggesting a biomarker- driven therapeutic approach as well as combination treatment with other agents.

[0011] Some G4Ls have shown activity in HR-deficient cells and tumour models that were resistant to PARP inhibitor treatment as well as gemcitabine-resistant pancreatic cancer cells, indicating that some G4Ls may be used to target difficult to treat certain tumours with acquired resistances.25-29'30

[0012] The G4L CX-5461 entered clinical trials for solid tumours with HR-deficiency mutations (NCT02719977)26. An observed reversion of BRCA2 and PALB2 confirmed the mechanism of action. The molecule was overall well tolerated, but displayed doselimiting phototoxicity.26Similarly, photosensitivity had been observed in a previous clinical trial of CX-5461 in patients with hematologic malignancies.31

[0013] There is a need to provide compounds with improved pharmacological and / or physiological and / or physicochemical properties and / or those that provide a useful alternative to CX-5461.

[0014] Summary of the Invention

[0015] A first aspect of the invention provides a compound of Formula (I):

[0016] Formula (I) wherein : R1and R2are each independently selected from hydrogen or a C1-C12 saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight- chained or branched, or be or include one or more cyclic groups, wherein the hydrocarbyl group may optionally be substituted with one or more halo and / or -NO2 groups, wherein the hydrocarbyl group may optionally include one or more heteroatoms each independently selected from N, O and S in its carbon skeleton, and wherein any -S- moiety in the hydrocarbyl group may optionally be substituted with one or two groups each independently selected from oxo (=0) and =NH to form a -SO-, -SO2-, -S(=NH)- or -SO( = NH)- moiety; or R1and R2together with the nitrogen atom to which they are attached form a 3- to 12-membered cyclic group, wherein the cyclic group may optionally be substituted with one or more substituents each independently selected from a halo, oxo (=0), -OH, -SH, -NH2, -SO2H, -SO3H, -SO2NH2, -NO2, or a C1-C6 saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight- chained or branched, or be or include a cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more halo and / or -NO2 groups, wherein the hydrocarbyl group may optionally include one or more heteroatoms each independently selected from N, O and S in its carbon skeleton, and wherein any -S- moiety in the hydrocarbyl group may optionally be substituted with one or two groups each independently selected from oxo (=0) and =NH to form a -SO-, -SO2-, -S(=NH)- or -SO( = NH)- moiety;

[0017] R3and R4are each independently selected from hydrogen or a C1-C12 saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight- chained or branched, or be or include one or more cyclic groups, wherein the hydrocarbyl group may optionally be substituted with one or more halo and / or -NO2 groups, wherein the hydrocarbyl group may optionally include one or more heteroatoms each independently selected from N, O and S in its carbon skeleton, and wherein any -S- moiety in the hydrocarbyl group may optionally be substituted with one or two groups each independently selected from oxo (=0) and =NH to form a -SO-, -SO2-, -S(=NH)- or -SO( = NH)- moiety; or R3and R4together with the nitrogen atom to which they are attached form a 3- to 12-membered cyclic group, wherein the cyclic group may optionally be substituted with one or more substituents each independently selected from a halo, oxo (=0), -OH, -SH, -NH2, -SO2H, -SO3H, -SO2NH2, -NO2, or a C1-C6 saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight- chained or branched, or be or include a cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more halo and / or -NO2 groups, wherein the hydrocarbyl group may optionally include one or more heteroatoms each independently selected from N, O and S in its carbon skeleton, and wherein any -S- moiety in the hydrocarbyl group may optionally be substituted with one or two groups each independently selected from oxo (=0) and =NH to form a -SO-, -SO2-, -S(=NH)- or -SO( = NH)- moiety; or R3and R4together with the nitrogen atom to which they are attached form a -NO2 group;

[0018] X1is N, C-H, C-Hal or C-RX1;

[0019] X2is N, C-H, C-Hal or C-RX2;

[0020] X3is N, C-H, C-Hal or C-RX3; and

[0021] X4is N or C; provided that no more than three of X1, X2, X3and X4are N;

[0022] RX1, RX2and RX3are each independently selected from -OH, -SH, -NH2, -SO2H, -SO3H, -SO2NH2, -NO2, or a C1-C4 saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more halo and / or -NO2 groups, wherein the hydrocarbyl group may optionally include one or more heteroatoms each independently selected from N, O and S in its carbon skeleton, and wherein any -S- moiety in the hydrocarbyl group may optionally be substituted with one or two groups each independently selected from oxo ( = 0) and = NH to form a -SO-, -SO2-, -S(=NH)- or -SO( = NH)- moiety;

[0023] Q1is O, S, N, N-H, N-RQ1, C-H, C-Hal, or C-R^2;

[0024] RQ1is selected from a C1-C4 saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more halo and / or -NO2 groups, wherein the hydrocarbyl group may optionally include one or more heteroatoms each independently selected from N, O and S in its carbon skeleton, and wherein any -S- moiety in the hydrocarbyl group may optionally be substituted with one or two groups each independently selected from oxo (=0) and = NH to form a -SO-, -SO2-, -S(=NH)- or -SO( = NH)- moiety, provided that the atom of RQ1that is directly attached to the nitrogen atom of N-RQ1is a carbon atom;

[0025] RQ2isselected from -OH, -SH, -NH2, -SO2H, -SO3H, -SO2NH2, -NO2, or a C1-C4 saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more halo and / or -NO2 groups, wherein the hydrocarbyl group may optionally include one or more heteroatoms each independently selected from N, O and S in its carbon skeleton, and wherein any -S- moiety in the hydrocarbyl group may optionally be substituted with one or two groups each independently selected from oxo (=0) and =NH to form a -SO-, -SO2-, -S(=NH)- or -SO( = NH)- moiety;

[0026] A1is N, C-H, C-Hal or C-RA1;

[0027] A2is N, C-H, C-Hal or C-RA2;

[0028] A3is N, C-H, C-Hal or C-RA3;

[0029] A4is N, C-H, C-Hal or C-RA4; and

[0030] A5is N or C; provided that no more than three of A1, A2, A3, A4and A5are N;

[0031] RA1, RA2, RA3and RA4are each independently selected from -OH, -SH, -NH2, -SO2H, -SO3H, -SO2NH2, -NO2, or a C1-C4 saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more halo and / or -NO2 groups, wherein the hydrocarbyl group may optionally include one or more heteroatoms each independently selected from N, O and S in its carbon skeleton, and wherein any -S- moiety in the hydrocarbyl group may optionally be substituted with one or two groups each independently selected from oxo (=0) and = NH to form a -SO-, -SO2-, -S(=NH)- or -SO( = NH)- moiety;

[0032] A6is N or C; and each Hal is independently selected from a fluoro, chloro, bromo or iodo group.

[0033] As will be understood, and as indicated by the circles, each of the four rings in the fused tetracyclic ring system of Formula (I) is aromatic. In other words, X1, X2, X3, X4, A1, A2, A3, A4, A5, A6and Q1are selected such that each ring of the fused tetracyclic ring system of Formula (I) is aromatic.

[0034] In the context of the present specification, a "hydrocarbyl" substituent group or a hydrocarbyl moiety in a substituent group only includes carbon and hydrogen atoms but, unless stated otherwise, does not include any heteroatoms, such as N, O or S, in its carbon skeleton. A hydrocarbyl group / moiety may be saturated or unsaturated (including aromatic), and may be straight-chained or branched, or be or include cyclic groups wherein, unless stated otherwise, the cyclic group does not include any heteroatoms, such as N, O or S, in its carbon skeleton. Examples of hydrocarbyl groups include alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl and aryl groups / moieties and combinations of all of these groups / moieties. Typically a hydrocarbyl group is a C1-C20 hydrocarbyl group. More typically a hydrocarbyl group is a C1-C15 hydrocarbyl group. More typically a hydrocarbyl group is a C1-C10 hydrocarbyl group. A "hydrocarbylene" group is similarly defined as a divalent hydrocarbyl group. An "alkyl" substituent group or an alkyl moiety in a substituent group may be linear (i.e. straight-chained) or branched. Examples of alkyl groups / moieties include methyl, ethyl, n-propyl, / -propyl, n-butyl, / -butyl, t-butyl and n-pentyl groups / moieties. Unless stated otherwise, the term "alkyl" does not include "cycloalkyl". Typically an alkyl group is a C1-C12 alkyl group. More typically an alkyl group is a C1-C6 alkyl group. An "alkylene" group is similarly defined as a divalent alkyl group.

[0035] An "alkenyl" substituent group or an alkenyl moiety in a substituent group refers to an unsaturated alkyl group or moiety having one or more carbon-carbon double bonds. Examples of alkenyl groups / moieties include ethenyl, propenyl, 1-butenyl, 2-butenyl, 1-pentenyl, 1-hexenyl, 1,3-butadienyl, 1,3-pentadienyl, 1,4-pentadienyl and 1,4- hexadienyl groups / moieties. Unless stated otherwise, the term "alkenyl" does not include "cycloalkenyl". Typically an alkenyl group is a C2-C12 alkenyl group. More typically an alkenyl group is a C2-C6 alkenyl group. An "alkenylene" group is similarly defined as a divalent alkenyl group.

[0036] An "alkynyl" substituent group or an alkynyl moiety in a substituent group refers to an unsaturated alkyl group or moiety having one or more carbon-carbon triple bonds. Examples of alkynyl groups / moieties include ethynyl, propargyl, but-l-ynyl and but-2- ynyl groups / moieties. Typically an alkynyl group is a C2-C12 alkynyl group. More typically an alkynyl group is a C2-C6 alkynyl group. An "alkynylene" group is similarly defined as a divalent alkynyl group.

[0037] A "cyclic" substituent group or a cyclic moiety in a substituent group refers to any hydrocarbyl ring, wherein the hydrocarbyl ring may be saturated or unsaturated (including aromatic) and may include one or more heteroatoms, e.g. N, O or S, in its carbon skeleton. Examples of cyclic groups include cycloalkyl, cycloalkenyl, heterocyclic, aryl and heteroaryl groups as discussed below. A cyclic group may be monocyclic, bicyclic (e.g. bridged, fused or spiro), or polycyclic. Typically, a cyclic group is a 3- to 12-membered cyclic group, which means it contains from 3 to 12 ring atoms. More typically, a cyclic group is a 3- to 7-membered monocyclic group, which means it contains from 3 to 7 ring atoms.

[0038] For the avoidance of doubt, where it is stated that a bicyclic or polycyclic group is "saturated" it is to be understood that all of the ring systems within the bicyclic or polycyclic group (excluding any ring systems which are part of or formed by optional substituents) are saturated. A "heterocyclic" substituent group or a heterocyclic moiety in a substituent group refers to a cyclic group or moiety including one or more carbon atoms and one or more (such as one, two, three or four) heteroatoms, e.g. N, O or S, in the ring structure. Examples of heterocyclic groups include heteroaryl groups as discussed below and non-aromatic heterocyclic groups such as azetinyl, azetidinyl, oxetanyl, thietanyl, pyrrolidinyl, tetrahydrofuranyl, tetrahydrothiophenyl, pyrazolidinyl, imidazolidinyl, dioxolanyl, oxathiolanyl, piperidinyl, tetrahydropyranyl, thianyl, piperazinyl, dioxanyl, morpholinyl and thiomorpholinyl groups.

[0039] A "cycloalkyl" substituent group or a cycloalkyl moiety in a substituent group refers to a saturated hydrocarbyl ring containing, for example, from 3 to 7 carbon atoms, examples of which include cyclopropyl, cyclobutyl, cyclopentyl and cyclohexyl. Unless stated otherwise, a cycloalkyl substituent group or moiety may include monocyclic, bicyclic or polycyclic hydrocarbyl rings.

[0040] A "cycloalkenyl" substituent group or a cycloalkenyl moiety in a substituent group refers to a non-aromatic unsaturated hydrocarbyl ring having one or more carboncarbon double bonds and containing, for example, from 3 to 7 carbon atoms, examples of which include cyclopent-l-en-l-yl, cyclohex-l-en-l-yl and cyclohex-1, 3- dien-l-yl. Unless stated otherwise, a cycloalkenyl substituent group or moiety may include monocyclic, bicyclic or polycyclic hydrocarbyl rings.

[0041] An "aryl" substituent group or an aryl moiety in a substituent group refers to an aromatic hydrocarbyl ring. The term "aryl" refers to monocyclic aromatic hydrocarbons and polycyclic fused ring aromatic hydrocarbons wherein all of the fused ring systems (excluding any ring systems which are part of or formed by optional substituents) are aromatic. Examples of aryl groups / moieties include phenyl, naphthyl, anthracenyl and phenanthrenyl. Unless stated otherwise, the term "aryl" does not include "heteroaryl".

[0042] A "heteroaryl" substituent group or a heteroaryl moiety in a substituent group refers to an aromatic heterocyclic group or moiety. The term "heteroaryl" refers to monocyclic aromatic heterocycles and polycyclic fused ring aromatic heterocycles wherein all of the fused ring systems (excluding any ring systems which are part of or formed by optional substituents) are aromatic. Examples of heteroaryl groups / moieties include the following: wherein G = O, S or NH.

[0043] Unless stated otherwise, where a cyclic group or moiety is stated to be aromatic, such as an aryl or a heteroaryl group, it is to be understood that each ring system within the group or moiety (excluding any ring systems which are part of or formed by optional substituents) is aromatic. Similarly, where a cyclic group or moiety is stated to be non-aromatic, such as a cycloalkyl, cycloalkenyl or non-aromatic heterocyclic group, it is to be understood that each ring system within the group or moiety (excluding any ring systems which are part of or formed by optional substituents) is non-aromatic.

[0044] For the purposes of the present specification, where a combination of moieties is referred to as one group, for example, arylalkyl, arylalkenyl, arylalkynyl, alkylaryl, alkenylaryl or alkynylaryl, the last mentioned moiety contains the atom by which the group is attached to the rest of the molecule. An example of an arylalkyl group is benzyl.

[0045] As will be appreciated, in an optionally substituted moiety: each hydrogen atom may optionally be replaced by any specified monovalent substituent; any two hydrogen atoms attached to the same carbon or nitrogen atom may optionally be replaced by any specified n-bonded substituent; any sulphur atom may optionally be substituted with one or two of any specified n-bonded substituents; and any two hydrogen atoms attached to the same or different atoms, within the same optionally substituted group or moiety, may optionally be replaced by any specified divalent bridging substituent.

[0046] Typically a substituted group comprises 1, 2, 3 or 4 substituents, more typically 1, 2 or 3 substituents, more typically 1 or 2 substituents, and more typically 1 substituent.

[0047] Unless stated otherwise, any divalent bridging substituent (e.g. -O-, -S-, -NH-, -CH2-, -CH2-CH2-, etc.) of an optionally substituted group or moiety (e.g. R1) must only be attached to the specified group or moiety and may not be attached to a second group or moiety (e.g. R2), even if the second group or moiety can itself be optionally substituted.

[0048] The term "halo" includes fluoro, chloro, bromo and iodo.

[0049] Unless stated otherwise, where a group is prefixed by the term "halo", such as a haloalkyl or halomethyl group, it is to be understood that the group in question is substituted with one or more halo groups independently selected from fluoro, chloro, bromo and iodo. Typically, the maximum number of halo substituents is limited only by the number of hydrogen atoms available for substitution on the corresponding group without the halo prefix. For example, a halomethyl group may contain one, two or three halo substituents. A haloethyl or halophenyl group may contain one, two, three, four or five halo substituents. Similarly, unless stated otherwise, where a group is prefixed by a specific halo group, it is to be understood that the group in question is substituted with one or more of the specific halo groups. For example, the term "fluoromethyl" refers to a methyl group substituted with one, two or three fluoro groups.

[0050] Similarly, unless stated otherwise, where a group is said to be "halo-substituted", it is to be understood that the group in question is substituted with one or more halo groups independently selected from fluoro, chloro, bromo and iodo. Typically, the maximum number of halo substituents is limited only by the number of hydrogen atoms available for substitution on the group said to be halo-substituted. For example, a halo-substituted methyl group may contain one, two or three halo substituents. A halo-substituted ethyl or halo-substituted phenyl group may contain one, two, three, four or five halo substituents.

[0051] Unless stated otherwise, any reference to an element is to be considered a reference to all isotopes of that element. Thus, for example, unless stated otherwise any reference to hydrogen is considered to encompass all isotopes of hydrogen including deuterium and tritium.

[0052] Unless stated otherwise, any reference to a compound or group is to be considered a reference to all tautomers of that compound or group.

[0053] Where reference is made to a hydrocarbyl or other group including one or more heteroatoms N, O or S in its carbon skeleton, or where reference is made to a carbon atom of a hydrocarbyl or other group being replaced by an N, O or S atom, what is intended is that:

[0054] -CH2- is replaced by -NH-, -O- or -S-;

[0055] -CH3 is replaced by -NH2, -OH or -SH;

[0056] -CH= is replaced by -N = ;

[0057] CH2= is replaced by NH = , 0= or S = ; or

[0058] CH= is replaced by N = ; provided that the resultant group comprises at least one carbon atom. For example, methoxy, dimethylamino and aminoethyl groups are considered to be hydrocarbyl groups including one or more heteroatoms N, O or S in their carbon skeleton.

[0059] Typically, the compounds of the invention contain no more than one quaternary ammonium group. More typically, the compounds of the invention contain no quaternary ammonium groups.

[0060] In the context of the present specification, unless otherwise stated, a Cx-Cygroup is defined as a group containing from x to y carbon atoms. For example, a C1-C4 alkyl group is defined as an alkyl group containing from 1 to 4 carbon atoms. For the purposes of allocating x and y in a Cx-Cygroup, optional substituents are not taken into account when calculating the total number of carbon atoms in the parent group substituted with the optional substituents. For the avoidance of doubt, replacement heteroatoms, e.g. N, O or S, are not to be counted as carbon atoms when calculating the number of carbon atoms in a Cx-Cygroup. For example, a morpholinyl group is to be considered a C4 heterocyclic group, not a Ce heterocyclic group.

[0061] For the purposes of the present specification, where it is stated that a first atom or group is "directly attached" to a second atom or group it is to be understood that the first atom or group is covalently bonded to the second atom or group with no intervening atom(s) or group(s) being present. So, for example, for the group -(C=O)N(CH3)2, the carbon atom of each methyl group is directly attached to the nitrogen atom and the carbon atom of the carbonyl group is directly attached to the nitrogen atom, but the carbon atom of the carbonyl group is not directly attached to the carbon atom of either methyl group. As stated in accordance with the first aspect of the invention, R1and R2are each independently selected from hydrogen or a C1-C12 saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include one or more cyclic groups, wherein the hydrocarbyl group may optionally be substituted with one or more halo and / or -NO2 groups, wherein the hydrocarbyl group may optionally include one or more heteroatoms each independently selected from N, O and S in its carbon skeleton, and wherein any -S- moiety in the hydrocarbyl group may optionally be substituted with one or two groups each independently selected from oxo (=0) and =NH to form a -SO-, -SO2-, -S(=NH)- or -SO( = NH)- moiety, or R1and R2together with the nitrogen atom to which they are attached form a 3- to 12-membered cyclic group, wherein the cyclic group may optionally be substituted with one or more substituents each independently selected from a halo, oxo (=0), -OH, -SH, -NH2, -SO2H, -SO3H, -SO2NH2, -NO2, or a Ci-C6saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more halo and / or -NO2 groups, wherein the hydrocarbyl group may optionally include one or more heteroatoms each independently selected from N, O and S in its carbon skeleton, and wherein any -S- moiety in the hydrocarbyl group may optionally be substituted with one or two groups each independently selected from oxo (=0) and =NH to form a -SO-, -SO2-, -S(=NH)- or -SO( = NH)- moiety.

[0062] In one embodiment of the first aspect of the invention, R1and R2are each independently selected from hydrogen or a C1-C12 saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include one or more cyclic groups, wherein the hydrocarbyl group may optionally be substituted with one or more halo and / or -NO2 groups, wherein the hydrocarbyl group may optionally include one or more heteroatoms each independently selected from N, O and S in its carbon skeleton, and wherein any -S- moiety in the hydrocarbyl group may optionally be substituted with one or two groups each independently selected from oxo (=0) and =NH to form a -SO-, -SO2-, -S(=NH)- or -SO( = NH)- moiety.

[0063] Typically in such an embodiment, R1and R2are each independently selected from hydrogen or a Ci-Cs saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more halo and / or -NO? groups, and wherein the hydrocarbyl group may optionally include one, two, three or four heteroatoms each independently selected from N and O in its carbon skeleton. For example, R1may be a Ci-Cs saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more halo and / or -NO2 groups, and wherein the hydrocarbyl group may optionally include one, two, three or four heteroatoms each independently selected from N and O in its carbon skeleton, and R2may be selected from hydrogen or a C1-C4 alkyl or C1-C4 haloalkyl group.

[0064] In a further embodiment, R1is a Ci-Cs saturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, wherein the hydrocarbyl group optionally includes one or two heteroatoms each independently selected from N and O in its carbon skeleton, and R2is selected from hydrogen or a C1-C3 alkyl or C1-C3 fluoroalkyl group.

[0065] In one embodiment, R1is selected from a methyl, ethyl, isopropyl or cyclopropyl group, any of which may optionally be fluoro substituted, and R2is selected from hydrogen or a methyl or fluoromethyl group. For example, -NRXR2may have the formula -NMe2.

[0066] In another embodiment, R1is a C2-C8 saturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more fluoro groups, wherein the hydrocarbyl group includes one or two heteroatoms each independently selected from N and O in its carbon skeleton, and R2is selected from hydrogen or a C1-C3 alkyl or C1-C3 fluoroalkyl group. For example, R1may be selected from a -(C(R101)2)2-X10-R102or -(C(R101)2)2-X10-(C(R101)2)2-X11-R102group, and R2may be selected from hydrogen or a methyl or fluoromethyl group, wherein :

[0067] X10is selected from O or NR103;

[0068] X11is selected from O or NR104; each R101is hydrogen;

[0069] R102is selected from a methyl, ethyl, isopropyl or cyclopropyl group, any of which may optionally be fluoro substituted;

[0070] R103is selected from hydrogen or a methyl or fluoromethyl group; and R104is selected from hydrogen or a methyl or fluoromethyl group; or a single R101and R103, or a single R101and R104, or R103and R104together form a -(CH2)2- group; provided that any -(C(R101)2)2-X10-R102or -(C(R101)2)2-X10-(C(R101)2)2-X11-R102group contains no more than 8 carbon atoms.

[0071] In one aspect of such an embodiment, -NRlR2has a formula selected from :

[0072] In a particular aspect of such an embodiment:

[0073] X10is NR103;

[0074] X11is NR104; each R101is hydrogen;

[0075] R102is selected from a methyl, ethyl, isopropyl or cyclopropyl group, any of which may optionally be fluoro substituted;

[0076] R103is selected from hydrogen or a methyl or fluoromethyl group; and

[0077] R104is selected from hydrogen or a methyl or fluoromethyl group.

[0078] Thus, in such an aspect, -NRXR2may have a formula selected from :

[0079] In another embodiment, R1has the formula -I -R10, wherein L1is a C1-C2 alkylene or C1-C2 fluoroalkylene group, and R10is a 5- or 6-membered heteroaryl group, such as an imidazolyl, pyrazolyl, oxazolyl, isoxazolyl, thiazolyl or isothiazolyl group, and R2is selected from hydrogen or a C1-C3 alkyl or C1-C3 fluoroalkyl group. Typically in such an embodiment, R2is selected from hydrogen or a methyl or fluoromethyl group. In one aspect of such an embodiment, -NRXR2has a formula selected from :

[0080] In one embodiment of the first aspect of the invention, R1and R2together with the nitrogen atom to which they are attached form a 3- to 12-membered cyclic group, wherein the cyclic group may optionally be substituted with one or more substituents each independently selected from a halo, oxo (=0), -OH, -SH, -NH2, -SO2H, -SO3H, -SO2NH2, -NO2, or a C1-C6 saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more halo and / or -NO2 groups, wherein the hydrocarbyl group may optionally include one or more heteroatoms each independently selected from N, O and S in its carbon skeleton, and wherein any -S- moiety in the hydrocarbyl group may optionally be substituted with one or two groups each independently selected from oxo ( = 0) and = NH to form a -SO-, -SO2-, -S(=NH)- or -SO( = NH)- moiety.

[0081] As will be understood, where R1and R2together with the nitrogen atom to which they are attached form a 3- to 12-membered cyclic group, the resultant cyclic group is a heterocyclic group.

[0082] Typically in such an embodiment, R1and R2together with the nitrogen atom to which they are attached form a 4- to 7-membered monocyclic group or a 6- to 12- membered (e.g. 6- to 10-membered) bicyclic group, wherein the monocyclic or the bicyclic group may optionally be substituted with one or more substituents each independently selected from a halo, oxo (=0), -OH, -NH2 or a C1-C6 saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight- chained or branched, or be or include a cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more halo groups, and wherein the hydrocarbyl group may optionally include one or two heteroatoms each independently selected from N and O in its carbon skeleton.

[0083] Typically where such a monocyclic or bicyclic group is substituted, it is substituted with one or more substituents each independently selected from a fluoro, oxo ( = 0), -OH, -NH2, or a C1-C4 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the saturated hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton.

[0084] Where R1and R2together with the nitrogen atom to which they are attached form a 4- to 7-membered monocyclic group, typically the monocyclic group is a saturated monocyclic group. In one embodiment, R1and R2together with the nitrogen atom to which they are attached form a 6- or 7-membered saturated monocyclic group, wherein the saturated monocyclic group includes one further ring heteroatom selected from N and O in its carbon skeleton (such as a piperazinyl, morpholinyl, diazepanyl or oxazepanyl group), and wherein the saturated monocyclic group may optionally be substituted with one or more substituents each independently selected from a fluoro, oxo (=0), -OH, -NH2, or a C1-C4 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the saturated hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton .

[0085] For example, -NRXR2may have the formula: wherein : n is 1 or 2; m is 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10; each R11is independently selected from a fluoro, methyl or fluoromethyl group, provided that no more than four R11are selected from a methyl or fluoromethyl group;

[0086] X12is O or NR12; and

[0087] R12is hydrogen or a C1-C4 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the saturated hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton.

[0088] Typically, m is 0.

[0089] In one embodiment, X12is O. For example, -NRXR2may have the formula : Typically, X12is NR12.

[0090] Typically, R12is selected from hydrogen or a C1-C4 alkyl, C3-C4 cycloalkyl, C1-C4 fluoroalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R120group, wherein R120is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group. More typically, R12is selected from hydrogen or a C1-C4 alkyl, C3-C4 cycloalkyl, C1-C4 fluoroalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl or fluorocyclopropylmethyl group. For example, R12may be selected from hydrogen or a C1-C4 alkyl, C3-C4 cycloalkyl, C1-C4 fluoroalkyl or C3-C4 fluorocycloalkyl group. More typically still, R12is selected from hydrogen or a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group. Yet more typically, R12is selected from hydrogen or a methyl or fluoromethyl group.

[0091] In one aspect of such an embodiment, -NRXR2has a formula selected from :

[0092] In a particular aspect of such an embodiment, -NRXR2has a formula selected from:

[0093] In another embodiment, R1and R2together with the nitrogen atom to which they are attached form an azetidinyl, pyrrolidinyl, piperidinyl or azepanyl group, wherein the azetidinyl, pyrrolidinyl, piperidinyl or azepanyl group is substituted with a -NR13R14group such that the nitrogen atom of the -NR13R14group is not directly attached to a carbon atom that in turn is directly attached to the ring nitrogen atom of the azetidinyl, pyrrolidinyl, piperidinyl or azepanyl group, wherein R13and R14are each independently selected from hydrogen or a methyl or fluoromethyl group, and wherein the azetidinyl, pyrrolidinyl, piperidinyl or azepanyl group may optionally be further substituted with one or more fluoro groups and / or with one, two, three or four methyl or fluoromethyl groups. Typically in such an embodiment, R1and R2together with the nitrogen atom to which they are attached form a pyrrolidinyl or piperidinyl group, wherein the pyrrolidinyl or piperidinyl group is substituted with an -NR13R14group such that the nitrogen atom of the -NR13R14group is not directly attached to a carbon atom that in turn is directly attached to the ring nitrogen atom of the pyrrolidinyl or piperidinyl group, wherein R13and R14are each independently selected from hydrogen or a methyl or fluoromethyl group.

[0094] In one aspect of such an embodiment, -NRXR2has the formula:

[0095] In yet another embodiment, R1and R2together with the nitrogen atom to which they are attached form a 6- to 12-membered (e.g. 6- to 10-membered) bicyclic group, wherein the bicyclic group may optionally be substituted with one or more substituents each independently selected from a halo, oxo (=0), -OH, -NH2 or a C1-C4 saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight- chained or branched, or be or include a cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more halo groups, and wherein the hydrocarbyl group may optionally include one or two heteroatoms each independently selected from N and O in its carbon skeleton.

[0096] Without wishing to be bound be theory, it is thought that the compounds of the invention where R1and R2together with the nitrogen atom to which they are attached form a bicyclic group offer particular steric and electronic properties that are advantageous to the pharmacological profile of the molecule.

[0097] Where R1and R2together with the nitrogen atom to which they are attached form a 6- to 12-membered bicyclic group, typically the bicyclic group is a saturated bicyclic group. For example, R1and R2may together with the nitrogen atom to which they are attached form a 6- to 12-membered (e.g. 6- to 10-membered) saturated bicyclic group, wherein the saturated bicyclic group may optionally be substituted with one or more substituents each independently selected from a fluoro, oxo (=0), -OH, -NH2 or a C1-C4 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the saturated hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton .

[0098] Typically where R1and R2together with the nitrogen atom to which they are attached form a 6- to 12-membered bicyclic group , R1and R2together with the nitrogen atom to which they are attached form a 8- to 10-membered fused bicyclic group, such that the nitrogen atom of -NR / R2is a ring atom of a first 5- or 6-membered ring of the fused bicyclic group, and the first 5- or 6-membered ring is fused to a second 5- or 6- membered ring of the fused bicyclic group. Typically, the first 5- or 6-membered ring is not aromatic, and the first 5- or 6-membered ring is optionally substituted with one or more substituents each independently selected from a fluoro, oxo ( = 0), -OH, -NH2, or a C1-C4 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the saturated hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton .

[0099] In one embodiment, the second 5- or 6-membered ring is aromatic, and the second 5- or 6-membered ring is optionally substituted with one or more substituents each independently selected from a fluoro, chloro, bromo, -OH, -NH2, or a C1-C4 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the saturated hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton.

[0100] In one aspect of such an embodiment, the first 5- or 6-membered ring is not aromatic and is unsubstituted, and the second 5- or 6-membered ring is an unsubstituted 5- membered heteroaryl ring comprising a NH group. In one aspect of such an embodiment, -NR / R2has the formula:

[0101] In another embodiment, the second 5- or 6-membered ring is not aromatic, and the second 5- or 6-membered ring is optionally substituted with one or more substituents each independently selected from a fluoro, oxo (=0), -OH, -NH2, or a C1-C4 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the saturated hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton. Typically in such an embodiment, the first 5- or 6-membered ring is saturated and the second 5- or 6- membered ring is saturated. For example, R1and R2may together with the nitrogen atom to which they are attached form a 8- to 10-membered saturated fused bicyclic group, such that the nitrogen atom of -NRXR2is a ring atom of a first 5- or 6- membered ring of the fused bicyclic group, wherein the first 5- or 6-membered ring is fused to a second 5- or 6-membered ring of the fused bicyclic group, and wherein the fused bicyclic group may optionally substituted with one or more substituents each independently selected from a fluoro, oxo ( = 0), -OH, -NH2, or a C1-C4 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the saturated hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton.

[0102] Typically in such an embodiment, the second 5- or 6-membered ring comprises at least one ring nitrogen atom. Typically, said ring nitrogen atom is not directly attached to a sp2hybridised carbon atom. Typically where the second 5- or 6-membered ring comprises at least one ring nitrogen atom, the first 5- or 6-membered ring is saturated and the second 5- or 6-membered ring is saturated. For example, R1and R2may together with the nitrogen atom to which they are attached form a 8- to 10- membered saturated fused bicyclic group, such that the nitrogen atom of -NRXR2is a ring atom of a first 5- or 6-membered ring of the fused bicyclic group, wherein the first 5- or 6-membered ring is fused to a second 5- or 6-membered ring of the fused bicyclic group, wherein the second 5- or 6-membered ring comprises at least one ring nitrogen atom, and wherein the fused bicyclic group may optionally substituted with one or more substituents each independently selected from a fluoro, -OH, -NH2, or a C1-C4 alkyl, C3-C4 cycloalkyl, C1-C4 fluoroalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R121group, wherein each R121is independently selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group. More typically, where such a fused bicyclic group is substituted, it is substituted with one or more substituents each independently selected from a fluoro, -OH, -NH2, or a C1-C4 alkyl, C3-C4 cycloalkyl, C1-C4 fluoroalkyl or C3-C4 fluorocycloalkyl group.

[0103] In one embodiment, -NRXR2has the formula: wherein : j is 0, 1, 2 or 3; k is 0, 1, 2 or 3; p is 0, 1, 2 or 3; and q is 0, 1, 2 or 3; provided that: j + k = 2 or 3; p + q = 2 or 3; when j = 0, q is 1, 2 or 3; when k = 0, p is 1, 2 or 3; when p = 0, k is 1, 2 or 3; and when q = 0, j is 1, 2 or 3; and wherein : r is 0, 1 or 2; s is 0, 1 or 2;

[0104] R15is hydrogen or a C1-C4 alkyl, C3-C4 cycloalkyl, C1-C4 fluoroalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R150group, wherein R150is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group; and each R16is independently selected from a methyl or fluoromethyl group.

[0105] Typically in such an embodiment, j is 1 or 2 and k is 1 or 2. More typically, j is 1 and k is 1.

[0106] Typically in such an embodiment, p is 0, 1 or 2 and q is 1 or 2. More typically, p is 1 or 2 and q is 1 or 2. More typically still, p is 1 and q is 1.

[0107] Typically in such an embodiment, r is 0 and s is 0.

[0108] Thus, for example, -NRXR2may have the formula : wherein : p is 1 or 2; q is 1 or 2; p + q = 2 or 3; and

[0109] R15is hydrogen or a C1-C4 alkyl, C3-C4 cycloalkyl, C1-C4 fluoroalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R150group, wherein R150is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group.

[0110] Typically in the above embodiments, j + k = 2 and p + q = 2.

[0111] Typically in the above embodiments, R15is hydrogen or a C1-C4 alkyl, C3-C4 cycloalkyl, C1-C4 fluoroalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl or fluorocyclopropylmethyl group. More typically, R15is hydrogen or a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group.

[0112] For example, -NRXR2may have a formula selected from :

[0113] In a particular aspect of such an embodiment, -NRXR2has the formula : In a further embodiment, -NRXR2has the formula: wherein : r is 0, 1 or 2; s is 0, 1 or 2; t is 1 or 2; and each R16is independently selected from a methyl or fluoromethyl group.

[0114] Typically in such an embodiment, r is 0 and s is 0.

[0115] Typically in such an embodiment, t is 1.

[0116] For example, -NRXR2may have the formula:

[0117] In yet another embodiment, -NRXR2has the formula: wherein : j is 0, 1, 2 or 3; and k is 0, 1, 2 or 3; provided that j + k = 2 or 3; and wherein : v is 1 or 2; r is 0, 1 or 2; s is 0, 1 or 2; and each R16is independently selected from a methyl or fluoromethyl group. Typically in such an embodiment, j is 1 or 2 and k is 1 or 2. More typically, j is 1 and k is 1.

[0118] Typically in such an embodiment, v is 1.

[0119] Typically in such an embodiment, r is 0 and s is 0.

[0120] For example, -NRXR2may have the formula:

[0121] As will be understood, where a first 5- or 6-membered ring is fused to a second 5- or 6-membered ring across two sp3hybridised ring carbon atoms, e.g. across two ring carbon atoms in a saturated fused bicyclic ring system, the second ring may be fused cis- or trans- to the first ring. For example, -NRXR2may have the formula:

[0122] In another embodiment, where R1and R2together with the nitrogen atom to which they are attached form a 6- to 12-membered bicyclic group, R1and R2together with the nitrogen atom to which they are attached form a 6- to 12-membered spiro bicyclic group, such that the nitrogen atom of -NRXR2is a ring atom of a first 4- to 7- membered ring of the spiro bicyclic group, and the first 4 to 7-membered ring shares a spiro ring atom with a second 3- to 7-membered ring of the spiro bicyclic group. Typically, the 6- to 12-membered spiro bicyclic group is unsubstituted or substituted with one or more substituents each independently selected from a fluoro, oxo ( = 0), -OH, -NH2, or a C1-C4 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the saturated hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton.

[0123] Typically in such an embodiment, the first 4- to 7-membered ring is saturated and the second 3- to 7-membered ring is saturated. For example, R1and R2may together with the nitrogen atom to which they are attached form a 9- to 11-membered saturated spiro bicyclic group, such that the nitrogen atom of -NRXR2is a ring atom of a first 5- or 6-membered ring of the spiro bicyclic group, and the first 5- or 6-membered ring shares a spiro ring atom with a second 5- or 6-membered ring of the spiro bicyclic group, and wherein the saturated spiro bicyclic group may optionally substituted with one or more substituents each independently selected from a fluoro, oxo (=0), -OH, -NH2, or a C1-C4 alkyl, C3-C4 cycloalkyl, C1-C4 fluoroalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl or fluorocyclopropylmethyl group.

[0124] Typically in such an embodiment, the second 3- to 7-membered ring is a 4- to 7- membered ring that comprises at least one ring nitrogen or ring oxygen atom. Typically, said ring nitrogen or ring oxygen atom is not directly attached to a sp2hybridised carbon atom. Typically where the second 4- to 7-membered ring comprises at least one ring nitrogen atom or at least one ring oxygen atom, the first 4- to 7- membered ring is saturated and the second 4- to 7-membered ring is saturated. For example, R1and R2may together with the nitrogen atom to which they are attached form a 9- to 11-membered saturated spiro bicyclic group, such that the nitrogen atom of -NRXR2is a ring atom of a first 5- or 6-membered ring of the spiro bicyclic group, and the first 5- or 6-membered ring shares a spiro ring atom with a second 5- or 6- membered ring of the spiro bicyclic group, wherein the second 5- or 6-membered ring comprises at least one ring nitrogen atom or at least one ring oxygen atom, and wherein the saturated spiro bicyclic group may optionally substituted with one or more substituents each independently selected from a fluoro, oxo (=0), -OH, -NH2, or a Ci- C4 alkyl, C3-C4 cycloalkyl, C1-C4 fluoroalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl or fluorocyclopropylmethyl group.

[0125] Typically, where the saturated spiro bicyclic group is substituted, it is substituted with one or more substituents each independently selected from a fluoro, oxo (=0), C1-C4 alkyl, C3-C4 cycloalkyl, C1-C4 fluoroalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl or fluorocyclopropylmethyl group.

[0126] In one embodiment, -NRXR2has the formula: wherein :

[0127] X15is O or NR15; j is 0, 1, 2, 3 or 4; k is 0, 1, 2, 3 or 4; p is 0, 1, 2, 3 or 4; and q is 0, 1, 2, 3 or 4; provided that: j + k = 3 or 4; p + q = 3 or 4; when j = 0, q is 1, 2, 3 or 4 and p is 1, 2, 3 or 4; when k = 0, q is 1, 2, 3 or 4 and p is 1, 2, 3 or 4; when p = 0, k is 1, 2, 3 or 4 and j is 1, 2, 3 or 4; and when q = 0, k is 1, 2, 3 or 4 and j is 1, 2, 3 or 4; and wherein : r is 0, 1 or 2; s is 0, 1 or 2;

[0128] R15is hydrogen or a C1-C4 alkyl, C3-C4 cycloalkyl, C1-C4 fluoroalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R150group, wherein R150is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group; and each R16is independently selected from a methyl or fluoromethyl group.

[0129] Typically in such an embodiment, j is 1 or 2 and k is 1 or 2.

[0130] Typically in such an embodiment, p is 0, 1 or 2 and q is 1, 2 or 3. More typically, p is 0, 1 or 2 and q is 2 or 3.

[0131] Typically in such an embodiment, r is 0 and s is 0.

[0132] Typically in such an embodiment, R15is hydrogen or a C1-C4 alkyl, C3-C4 cycloalkyl, Ci- C4 fluoroalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl or fluorocyclopropylmethyl group. More typically, R15is hydrogen or a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group. More typically still, R15is hydrogen or a methyl or fluoromethyl group.

[0133] For example, -NRXR2may have a formula selected from:

[0134] In a particular aspect of such an embodiment, X15is NR15. For example, -NRXR2may have a formula selected from:

[0135] In another embodiment, -NRXR2has the formula: wherein : j is 0, 1, 2, 3 or 4; k is 0, 1, 2, 3 or 4; p is 0, 1, 2 or 3; and q is 0, 1, 2 or 3; provided that: j + k = 3 or 4; p + q = 2 or 3; when j = 0, p is 1, 2 or 3; when k = 0, p is 1, 2 or 3; and when p = 0, j is 1, 2, 3 or 4 and k is 1, 2, 3 or 4; and wherein : r is 0, 1 or 2; s is 0, 1 or 2; R15is hydrogen or a C1-C4 alkyl, C3-C4 cycloalkyl, C1-C4 fluoroalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl or fluorocyclopropylmethyl group; and each R16is independently selected from a methyl or fluoromethyl group.

[0136] Typically in such an embodiment, j is 1 or 2 and k is 1 or 2.

[0137] Typically in such an embodiment, p is 1 or 2 and q is 1 or 2.

[0138] Typically in such an embodiment, r is 0 and s is 0.

[0139] Typically in such an embodiment, R15is hydrogen or a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group. More typically, R15is hydrogen or a methyl or fluoromethyl group. More typically still, R15is hydrogen.

[0140] For example, -NRXR2may have the formula:

[0141] In a further embodiment, where R1and R2together with the nitrogen atom to which they are attached form a 6- to 12-membered bicyclic group, R1and R2together with the nitrogen atom to which they are attached form a 7- to 9-membered bridged bicyclic group. Typically, the 7- to 9-membered bridged bicyclic group is unsubstituted or substituted with one or more substituents each independently selected from a fluoro, oxo ( = 0), -OH, -NH2, or a C1-C4 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the saturated hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton.

[0142] Typically in such an embodiment, the 7- to 9-membered bridged bicyclic group is saturated. For example, R1and R2may together with the nitrogen atom to which they are attached form a 7- or 8-membered saturated bridged bicyclic group, wherein the saturated bridged bicyclic group may optionally substituted with one or more substituents each independently selected from a fluoro, oxo (=0), -OH, -NH2, or a Ci- C4 alkyl, C3-C4 cycloalkyl, C1-C4 fluoroalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R121group, wherein each R121is independently selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group.

[0143] Typically in such an embodiment, the 7- to 9-membered bridged bicyclic group comprises a least one further ring nitrogen or ring oxygen atom. Typically, said further ring nitrogen or ring oxygen atom is not directly attached to a sp2hybridised carbon atom. Typically where the 7- to 9-membered bridged bicyclic group comprises a least one further ring nitrogen or ring oxygen atom, the 7- to 9-membered bridged bicyclic group is saturated. For example, R1and R2may together with the nitrogen atom to which they are attached form a 7- or 8-membered saturated bridged bicyclic group, wherein the saturated bridged bicyclic group contains one further ring nitrogen atom, and wherein the saturated bridged bicyclic group may optionally substituted with one or more substituents each independently selected from a fluoro, oxo ( = 0), -OH, -NH2, or a C1-C4 alkyl, C3-C4 cycloalkyl, C1-C4 fluoroalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R121group, wherein each R121is independently selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group.

[0144] Typically, where the saturated bridged bicyclic group is substituted, it is substituted with one or more substituents each independently selected from a fluoro, oxo ( = 0), C1-C4 alkyl, C3-C4 cycloalkyl, C1-C4 fluoroalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl or fluorocyclopropylmethyl group.

[0145] In one embodiment, -NRXR2has the formula : wherein : w is 1 or 2;

[0146] X15is O or NR15;

[0147] R15is hydrogen or a C1-C4 alkyl, C3-C4 cycloalkyl, C1-C4 fluoroalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R150group, wherein R150is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group; one R17and one R18together form a -CH2- or -CH2CH2- group; and each remaining R17and R18is hydrogen.

[0148] Typically in such an embodiment, w is 1.

[0149] Typically in such an embodiment, X15is NR15.

[0150] Typically in such an embodiment, R15is hydrogen or a C1-C4 alkyl, C3-C4 cycloalkyl, Ci- C4 fluoroalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl or fluorocyclopropylmethyl group. More typically, R15is hydrogen or a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group. More typically still, R15is hydrogen or a methyl or fluoromethyl group. Yet more typically, R15is a methyl or fluoromethyl group.

[0151] Typically in such an embodiment, one R17and one R18together form a -CH2CH2- group.

[0152] For example, -NRXR2may have the formula :

[0153] As stated in accordance with the first aspect of the invention, R3and R4are each independently selected from hydrogen or a C1-C12 saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include one or more cyclic groups, wherein the hydrocarbyl group may optionally be substituted with one or more halo and / or -NO2 groups, wherein the hydrocarbyl group may optionally include one or more heteroatoms each independently selected from N, O and S in its carbon skeleton, and wherein any -S- moiety in the hydrocarbyl group may optionally be substituted with one or two groups each independently selected from oxo (=0) and =NH to form a -SO-, -SO2-, -S(=NH)- or -SO( = NH)- moiety, or R3and R4together with the nitrogen atom to which they are attached form a 3- to 12-membered cyclic group, wherein the cyclic group may optionally be substituted with one or more substituents each independently selected from a halo, oxo (=0), -OH, -SH, -NH2, -SO2H, -SO3H, -SO2NH2, -NO2, or a Ci-C6saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more halo and / or -NO2 groups, wherein the hydrocarbyl group may optionally include one or more heteroatoms each independently selected from N, O and S in its carbon skeleton, and wherein any -S- moiety in the hydrocarbyl group may optionally be substituted with one or two groups each independently selected from oxo (=0) and =NH to form a -SO-, -SO2-, -S(=NH)- or -SO( = NH)- moiety, or R3and R4together with the nitrogen atom to which they are attached form a -NO2 group.

[0154] In one embodiment of the first aspect of the invention, R3and R4are each independently selected from hydrogen or a C1-C12 saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include one or more cyclic groups, wherein the hydrocarbyl group may optionally be substituted with one or more halo and / or -NO2 groups, wherein the hydrocarbyl group may optionally include one or more heteroatoms each independently selected from N, O and S in its carbon skeleton, and wherein any -S- moiety in the hydrocarbyl group may optionally be substituted with one or two groups each independently selected from oxo (=0) and =NH to form a -SO-, -SO2-, -S(=NH)- or -SO( = NH)- moiety, or R3and R4together with the nitrogen atom to which they are attached form a 3- to 12-membered cyclic group, wherein the cyclic group may optionally be substituted with one or more substituents each independently selected from a halo, oxo (=0), -OH, -SH, -NH2, -SO2H, -SO3H, -SO2NH2, -NO2, or a Ci-C6saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more halo and / or -NO2 groups, wherein the hydrocarbyl group may optionally include one or more heteroatoms each independently selected from N, O and S in its carbon skeleton, and wherein any -S- moiety in the hydrocarbyl group may optionally be substituted with one or two groups each independently selected from oxo (=0) and =NH to form a -SO-, -SO2-, -S(=NH)- or -SO( = NH)- moiety. Typically in such an embodiment, Q1is O, S, N-H, N-RQ1, C-H, C-Hal, or C-R^2.

[0155] In one embodiment of the first aspect of the invention, R3and R4are each independently selected from hydrogen or a C1-C12 saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include one or more cyclic groups, wherein the hydrocarbyl group may optionally be substituted with one or more halo and / or -NO2 groups, wherein the hydrocarbyl group may optionally include one or more heteroatoms each independently selected from N, O and S in its carbon skeleton, and wherein any -S- moiety in the hydrocarbyl group may optionally be substituted with one or two groups each independently selected from oxo (=0) and =NH to form a -SO-, -SO2-, -S(=NH)- or -SO( = NH)- moiety. Typically in such an embodiment, R3and R4are each independently selected from hydrogen or a C1-C12 saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include one or two cyclic groups, wherein the hydrocarbyl group may optionally be substituted with one or more halo and / or -NO2 groups, and wherein the hydrocarbyl group may optionally include one, two, three or four heteroatoms each independently selected from N and O in its carbon skeleton. For example, R3may be selected from hydrogen or a C1-C12 saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include one or two cyclic groups, wherein the hydrocarbyl group may optionally be substituted with one or more halo and / or -NO2 groups, and wherein the hydrocarbyl group may optionally include one, two, three or four heteroatoms each independently selected from N and O in its carbon skeleton, and R4may be selected from hydrogen or a C1-C4 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the saturated hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton.

[0156] More typically, R3and R4are each independently selected from hydrogen or a C1-C10 or Ci-Cs saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more halo and / or -NO2 groups, and wherein the hydrocarbyl group may optionally include one, two, three or four heteroatoms each independently selected from N and O in its carbon skeleton. For example, R3may be a Ci-Cs saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more halo and / or -NO2 groups, and wherein the hydrocarbyl group may optionally include one, two, three or four heteroatoms each independently selected from N and O in its carbon skeleton, and R4may be selected from hydrogen or a C1-C4 alkyl or C1-C4 haloalkyl group.

[0157] In one embodiment:

[0158] R3is selected from hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C2-C4 alkenyl, C2-C4 fluoroalkenyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R300group, wherein R300is selected from a C1-C3 alkyl, Ci-C3fluoroalkyl, C2-C3 alkenyl, C2-C3 fluoroalkenyl, cyclopropyl or fluorocyclopropyl group; and

[0159] R4is selected from hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C2-C4 alkenyl, C2-C4 fluoroalkenyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R400group, wherein R400is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, C2-C3 alkenyl, C2-C3 fluoroalkenyl, cyclopropyl or fluorocyclopropyl group; or

[0160] R3and R4together with the nitrogen atom to which they are attached form an azetidinyl, pyrrolidinyl, piperidinyl or azepanyl group.

[0161] Typically in such an embodiment, R3is selected from hydrogen or a C1-C3 alkyl, C1-C3 fluoroalkyl, C2-C3 alkenyl, C2-C3 fluoroalkenyl, cyclopropyl, fluorocyclopropyl, or -CO-R300group, wherein R300is selected from a methyl, ethyl, fluoromethyl, fluoroethyl, ethenyl or fluoroethenyl group.

[0162] Typically in such an embodiment, R4is selected from hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R400group, wherein R400is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group. More typically, R4is selected from hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl or fluorocyclopropylmethyl group. Yet more typically, R4is selected from hydrogen or a methyl or fluoromethyl group. Most typically, R4is hydrogen.

[0163] For example, -NR3R4may have the formula -NH2, -NHMe, -NHCOMe or -NH-CO-CH=CH2.

[0164] In one aspect of such an embodiment, R3is selected from hydrogen or a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl, or fluorocyclopropyl group, and R4is hydrogen. For example, R3may be selected from hydrogen or a methyl or fluoromethyl group and R4may be hydrogen. In a particular embodiment, R3and R4are both hydrogen. As will be understood, in such an embodiment, the compound is a compound of Formula (II) :

[0165] Formula (II) wherein R1, R2, Xx-X4, Ax-A6and Q1are as defined in accordance with Formula (I).

[0166] In a further embodiment, R3and R4are each independently selected from hydrogen or a C1-C12 saturated hydrocarbyl group, wherein the hydrocarbyl group may be straight- chained or branched, or be or include one or two cyclic groups, wherein the hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups, and wherein the hydrocarbyl group may optionally include one, two, three or four heteroatoms each independently selected from N and O in its carbon skeleton. For example, R3may be selected from hydrogen or a C1-C12 saturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include one or two cyclic groups, wherein the hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups, and wherein the hydrocarbyl group may optionally include one, two, three or four heteroatoms each independently selected from N and O in its carbon skeleton, and R4may be selected from hydrogen or a C1-C4 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the saturated hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton.

[0167] More typically in such an embodiment, R3and R4are each independently selected from hydrogen or a C1-C10 saturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the hydrocarbyl group may optionally include one or two heteroatoms each independently selected from N and O in its carbon skeleton. For example, R3may be a C1-C10 saturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the hydrocarbyl group may optionally include one or two heteroatoms each independently selected from N and O in its carbon skeleton, and R4may be selected from hydrogen or a C1-C4 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the saturated hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton.

[0168] In another embodiment, R3has the formula -L3-Q3-R31, wherein:

[0169] Q3is O, S or NR32;

[0170] L3is a straight-chained alkylene group, wherein the straight-chained alkylene group optionally includes a single heteroatom independently selected from O and N in its carbon skeleton, wherein L3has a chain length of from 2 to 6 atoms, and wherein L3may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL3;

[0171] R31is hydrogen or a C1-C6 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups, and wherein the saturated hydrocarbyl group may optionally include one or two heteroatoms each independently selected from N and O in its carbon skeleton;

[0172] R32is hydrogen or a C1-C6 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups, and wherein the saturated hydrocarbyl group may optionally include one or two heteroatoms each independently selected from N, O and S in its carbon skeleton, wherein any -S- moiety in the saturated hydrocarbyl group may optionally be substituted with one or two groups each independently selected from oxo (=0) and =NH to form a -SO-, -SO2-, -S( = NH)- or -SO( = NH)- moiety; each RL3is independently selected from a methyl or fluoromethyl group; or any two RL3may, together with the atom or atoms to which they are attached, form a 3- to 7-membered saturated monocyclic group, wherein the 3- to 7- membered saturated monocyclic group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL4; or any RL3and R31may, together with the atoms to which they are attached, form a 3- to 7-membered saturated monocyclic heterocyclic group, wherein the 3- to 7-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL4; or R31and R32may, together with the nitrogen atom to which they are attached form a 3- to 7-membered saturated monocyclic heterocyclic group, wherein the 3- to 7-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL4; or any two RL3and R31may, together with the atoms to which they are attached, form a 7- to 10-membered saturated bicyclic heterocyclic group, wherein the 7- to 10-membered saturated bicyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL4; or any RL3, R31and R32may, together with the atoms to which they are attached, form a 7- to 10-membered saturated bicyclic heterocyclic group, wherein the 7- to 10-membered saturated bicyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL4; and each RL4is independently selected from a methyl or a fluoromethyl group; provided that the group -L3-Q3-R31contains no more than 12 carbon atoms.

[0173] As will be understood, in such an embodiment the compound is a compound of Formula (III) : wherein R1, R2, Xx-X4, Ax-A6, Q1, L3, Q3, R31and R4are as defined in accordance with Formula (I). As will also be understood, where any two or more groups together with the atom or atoms to which they are attached form a cyclic group, the two or more groups may together form a single ring atom or more than one ring atom of the cyclic group. For instance, in the above embodiment where two RL3together with the atom or atoms to which they are attached form a 3-membered saturated monocyclic group, the two RL3may for example together form a -CH2- or a -CH2CH2- group. Thus, by way of example it may be envisaged that L3may have the formula :

[0174] Typically, the group -L3-Q3-R31contains no more than 10 carbon atoms.

[0175] Typically where R3has the formula -L3-Q3-R31, Q3is O or NR32. More typically, Q3is NR32, i.e. R3has the formula -L3-NR31R32. As will be understood, in such an embodiment, the compound is a compound of Formula (IV) : wherein R1, R2, Xx-X4, Ax-A6, Q1, L3, R31, R32and R4are as defined in accordance with Formula (I).

[0176] In one aspect of such an embodiment, R3has the formula -L3-NR31R32, wherein :

[0177] L3is a C2-C4 straight-chained alkylene group, wherein the alkylene group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL3; each RL3is independently selected from a methyl or a fluoromethyl group;

[0178] R31is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group; and R32is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group; or R31and R32together form a C2-C6 straight-chained alkylene group, wherein the alkylene group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups R33; each R33is independently selected from a methyl or a fluoromethyl group; or any RL3and R31, or any RL3and R32, together form a C2-C4 straight-chained alkylene group, wherein the alkylene group may optionally be substituted with one or more fluoro groups and / or a single oxo ( = 0) group and / or one, two, three or four groups R34; and each R34is independently selected from a methyl or a fluoromethyl group; provided that the group -L3-NR31R32contains no more than 8 carbon atoms and that the group -L3-NR31R32contains no more than three oxo (=0) groups.

[0179] In another embodiment, Q3is O. As will be understood, in such an embodiment, the compound is a compound of Formula (V):

[0180] Formula (V) wherein R1, R2, Xx-X4, Ax-A6, Q1, L3, R31and R4are as defined in accordance with Formula (I).

[0181] In one aspect of such an embodiment, R3has the formula -L35-OR35, wherein :

[0182] L35is a C2-C4 straight-chained alkylene group, wherein the alkylene group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL35; each RL35is independently selected from a methyl or a fluoromethyl group; and R35is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group; or any RL35and R35together form a C2-C4 straight-chained alkylene group, wherein the alkylene group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group and / or one, two, three or four groups R36; and each R36is independently selected from a methyl or a fluoromethyl group; provided that the group -L35-OR35contains no more than 8 carbon atoms and that the group -L35-OR35contains no more than three oxo (=0) groups.

[0183] Typically in such an aspect, R4is selected from hydrogen or a C1-C4 alkyl or C1-C4 fluoroalkyl group. More typically, R4is hydrogen.

[0184] Typically in such an aspect, L35is a C2-C4 straight-chained alkylene group, wherein the alkylene group may optionally be substituted with one or more fluoro groups and / or one, two, three or four groups RL35.

[0185] Typically where R3has the formula -L3-Q3-R31, L3is a straight-chained alkylene group, wherein the straight-chained alkylene group optionally includes a single nitrogen atom in its carbon skeleton, wherein L3has a chain length of from 2 to 6 atoms, and wherein L3may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group and / or one or two groups RL3. In one embodiment, L3is a C2-C4 straight-chained alkylene group, wherein the alkylene group may optionally be substituted with one or more fluoro groups and / or one, two, three or four groups RL3.

[0186] Typically where R3has the formula -L3-Q3-R31:

[0187] R31is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group;

[0188] R32is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group; and each RL3is independently selected from a methyl or fluoromethyl group; or any two RL3may, together with the atom or atoms to which they are attached, form a 3- to 6-membered saturated monocyclic group, wherein the 3- to 6- membered saturated monocyclic group may optionally be substituted with one or more fluoro groups and / or a single oxo ( = 0) group and / or one or two groups RL4; or any RL3and R31may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group and / or one or two groups RL4; or R31and R32may, together with the nitrogen atom to which they are attached form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group and / or one or two groups RL4; and each RL4is independently selected from a methyl or a fluoromethyl group.

[0189] Typically where R3has the formula -L3-Q3-R31, R4is selected from hydrogen or a C1-C4 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the saturated hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton. More typically, R4is selected from hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R400group, wherein R400is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group. More typically still, R4is selected from hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl or fluorocyclopropylmethyl group. For example, R4may be selected from hydrogen or a C1-C4 alkyl or C1-C4 fluoroalkyl group. Yet more typically, R4is selected from hydrogen or a methyl or fluoromethyl group. Most typically, R4is hydrogen.

[0190] Thus, there is provided an embodiment wherein :

[0191] R3has the formula -L3-NR31R32, provided that the group -L3-NR31R32contains no more than 10 carbon atoms;

[0192] L3is a straight-chained alkylene group, wherein the straight-chained alkylene group optionally includes a single nitrogen atom in its carbon skeleton, wherein L3has a chain length of from 2 to 6 atoms, and wherein L3may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group and / or one or two groups RL3;

[0193] R31is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group;

[0194] R32is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group; and each RL3is independently selected from a methyl or fluoromethyl group; or any two RL3may, together with the atom or atoms to which they are attached, form a 3- to 6-membered saturated monocyclic group, wherein the 3- to 6- membered saturated monocyclic group may optionally be substituted with one or more fluoro groups and / or a single oxo ( = 0) group and / or one or two groups RL4; or any RL3and R31may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group and / or one or two groups RL4; or R31and R32may, together with the nitrogen atom to which they are attached form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group and / or one or two groups RL4; each RL4is independently selected from a methyl or a fluoromethyl group;

[0195] R4is selected from hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R400group; and

[0196] R400is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group.

[0197] In one aspect, where R3has the formula -L3-NR31R32, R4is selected from hydrogen or a C1-C4 alkyl or C1-C4 fluoroalkyl group.

[0198] Similarly, there is provided an embodiment wherein:

[0199] R3has the formula -L3-OR31, provided that the group -L3-OR31contains no more than 10 carbon atoms;

[0200] L3is a straight-chained alkylene group, wherein the straight-chained alkylene group optionally includes a single nitrogen atom in its carbon skeleton, wherein L3has a chain length of from 2 to 6 atoms, and wherein L3may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group and / or one or two groups RL3;

[0201] R31is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group; and each RL3is independently selected from a methyl or fluoromethyl group; or any two RL3may, together with the atom or atoms to which they are attached, form a 3- to 6-membered saturated monocyclic group, wherein the 3- to 6- membered saturated monocyclic group may optionally be substituted with one or more fluoro groups and / or a single oxo ( = 0) group and / or one or two groups RL4; or any RL3and R31may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group and / or one or two groups RL4; each RL4is independently selected from a methyl or a fluoromethyl group;

[0202] R4is selected from hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R400group; and

[0203] R400is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group.

[0204] In another embodiment, R3has the formula -CO-L31-NR31R32, wherein:

[0205] L31is a straight-chained alkylene group, wherein the straight-chained alkylene group optionally includes a single heteroatom independently selected from O and N in its carbon skeleton, wherein L31has a chain length of from 2 to 5 atoms, and wherein L3may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL3;

[0206] R31is hydrogen or a C1-C6 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups, and wherein the saturated hydrocarbyl group may optionally include one or two heteroatoms each independently selected from N and O in its carbon skeleton;

[0207] R32is hydrogen or a C1-C6 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups, and wherein the saturated hydrocarbyl group may optionally include one or two heteroatoms each independently selected from N, O and S in its carbon skeleton, wherein any -S- moiety in the saturated hydrocarbyl group may optionally be substituted with one or two groups each independently selected from oxo (=0) and =NH to form a -SO-, -SO2-, -S( = NH)- or -SO( = NH)- moiety; each RL3is independently selected from a methyl or fluoromethyl group; or any two RL3may, together with the atom or atoms to which they are attached, form a 3- to 7-membered saturated monocyclic group, wherein the 3- to 7- membered saturated monocyclic group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL4; or any RL3and R31may, together with the atoms to which they are attached, form a 3- to 7-membered saturated monocyclic heterocyclic group, wherein the 3- to 7-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL4; or R31and R32may, together with the nitrogen atom to which they are attached form a 3- to 7-membered saturated monocyclic heterocyclic group, wherein the 3- to 7-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL4; or any two RL3and R31may, together with the atoms to which they are attached, form a 7- to 10-membered saturated bicyclic heterocyclic group, wherein the 7- to 10-membered saturated bicyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL4; or any RL3, R31and R32may, together with the atoms to which they are attached, form a 7- to 10-membered saturated bicyclic heterocyclic group, wherein the 7- to 10-membered saturated bicyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL4; and each RL4is independently selected from a methyl or a fluoromethyl group; provided that the group -CO-L31-NR31R32contains no more than 12 carbon atoms.

[0208] As will be understood, in such an embodiment, the compound is a compound of Formula (VI):

[0209] Formula (VI) wherein R1, R2, Xx-X4, Ax-A6, Q1, R4, L31, R31and R32are as defined in accordance with Formula (I).

[0210] Typically, the group -CO-L31-NR31R32contains no more than 10 carbon atoms. More typically, the group -CO-L31-NR31R32contains no more than 8 carbon atoms.

[0211] In one aspect of such an embodiment:

[0212] L31is a C1-C3 straight-chained alkylene group, wherein the alkylene group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group and / or one, two, three or four groups RL3; each RL3is independently selected from a methyl or a fluoromethyl group;

[0213] R31is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group; and

[0214] R32is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group; or R31and R32together form a C2-C6 straight-chained alkylene group, wherein the alkylene group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups R33; each R33is independently selected from a methyl or a fluoromethyl group; or any RL3and R31, or any RL3and R32, together form a C2-C4 straight-chained alkylene group, wherein the alkylene group may optionally be substituted with one or more fluoro groups and / or a single oxo ( = 0) group and / or one, two, three or four groups R34; and each R34is independently selected from a methyl or a fluoromethyl group; provided that the group -CO-L31-NR31R32contains no more than 8 carbon atoms and that the group -CO-L31-NR31R32contains no more than three oxo ( = 0) groups.

[0215] Typically in such an aspect, R4is selected from hydrogen or a C1-C4 alkyl or C1-C4 fluoroalkyl group. More typically, R4is hydrogen.

[0216] In another aspect of such an embodiment, R3has the formula -CO-L31-NR31R32, wherein :

[0217] L31is a C1-C3 straight-chained alkylene group, wherein the alkylene group may optionally be substituted with one or more fluoro groups and / or one, two, three or four groups RL3; each RL3is independently selected from a methyl or a fluoromethyl group;

[0218] R31is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups; and

[0219] R32is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups; or R31and R32together form a C2-C6 straight-chained alkylene group, wherein the alkylene group may optionally be substituted with one or more fluoro groups and / or one, two, three or four groups R33; each R33is independently selected from a methyl or a fluoromethyl group; or any RL3and R31, or any RL3and R32, together form a C2-C4 straight-chained alkylene group, wherein the alkylene group may optionally be substituted with one or more fluoro groups and / or one, two, three or four groups R34; and each R34is independently selected from a methyl or a fluoromethyl group; provided that the group -CO-L31-NR31R32contains no more than 8 carbon atoms.

[0220] Typically in such an aspect, R4is selected from hydrogen or a C1-C3 alkyl or C1-C3 fluoroalkyl group. More typically, R4is hydrogen.

[0221] Typically where R3has the formula -CO-L31-NR31R32, L31is a straight-chained alkylene group, wherein the straight-chained alkylene group optionally includes a single nitrogen atom in its carbon skeleton, wherein L31has a chain length of from 2 to 5 atoms, and wherein L31may optionally be substituted with one or more fluoro groups and / or one or two groups RL3. Typically, the atom of L31that is directly attached to the carbon atom of the carbonyl group of -CO-L31-NR31R32is a carbon atom. Typically, the atom of L31that is directly attached to the nitrogen atom of -NR31R32is a carbon atom. More typically, where R3has the formula -CO-L31-NR31R32, L31is a C2-C5 straight- chained alkylene group or a -CH2CH2-NH-CH2CH2- group, wherein the alkylene or the -CH2CH2-NH-CH2CH2- group may optionally be substituted with one or more fluoro groups and / or one or two groups RL3.

[0222] Typically where R3has the formula -CO-L31-NR31R32:

[0223] R31is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group;

[0224] R32is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group; and each RL3is independently selected from a methyl or fluoromethyl group; or any two RL3may, together with the atom or atoms to which they are attached, form a 3- to 6-membered saturated monocyclic group, wherein the 3- to 6- membered saturated monocyclic group may optionally be substituted with one or more fluoro groups and / or a single oxo ( = 0) group and / or one or two groups RL4; or any RL3and R31may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group and / or one or two groups RL4; or R31and R32may, together with the nitrogen atom to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group and / or one or two groups RL4; and each RL4is independently selected from a methyl or a fluoromethyl group.

[0225] More typically where R3has the formula -CO-L31-NR31R32:

[0226] R31is hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl or fluorocyclopropylmethyl group;

[0227] R32is hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl or fluorocyclopropylmethyl group; and each RL3is independently selected from a methyl or fluoromethyl group; or any RL3and R31may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups; or R31and R32may, together with the nitrogen atom to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups.

[0228] Typically where R3has the formula -CO-L31-NR31R32, R4is selected from hydrogen or a C1-C4 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the saturated hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton. More typically, R4is selected from hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R400group, wherein R400is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group. More typically still, R4is selected from hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl or fluorocyclopropylmethyl group. For example, R4may be selected from hydrogen or a C1-C4 alkyl or C1-C4 fluoroalkyl group. Yet more typically, R4is selected from hydrogen or a methyl or fluoromethyl group. Most typically, R4is hydrogen.

[0229] Thus, there is provided an embodiment wherein :

[0230] R3has the formula -CO-L31-NR31R32, provided that the group -CO-L31-NR31R32contains no more than 10 carbon atoms;

[0231] L31is a straight-chained alkylene group, wherein the straight-chained alkylene group optionally includes a single nitrogen atom in its carbon skeleton, wherein the atom of L31that is directly attached to the carbon atom of the carbonyl group of -CO-L31-NR31R32is a carbon atom, wherein the atom of L31that is directly attached to the nitrogen atom of -NR31R32is a carbon atom, wherein L31has a chain length of from 2 to 5 atoms, and wherein L31may optionally be substituted with one or more fluoro groups and / or one or two groups RL3;

[0232] R31is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group;

[0233] R32is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group; and each RL3is independently selected from a methyl or fluoromethyl group; or any two RL3may, together with the atom or atoms to which they are attached, form a 3- to 6-membered saturated monocyclic group, wherein the 3- to 6- membered saturated monocyclic group may optionally be substituted with one or more fluoro groups and / or a single oxo ( = 0) group and / or one or two groups RL4; or any RL3and R31may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group and / or one or two groups RL4; or R31and R32may, together with the nitrogen atom to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group and / or one or two groups RL4; each RL4is independently selected from a methyl or a fluoromethyl group;

[0234] R4is selected from hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R400group; and

[0235] R400is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group.

[0236] More typically, there is provided an embodiment wherein :

[0237] R3has the formula -CO-L31-NR31R32, provided that the group -CO-L31-NR31R32contains no more than 8 carbon atoms;

[0238] L31is a C2-C5 straight-chained alkylene group or a -CH2CH2-NH-CH2CH2- group, wherein the alkylene or the -CH2CH2-NH-CH2CH2- group may optionally be substituted with one or more fluoro groups and / or one or two groups RL3;

[0239] R31is hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl or fluorocyclopropylmethyl group;

[0240] R32is hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl or fluorocyclopropylmethyl group; and each RL3is independently selected from a methyl or fluoromethyl group; or any RL3and R31may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups; or R31and R32may, together with the nitrogen atom to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups; and

[0241] R4is selected from hydrogen or a methyl or fluoromethyl group.

[0242] Typically in such an embodiment:

[0243] R31is hydrogen or a methyl or fluoromethyl group; and

[0244] R32is hydrogen or a methyl or fluoromethyl group; or any RL3and R31may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups; or R31and R32may, together with the nitrogen atom to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups; and

[0245] R4is hydrogen.

[0246] For instance, -NR3R4may have the formula:

[0247] In a further embodiment, R3has the formula -CO-NR41-L32-NR31R32, wherein :

[0248] L32is a C2-C4 straight-chained alkylene group, wherein the alkylene group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL3;

[0249] R31is hydrogen or a C1-C6 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups, and wherein the saturated hydrocarbyl group may optionally include one or two heteroatoms each independently selected from N and O in its carbon skeleton;

[0250] R32is hydrogen or a C1-C6 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups, and wherein the saturated hydrocarbyl group may optionally include one or two heteroatoms each independently selected from N, O and S in its carbon skeleton, wherein any -S- moiety in the saturated hydrocarbyl group may optionally be substituted with one or two groups each independently selected from oxo (=0) and =NH to form a -SO-, -SO2-, -S( = NH)- or -SO( = NH)- moiety;

[0251] R41is hydrogen or a C1-C6 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups, and wherein the saturated hydrocarbyl group may optionally include one or two heteroatoms each independently selected from N and O in its carbon skeleton; and each RL3is independently selected from a methyl or fluoromethyl group; or any RL3and R31may, together with the atoms to which they are attached, form a 3- to 7-membered saturated monocyclic heterocyclic group, wherein the 3- to 7-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL4; or any RL3and R41may, together with the atoms to which they are attached, form a 3- to 7-membered saturated monocyclic heterocyclic group, wherein the 3- to 7-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL4; or any R31and R41may, together with the atoms to which they are attached, form a 6- or 7-membered saturated monocyclic heterocyclic group, wherein the 6- or 7-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL4; or R31and R32may, together with the nitrogen atom to which they are attached, form a 3- to 7-membered saturated monocyclic heterocyclic group, wherein the 3- to 7-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL4; or any R31, R32and R41may, together with the atoms to which they are attached, form a 7- to 10-membered saturated bicyclic heterocyclic group, wherein the 7- to 10-membered saturated bicyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL4; or any RL3, R31and R32may, together with the atoms to which they are attached, form a 7- to 10-membered saturated bicyclic heterocyclic group, wherein the 7- to 10-membered saturated bicyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL4; or any RL3, R31and R41may, together with the atoms to which they are attached, form a 7- to 10-membered saturated bicyclic heterocyclic group, wherein the 7- to 10-membered saturated bicyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL4; and each RL4is independently selected from a methyl or a fluoromethyl group; provided that the group -CO-NR41-L32-NR31R32contains no more than 12 carbon atoms.

[0252] As will be understood, in such an embodiment, the compound is a compound of Formula (VII) :

[0253] Formula (VII) wherein R1, R2, Xx-X4, Ax-A6, Q1, L32, R4, R31, R32and R41are as defined in accordance with Formula (I).

[0254] Typically, the group -CO-NR41-L32-NR31R32contains no more than 10 carbon atoms. Typically where R3has the formula -CO-NR41-L32-NR31R32, L32is a C2-C4 straight- chained alkylene group, wherein the alkylene group may optionally be substituted with one or more fluoro groups and / or one or two groups RL3.

[0255] Typically where R3has the formula -CO-NR41-L32-NR31R32:

[0256] R31is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group;

[0257] R32is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group;

[0258] R41is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group; and each RL3is independently selected from a methyl or fluoromethyl group; or any RL3and R31may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group and / or one or two groups RL4; or any RL3and R41may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group and / or one or two groups RL4; or R31and R41may, together with the atoms to which they are attached, form a piperazinyl group, wherein the piperazinyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group and / or one or two groups RL4; or R31and R32may, together with the nitrogen atom to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group and / or one or two groups RL4; and each RL4is independently selected from a methyl or a fluoromethyl group. More typically where R3has the formula -CO-NR41-L32-NR31R32:

[0259] R31is hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl or fluorocyclopropylmethyl group;

[0260] R32is hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl or fluorocyclopropylmethyl group;

[0261] R41is hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl or fluorocyclopropylmethyl group; and each RL3is independently selected from a methyl or fluoromethyl group; or any RL3and R31may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups; or any RL3and R41may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups; or R31and R41may, together with the atoms to which they are attached, form a piperazinyl group, wherein the piperazinyl group may optionally be substituted with one or more fluoro groups; or R31and R32may, together with the nitrogen atom to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups.

[0262] Typically where R3has the formula -CO-NR41-L32-NR31R32, R4is selected from hydrogen or a C1-C4 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the saturated hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton. More typically, R4is selected from hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R400group, wherein R400is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group. More typically still, R4is selected from hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl or fluorocyclopropylmethyl group. For example, R4may be selected from hydrogen or a C1-C4 alkyl or C1-C4 fluoroalkyl group. Yet more typically, R4is selected from hydrogen or a methyl or fluoromethyl group. Most typically, R4is hydrogen.

[0263] Thus, there is provided an embodiment wherein :

[0264] R3has the formula -CO-NR41-L32-NR31R32, provided that the group -CO-NR41-L32-NR31R32contains no more than 10 carbon atoms;

[0265] L32is a C2-C4 straight-chained alkylene group, wherein the alkylene group may optionally be substituted with one or more fluoro groups and / or one or two groups RL3;

[0266] R31is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group;

[0267] R32is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group;

[0268] R41is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group; and each RL3is independently selected from a methyl or fluoromethyl group; or any RL3and R31may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group and / or one or two groups RL4; or any RL3and R41may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group and / or one or two groups RL4; or R31and R41may, together with the atoms to which they are attached, form a piperazinyl group, wherein the piperazinyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group and / or one or two groups RL4; or R31and R32may, together with the nitrogen atom to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group and / or one or two groups RL4; each RL4is independently selected from a methyl or a fluoromethyl group;

[0269] R4is selected from hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R400group; and

[0270] R400is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group.

[0271] More typically, there is provided an embodiment wherein:

[0272] R3has the formula -CO-NR41-L32-NR31R32, provided that the group -CO-NR41-L32-NR31R32contains no more than 10 carbon atoms;

[0273] L32is a C2-C4 straight-chained alkylene group, wherein the alkylene group may optionally be substituted with one or more fluoro groups and / or one or two groups RL3;

[0274] R31is hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl or fluorocyclopropylmethyl group;

[0275] R32is hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl or fluorocyclopropylmethyl group;

[0276] R41is hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl or fluorocyclopropylmethyl group; and each RL3is independently selected from a methyl or fluoromethyl group; or any RL3and R31may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups; or any RL3and R41may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups; or R31and R41may, together with the atoms to which they are attached, form a piperazinyl group, wherein the piperazinyl group may optionally be substituted with one or more fluoro groups; and

[0277] R4is selected from hydrogen or a methyl or fluoromethyl group.

[0278] Typically in such an embodiment:

[0279] R31is hydrogen or a methyl or fluoromethyl group; R32is hydrogen or a methyl or fluoromethyl group;

[0280] R41is hydrogen or a methyl or fluoromethyl group; or any RL3and R31may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups; or any RL3and R41may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups; or R31and R41may, together with the atoms to which they are attached, form a piperazinyl group, wherein the piperazinyl group may optionally be substituted with one or more fluoro groups; and

[0281] R4is hydrogen.

[0282] For instance, -NR3R4may have the formula:

[0283] In another embodiment, R3has the formula -CO-L36-OR35, wherein:

[0284] L36is a straight-chained alkylene group, wherein the straight-chained alkylene group optionally includes a single heteroatom independently selected from O and N in its carbon skeleton, wherein L36has a chain length of from 2 to 5 atoms, and wherein L36may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL3;

[0285] R35is hydrogen or a C1-C6 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups, and wherein the saturated hydrocarbyl group may optionally include one or two heteroatoms each independently selected from N and O in its carbon skeleton; each RL3is independently selected from a methyl or fluoromethyl group; or any two RL3may, together with the atom or atoms to which they are attached, form a 3- to 7-membered saturated monocyclic group, wherein the 3- to 7- membered saturated monocyclic group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL4; or any RL3and R35may, together with the atoms to which they are attached, form a 3- to 7-membered saturated monocyclic heterocyclic group, wherein the 3- to 7-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL4; or any two RL3and R35may, together with the atoms to which they are attached, form a 7- to 10-membered saturated bicyclic heterocyclic group, wherein the 7- to 10-membered saturated bicyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL4; and each RL4is independently selected from a methyl or a fluoromethyl group; provided that the group -CO-L36-OR35contains no more than 12 carbon atoms.

[0286] As will be understood, in such an embodiment, the compound is a compound of Formula (VIII) :

[0287] Formula (VIII) wherein R1, R2, Xx-X4, Ax-A6, Q1, R4, L36and R35are as defined in accordance with Formula (I).

[0288] Typically, the group -CO-L36-OR35contains no more than 10 carbon atoms. More typically, the group -CO-L36-OR35contains no more than 8 carbon atoms. In one aspect of such an embodiment:

[0289] L36is a C1-C3 straight-chained alkylene group, wherein the alkylene group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group and / or one, two, three or four groups RL35; each RL35is independently selected from a methyl or a fluoromethyl group; and R35is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group; or any RL35and R35together form a C2-C4 straight-chained alkylene group, wherein the alkylene group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group and / or one, two, three or four groups R36; and each R36is independently selected from a methyl or a fluoromethyl group; provided that the group -CO-L36-OR35contains no more than 8 carbon atoms and that the group -CO-L36-OR35contains no more than three oxo (=0) groups.

[0290] Typically in such an aspect, R4is selected from hydrogen or a C1-C4 alkyl or C1-C4 fluoroalkyl group. More typically, R4is hydrogen.

[0291] In another aspect of such an embodiment, R3has the formula -CO-L36-OR35, wherein :

[0292] L36is a C1-C3 straight-chained alkylene group, wherein the alkylene group may optionally be substituted with one or more fluoro groups and / or one, two, three or four groups RL35; each RL35is independently selected from a methyl or a fluoromethyl group; and R35is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups; or any RL35and R35together form a C2-C4 straight-chained alkylene group, wherein the alkylene group may optionally be substituted with one or more fluoro groups and / or one, two, three or four groups R36; and each R36is independently selected from a methyl or a fluoromethyl group; provided that the group -CO-L36-OR35contains no more than 8 carbon atoms.

[0293] Typically in such an aspect, R4is selected from hydrogen or a C1-C3 alkyl or C1-C3 fluoroalkyl group. More typically, R4is hydrogen.

[0294] Typically where R3has the formula -CO-L36-OR35, L36is a straight-chained alkylene group, wherein the straight-chained alkylene group optionally includes a single nitrogen atom in its carbon skeleton, wherein L36has a chain length of from 2 to 5 atoms, and wherein L36may optionally be substituted with one or more fluoro groups and / or one or two groups RL3. Typically, the atom of L36that is directly attached to the carbon atom of the carbonyl group of -CO-L36-OR35is a carbon atom. Typically, the atom of L36that is directly attached to the oxygen atom of -OR35is a carbon atom. More typically, where R3has the formula -CO-L36-OR35, L36is a C2-C5 straight-chained alkylene group or a -CH2CH2-NH-CH2CH2- group, wherein the alkylene or the -CH2CH2-NH-CH2CH2- group may optionally be substituted with one or more fluoro groups and / or one or two groups RL3.

[0295] Typically where R3has the formula -CO-L36-OR35:

[0296] R35is a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group; and each RL3is independently selected from a methyl or fluoromethyl group; or any two RL3may, together with the atom or atoms to which they are attached, form a 3- to 6-membered saturated monocyclic group, wherein the 3- to 6- membered saturated monocyclic group may optionally be substituted with one or more fluoro groups and / or a single oxo ( = 0) group and / or one or two groups RL4; or any RL3and R35may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group and / or one or two groups RL4; and each RL4is independently selected from a methyl or a fluoromethyl group.

[0297] More typically where R3has the formula -CO-L36-OR35:

[0298] R35is a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl or fluorocyclopropylmethyl group; and each RL3is independently selected from a methyl or fluoromethyl group; or any RL3and R35may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups.

[0299] Typically where R3has the formula -CO-L36-OR35, R4is selected from hydrogen or a Ci- C4 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the saturated hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton.

[0300] Thus, there is provided an embodiment wherein :

[0301] R3has the formula -CO-L36-OR35, provided that the group -CO-L36-OR35contains no more than 10 carbon atoms;

[0302] L36is a straight-chained alkylene group, wherein the straight-chained alkylene group optionally includes a single nitrogen atom in its carbon skeleton, wherein the atom of L36that is directly attached to the carbon atom of the carbonyl group of -CO-L36-OR35is a carbon atom, wherein the atom of L36that is directly attached to the oxygen atom of -OR35is a carbon atom, wherein L36has a chain length of from 2 to 5 atoms, and wherein L36may optionally be substituted with one or more fluoro groups and / or one or two groups RL3;

[0303] R35is a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group; and each RL3is independently selected from a methyl or fluoromethyl group; or any two RL3may, together with the atom or atoms to which they are attached, form a 3- to 6-membered saturated monocyclic group, wherein the 3- to 6- membered saturated monocyclic group may optionally be substituted with one or more fluoro groups and / or a single oxo ( = 0) group and / or one or two groups RL4; or any RL3and R35may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group and / or one or two groups RL4; each RL4is independently selected from a methyl or a fluoromethyl group; and R4is selected from hydrogen or a C1-C4 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the saturated hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton . In one embodiment, where R3has the formula -CO-L36-OR35, R4is selected from hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R400group, wherein R400is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group. More typically still, R4is selected from hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl or fluorocyclopropylmethyl group. For example, R4may be selected from hydrogen or a C1-C4 alkyl or C1-C4 fluoroalkyl group. Yet more typically, R4is selected from hydrogen or a methyl or fluoromethyl group. Most typically in such an embodiment, R4is hydrogen.

[0304] In another embodiment, where R3has the formula -CO-L36-OR35, R4is a -CH2CH2N(R44)2group, wherein each R44is independently selected from hydrogen or a methyl or fluoromethyl group.

[0305] More typically, there is provided an embodiment wherein :

[0306] R3has the formula -CO-L36-OR35, provided that the group -CO-L36-OR35contains no more than 8 carbon atoms;

[0307] L36is a C2-Cs straight-chained alkylene group or a -CH2CH2-NH-CH2CH2- group, wherein the alkylene or the -CH2CH2-NH-CH2CH2- group may optionally be substituted with one or more fluoro groups and / or one or two groups RL3;

[0308] R35is a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl or fluorocyclopropylmethyl group; and each RL3is independently selected from a methyl or fluoromethyl group; or any RL3and R35may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups;

[0309] R4is selected from hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl, -CO-R400or -CH2CH2N(R44)2group;

[0310] R400is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group; and each R44is independently selected from hydrogen or a methyl or fluoromethyl group.

[0311] In one aspect of such an embodiment:

[0312] L36is a C2-Cs straight-chained alkylene group or a -CH2CH2-NH-CH2CH2- group, wherein the alkylene or the -CH2CH2-NH-CH2CH2- group is substituted with one group RL3, and wherein the alkylene or the -CH2CH2-NH-CH2CH2- group may optionally be further substituted with one or more fluoro groups;

[0313] RL3and R35together with the atoms to which they are attached, form a 5- or 6- membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups; and

[0314] R4is hydrogen.

[0315] For instance, -NR3R4may have the formula :

[0316] In another aspect of such an embodiment:

[0317] L36is a C2-C5 straight-chained alkylene group or a -CH2CH2-NH-CH2CH2- group, wherein the alkylene or the -CH2CH2-NH-CH2CH2- group is substituted with one group RL3, and wherein the alkylene or the -CH2CH2-NH-CH2CH2- group may optionally be further substituted with one or more fluoro groups;

[0318] RL3and R35together with the atoms to which they are attached, form a 5- or 6- membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups;

[0319] R4is a -CH2CH2N(R44)2 group; and each R44is independently selected from hydrogen or a methyl or fluoromethyl group.

[0320] For instance, -NR3R4may have the formula :

[0321] In a further embodiment, R3is selected from hydrogen or a C1-C12 saturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include one or two cyclic groups, wherein the hydrocarbyl group may optionally be substituted with one or more fluoro groups, and wherein the hydrocarbyl group may optionally include one, two, three or four heteroatoms each independently selected from N and O in its carbon skeleton, and R4may be selected from hydrogen or a C1-C4 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the saturated hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton.

[0322] More typically in such an embodiment, R3is a C1-C10 saturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more fluoro groups, and wherein the hydrocarbyl group may optionally include one or two heteroatoms each independently selected from N and O in its carbon skeleton, and R4may be selected from hydrogen or a C1-C4 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the saturated hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton.

[0323] In another embodiment, R3is a C2-C8 saturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more fluoro groups, wherein the hydrocarbyl group includes one or two heteroatoms each independently selected from N and O in its carbon skeleton, and R4is selected from hydrogen or a C1-C4 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the saturated hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton. Typically in such an embodiment, R4is selected from hydrogen or a C1-C3 alkyl or C1-C3 fluoroalkyl group.

[0324] In one embodiment, R3has the formula -L3-NR31R32, wherein :

[0325] L3is a straight-chained alkylene group, wherein the straight-chained alkylene group optionally includes a single heteroatom independently selected from O and N in its carbon skeleton, wherein L3has a chain length of from 2 to 6 atoms, and wherein L3may optionally be substituted with one or more fluoro groups and / or one, two, three or four groups RL3;

[0326] R31is hydrogen or a C1-C6 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups, and wherein the saturated hydrocarbyl group may optionally include one or two heteroatoms each independently selected from N and O in its carbon skeleton;

[0327] R32is hydrogen or a C1-C6 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups, and wherein the saturated hydrocarbyl group may optionally include one or two heteroatoms each independently selected from N and O in its carbon skeleton; each RL3is independently selected from a methyl or fluoromethyl group; or any two RL3may, together with the atom or atoms to which they are attached, form a 3- to 7-membered saturated monocyclic group, wherein the 3- to 7- membered saturated monocyclic group may optionally be substituted with one or more fluoro groups and / or one, two, three or four groups RL4; or any RL3and R31may, together with the atoms to which they are attached, form a 3- to 7-membered saturated monocyclic heterocyclic group, wherein the 3- to 7-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one, two, three or four groups RL4; or R31and R32may, together with the nitrogen atom to which they are attached, form a 3- to 7-membered saturated monocyclic heterocyclic group, wherein the 3- to 7-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one, two, three or four groups RL4; or any two RL3and R31may, together with the atoms to which they are attached, form a 7- to 10-membered saturated bicyclic heterocyclic group, wherein the 7- to 10-membered saturated bicyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one, two, three or four groups RL4; or any RL3, R31and R32may, together with the atoms to which they are attached, form a 7- to 10-membered saturated bicyclic heterocyclic group, wherein the 7- to 10-membered saturated bicyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one, two, three or four groups RL4; and each RL4is independently selected from a methyl or a fluoromethyl group; provided that the group -L3-NR31R32contains no more than 12 carbon atoms. Typically, the group -L3-NR31R32contains no more than 10 carbon atoms. More typically, the group -L3-NR31R32contains no more than 8 carbon atoms.

[0328] In one aspect of such an embodiment, R3has the formula -L3-NR31R32, wherein :

[0329] L3is a C2-C4 straight-chained alkylene group, wherein the alkylene group may optionally be substituted with one or more fluoro groups and / or one, two, three or four groups RL3; each RL3is independently selected from a methyl or a fluoromethyl group; R31is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups; and

[0330] R32is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups; or R31and R32together form a C2-C6 straight-chained alkylene group, wherein the alkylene group may optionally be substituted with one or more fluoro groups and / or one, two, three or four groups R33; each R33is independently selected from a methyl or a fluoromethyl group; or any RL3and R31, or any RL3and R32, together form a C2-C4 straight-chained alkylene group, wherein the alkylene group may optionally be substituted with one or more fluoro groups and / or one, two, three or four groups R34; and each R34is independently selected from a methyl or a fluoromethyl group; provided that the group -L3-NR31R32contains no more than 8 carbon atoms.

[0331] Typically in such aspect, R4is selected from hydrogen or a C1-C3 alkyl or C1-C3 fluoroalkyl group. More typically, R4is hydrogen.

[0332] Typically in the embodiments directly above where R3has the formula -L3-NR31R32, L3is a straight-chained alkylene group, wherein the straight-chained alkylene group optionally includes a single nitrogen atom in its carbon skeleton, wherein L3has a chain length of from 2 to 5 atoms, and wherein L3may optionally be substituted with one or more fluoro groups and / or one or two groups RL3. Typically, the atom of L3that is directly attached to the nitrogen atom of -NR4- is a carbon atom. Typically, the atom of L3that is directly attached to the nitrogen atom of -NR31R32is a carbon atom. More typically, where R3has the formula -L3-NR31R32, L3is a C2-C5 straight-chained alkylene group or a -CH2CH2-NH-CH2CH2- group, wherein the alkylene or the -CH2CH2-NH-CH2CH2- group may optionally be substituted with one or more fluoro groups and / or one or two groups RL3. More typically still, L3is a C2-C4 straight-chained alkylene group, wherein the alkylene group may optionally be substituted with one or more fluoro groups and / or one or two groups RL3.

[0333] Typically in the embodiments directly above where R3has the formula -L3-NR31R32:

[0334] R31is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups;

[0335] R32is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups; and each RL3is independently selected from a methyl or fluoromethyl group; or any two RL3may, together with the atom or atoms to which they are attached, form a 3- to 6-membered saturated monocyclic group, wherein the 3- to 6- membered saturated monocyclic group may optionally be substituted with one or more fluoro groups and / or one or two groups RL4; or any RL3and R31may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one or two groups RL4; or R31and R32may, together with the nitrogen atom to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one or two groups RL4; and each RL4is independently selected from a methyl or a fluoromethyl group.

[0336] More typically in the embodiments directly above where R3has the formula -L3-NR31R32:

[0337] R31is hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl or fluorocyclopropylmethyl group;

[0338] R32is hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl or fluorocyclopropylmethyl group; and each RL3is independently selected from a methyl or fluoromethyl group; or any RL3and R31may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups; or R31and R32may, together with the nitrogen atom to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups.

[0339] Typically in the embodiments directly above where R3has the formula -L3-NR31R32, R4is selected from hydrogen or a C1-C4 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the saturated hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton . More typically, R4is selected from hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R400group, wherein R400is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group. More typically still, R4is selected from hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl or fluorocyclopropylmethyl group. For example, R4may be selected from hydrogen or a C1-C4 alkyl or C1-C4 fluoroalkyl group. Yet more typically, R4is selected from hydrogen or a methyl or fluoromethyl group. Most typically, R4is hydrogen.

[0340] Thus, there is provided an embodiment wherein :

[0341] R3has the formula -L3-NR31R32, provided that the group -L3-NR31R32contains no more than 10 carbon atoms;

[0342] L3is a straight-chained alkylene group, wherein the straight-chained alkylene group optionally includes a single nitrogen atom in its carbon skeleton, wherein the atom of L3that is directly attached to the nitrogen atom of -NR4- is a carbon atom, wherein the atom of L3that is directly attached to the nitrogen atom of -NR31R32is a carbon atom, wherein L3has a chain length of from 2 to 5 atoms, and wherein L3may optionally be substituted with one or more fluoro groups and / or one or two groups RL3;

[0343] R31is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups;

[0344] R32is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups; and each RL3is independently selected from a methyl or fluoromethyl group; or any two RL3may, together with the atom or atoms to which they are attached, form a 3- to 6-membered saturated monocyclic group, wherein the 3- to 6- membered saturated monocyclic group may optionally be substituted with one or more fluoro groups and / or one or two groups RL4; or any RL3and R31may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one or two groups RL4; or R31and R32may, together with the nitrogen atom to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one or two groups RL4; each RL4is independently selected from a methyl or a fluoromethyl group;

[0345] R4is selected from hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R400group; and

[0346] R400is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group.

[0347] More typically, there is provided an embodiment wherein :

[0348] R3has the formula -L3-NR31R32, provided that the group -L3-NR31R32contains no more than 8 carbon atoms;

[0349] L3is a C2-C4 straight-chained alkylene group, wherein the alkylene group may optionally be substituted with one or more fluoro groups and / or one or two groups RL3;

[0350] R31is hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl or fluorocyclopropylmethyl group;

[0351] R32is hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl or fluorocyclopropylmethyl group; and each RL3is independently selected from a methyl or fluoromethyl group; or any RL3and R31may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups; or R31and R32may, together with the nitrogen atom to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups; and R4is selected from hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R400group; and

[0352] R400is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group.

[0353] Typically in such an embodiment:

[0354] R31is hydrogen or a methyl or fluoromethyl group; and

[0355] R32is hydrogen or a methyl or fluoromethyl group; or any RL3and R31may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups.

[0356] For instance, -NR3R4may have the formula:

[0357] In one embodiment, R3has the formula -L35-OR35, wherein :

[0358] L35is a straight-chained alkylene group, wherein the straight-chained alkylene group optionally includes a single heteroatom independently selected from O and N in its carbon skeleton, wherein L35has a chain length of from 2 to 6 atoms, and wherein L35may optionally be substituted with one or more fluoro groups and / or one, two, three or four groups RL35;

[0359] R35is hydrogen or a C1-C6 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups, and wherein the saturated hydrocarbyl group may optionally include one or two heteroatoms each independently selected from N and O in its carbon skeleton; each RL35is independently selected from a methyl or fluoromethyl group; or any two RL35may, together with the atom or atoms to which they are attached, form a 3- to 7-membered saturated monocyclic group, wherein the 3- to 7- membered saturated monocyclic group may optionally be substituted with one or more fluoro groups and / or one, two, three or four groups R36; or any RL35and R35may, together with the atoms to which they are attached, form a 3- to 7-membered saturated monocyclic heterocyclic group, wherein the 3- to 7-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one, two, three or four groups RL4; or any two RL35and R35may, together with the atoms to which they are attached, form a 7- to 10-membered saturated bicyclic heterocyclic group, wherein the 7- to 10-membered saturated bicyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one, two, three or four groups R36; and each R36is independently selected from a methyl or a fluoromethyl group; provided that the group -L35-OR35contains no more than 12 carbon atoms.

[0360] Typically, the group -L35-OR35contains no more than 10 carbon atoms. More typically, the group -L35-OR35contains no more than 8 carbon atoms.

[0361] In one aspect of such an embodiment, R3has the formula -L35-OR35, wherein :

[0362] L35is a C2-C4 straight-chained alkylene group, wherein the alkylene group may optionally be substituted with one or more fluoro groups and / or one, two, three or four groups RL35; each RL35is independently selected from a methyl or a fluoromethyl group; and R35is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups; or any RL35and R35together form a C2-C4 straight-chained alkylene group, wherein the alkylene group may optionally be substituted with one or more fluoro groups and / or one, two, three or four groups R36; and each R36is independently selected from a methyl or a fluoromethyl group; provided that the group -L35-OR35contains no more than 8 carbon atoms.

[0363] Typically in such an aspect, R4is selected from hydrogen or a C1-C3 alkyl or C1-C3 fluoroalkyl group. More typically, R4is hydrogen.

[0364] Typically in the embodiments directly above where R3has the formula -L35-OR35, L35is a straight-chained alkylene group, wherein the straight-chained alkylene group optionally includes a single heteroatom independently selected from O and N in its carbon skeleton, wherein L35has a chain length of from 2 to 5 atoms, and wherein L3 may optionally be substituted with one or more fluoro groups and / or one or two groups RL35. Typically, the atom of L35that is directly attached to the nitrogen atom of -NR4- is a carbon atom. Typically, the atom of L35that is directly attached to the oxygen atom of -OR35is a carbon atom. More typically, where R3has the formula -L35-OR35, L35is a C2-C5 straight-chained alkylene group or a -CH2CH2-NH-CH2CH2- or -CH2CH2-O-CH2CH2- group, wherein the alkylene or the -CH2CH2-NH-CH2CH2- or the -CH2CH2-O-CH2CH2- group may optionally be substituted with one or more fluoro groups and / or one or two groups RL35. More typically still, L35is a C2-C4 straight- chained alkylene group, wherein the alkylene group may optionally be substituted with one or more fluoro groups and / or one or two groups RL35.

[0365] Typically in the embodiments directly above where R3has the formula -L35-OR35:

[0366] R35is a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups; and each RL35is independently selected from a methyl or fluoromethyl group; or any two RL35may, together with the atom or atoms to which they are attached, form a 3- to 6-membered saturated monocyclic group, wherein the 3- to 6- membered saturated monocyclic group may optionally be substituted with one or more fluoro groups and / or one or two groups R36; or any RL35and R35may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one or two groups R36; and each R36is independently selected from a methyl or a fluoromethyl group.

[0367] More typically in the embodiments directly above where R3has the formula -L35-OR35: R35is a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl or fluorocyclopropylmethyl group; and each RL35is independently selected from a methyl or fluoromethyl group; or any RL35and R35may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups.

[0368] Typically in the embodiments directly above where R3has the formula -L35-OR35, R4is selected from hydrogen or a C1-C4 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the saturated hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton. More typically, R4is selected from hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R400group, wherein R400is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group. More typically still, R4is selected from hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl or fluorocyclopropylmethyl group. For example, R4may be selected from hydrogen or a C1-C4 alkyl or C1-C4 fluoroalkyl group. Yet more typically, R4is selected from hydrogen or a methyl or fluoromethyl group. Most typically, R4is hydrogen.

[0369] Thus, there is provided an embodiment wherein :

[0370] R3has the formula -L35-OR35, provided that the group -L35-OR35contains no more than 10 carbon atoms;

[0371] L35is a straight-chained alkylene group, wherein the straight-chained alkylene group optionally includes a single heteroatom independently selected from O and N in its carbon skeleton, wherein the atom of L35that is directly attached to the nitrogen atom of -NR4- is a carbon atom, wherein the atom of L35that is directly attached to the oxygen atom of -OR35is a carbon atom, wherein L35has a chain length of from 2 to 5 atoms, and wherein L35may optionally be substituted with one or more fluoro groups and / or one or two groups RL35;

[0372] R35is a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups; and each RL35is independently selected from a methyl or fluoromethyl group; or any two RL35may, together with the atom or atoms to which they are attached, form a 3- to 6-membered saturated monocyclic group, wherein the 3- to 6- membered saturated monocyclic group may optionally be substituted with one or more fluoro groups and / or one or two groups R36; or any RL35and R35may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one or two groups R36; each R36is independently selected from a methyl or a fluoromethyl group; R4is selected from hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R400group; and

[0373] R400is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group.

[0374] More typically, there is provided an embodiment wherein:

[0375] R3has the formula -L35-OR35, provided that the group -L35-OR35contains no more than 8 carbon atoms;

[0376] L35is a C2-C4 straight-chained alkylene group, wherein the alkylene group may optionally be substituted with one or more fluoro groups and / or one or two groups RL35;

[0377] R35is a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl or fluorocyclopropylmethyl group; and each RL35is independently selected from a methyl or fluoromethyl group; or any RL35and R35may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups; and

[0378] R4is selected from hydrogen or a methyl or fluoromethyl group.

[0379] In another embodiment, R3has the formula -L30-R30, wherein :

[0380] L30is a bond or a C1-C4 straight-chained alkylene group, wherein the alkylene group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL30; each RL30is independently selected from a methyl or a fluoromethyl group; and R30is a phenyl or a 5- or 6-membered heteroaryl group, wherein the phenyl or the 5- or 6-membered heteroaryl group may optionally be substituted with one or more groups each independently selected from a fluoro, chloro, bromo, -OH, -NH2, -R301, -OR301, -NHR301or -N(R301)2 group, wherein each R301group is independently selected from a Ci-Cs saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more halo and / or -NO2 groups, and wherein the hydrocarbyl group may optionally include one, two, three or four heteroatoms each independently selected from N and O in its carbon skeleton, or wherein any two R301groups attached to the same nitrogen atom may together with the nitrogen atom to which they are attached form a 3- to 7- membered monocyclic heterocyclic group, wherein the monocyclic heterocyclic group may optionally be substituted with one or more substituents each independently selected from a halo, oxo ( = 0), -OH, -NH2, -NO2 or a C1-C4 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the saturated hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton; provided that the group -L30-R30contains no more than 12 carbon atoms.

[0381] As will be understood, in such an embodiment, the compound is a compound of Formula (IX) :

[0382] Formula (IX) wherein R1, R2, Xx-X4, Ax-A6, Q1, R4, L30and R30are as defined in accordance with Formula (I).

[0383] Typically, the group -|_30-R30contains no more than 10 carbon atoms. More typically, the group -|_30-R30contains no more than 8 carbon atoms.

[0384] In one aspect of such an embodiment:

[0385] L30is a C1-C4 straight-chained alkylene group, wherein the alkylene group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL30; and each R301group is independently selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group, provided that any -N(R301)2 group contains no more than four carbon atoms.

[0386] Typically in such an aspect, R30is a phenyl or a 5- or 6-membered heteroaryl group, wherein the phenyl or the 5- or 6-membered heteroaryl group may optionally be substituted with one or more groups each independently selected from a fluoro, chloro, bromo, methyl or fluoromethyl group. Typically in such an aspect, R4is selected from hydrogen or a C1-C4 alkyl or C1-C4 fluoroalkyl group. More typically, R4is hydrogen.

[0387] In one embodiment, L30is a bond.

[0388] In another embodiment, L30is a C1-C4 straight-chained alkylene group, wherein the alkylene group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL30. Typically in such an embodiment, L30is a C1-C2 straight-chained alkylene group, wherein the alkylene group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group and / or one or two groups RL30. For example, in one aspect of such an embodiment, R3has the formula -CO-L31-R30, wherein L31is a -CH2-, -CHMe- or -CMe?- group, wherein any -CH2-, -CHMe- or -CMe2- group may optionally be fluoro substituted, and wherein R30is as defined above. Most typically in such an embodiment, R3has the formula -CO-CH2-R30.

[0389] In one embodiment, R30is a 5- or 6-membered heteroaryl group, wherein the 5- or 6- membered heteroaryl group may optionally be substituted with one, two, three or four groups each independently selected from a fluoro, chloro, bromo, methyl or fluromethyl group.

[0390] Typically, R30is a phenyl or a 5- or 6-membered heteroaryl group, wherein the phenyl or the 5- or 6-membered heteroaryl group may optionally be substituted with one or more fluoro, chloro and / or bromo groups, and / or with one or two groups each independently selected from a -OH, -NH2, -R301, -OR301, -NHR301or -N(R301)2 group. Typically, R30is a 5- or 6-membered heteroaryl group, wherein the 5- or 6-membered heteroaryl group contains at least one ring nitrogen, or R30is a phenyl or a 5- or 6- membered heteroaryl group, wherein the phenyl or the 5- or 6-membered heteroaryl group is substituted with at least one group selected from a -NH2, -NHR301or -N(R301)2 group. For example, R30may be selected from :

[0391] (i) a 5- or 6-membered heteroaryl group, wherein the 5- or 6-membered heteroaryl group contains at least one ring nitrogen atom, and wherein the 5- or 6- membered heteroaryl group may optionally be substituted with one or more fluoro, chloro and / or bromo groups, and / or with a single group independently selected from a -OH, -NH2, -R301, -OR301, -NHR301or -N(R301)2group; or

[0392] (ii) a phenyl or a 5- or 6-membered heteroaryl group, wherein the phenyl or the 5- or 6-membered heteroaryl group is substituted with a single -NH2, -NHR301or -N(R301)2group, and wherein the phenyl or the 5- or 6-membered heteroaryl group may optionally be further substituted with one or more fluoro, chloro and / or bromo groups.

[0393] In one embodiment, each R301group is independently selected from a -CO-R302, -CH2-R302, -CHMe-R302, -CMe2-R302, or a C1-C6 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups, and wherein the saturated hydrocarbyl group may optionally include one or two heteroatoms each independently selected from N and O in its carbon skeleton, and wherein R302is selected from a phenyl or a 5- or 6-membered heteroaryl group, wherein the phenyl or the 5- or 6-membered heteroaryl group may optionally be substituted with one or more fluoro, chloro and / or bromo groups, or any two R301groups attached to the same nitrogen atom may together with the nitrogen atom to which they are attached form a 3- to 7-membered saturated monocyclic heterocyclic group, wherein saturated the monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four methyl groups, wherein any methyl group may optionally be fluoro substituted.

[0394] More typically, each R301group is independently selected from a -CO-R302, -CH2-R302or a C1-C4 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the saturated hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton, or any two R301groups attached to the same nitrogen atom may together with the nitrogen atom to which they are attached form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein saturated the monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group.

[0395] More typically still, each R301group is independently selected from a -CH2-R302or a Ci- C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups. For example, each R301group may be independently selected from a methyl, fluoromethyl or benzyl group. Typically where R3has the formula -L30-R30, R4is selected from hydrogen or a C1-C4 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the saturated hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton. More typically, R4is selected from hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R400group, wherein R400is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group. More typically still, R4is selected from hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl or fluorocyclopropylmethyl group. For example, R4may be selected from hydrogen or a C1-C3 alkyl or C1-C3 fluoroalkyl group. Yet more typically, R4is selected from hydrogen or a methyl or fluoromethyl group. Most typically, R4is hydrogen.

[0396] Thus, there is provided an embodiment wherein :

[0397] R3has the formula -L30-R30, wherein :

[0398] L30is a bond or a C1-C2 straight-chained alkylene group, wherein the alkylene group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group and / or one or two groups RL30; each RL30is independently selected from a methyl or a fluoromethyl group;

[0399] R30is a phenyl or a 5- or 6-membered heteroaryl group, wherein the phenyl or the 5- or 6-membered heteroaryl group may optionally be substituted with one or more fluoro, chloro and / or bromo groups, and / or with one or two groups each independently selected from a -OH, -NH2, -R301, -OR301, -NHR301or -N(R301)2 group. each R301group is independently selected from a -CO-R302, -CH2-R302, -CHMe-R302, -CMe2-R302, or a C1-C6 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups, and wherein the saturated hydrocarbyl group may optionally include one or two heteroatoms each independently selected from N and O in its carbon skeleton, or any two R301groups attached to the same nitrogen atom may together with the nitrogen atom to which they are attached form a 3- to 7-membered saturated monocyclic heterocyclic group, wherein saturated the monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four methyl groups, wherein any methyl group may optionally be fluoro substituted;

[0400] R302is selected from a phenyl or a 5- or 6-membered heteroaryl group, wherein the phenyl or the 5- or 6-membered heteroaryl group may optionally be substituted with one or more fluoro, chloro and / or bromo groups;

[0401] R4is selected from hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R400group; and

[0402] R400is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group.

[0403] Typically in such an embodiment:

[0404] R30is selected from :

[0405] (i) a 5- or 6-membered heteroaryl group, wherein the 5- or 6-membered heteroaryl group contains at least one ring nitrogen atom, and wherein the 5- or 6-membered heteroaryl group may optionally be substituted with one or more fluoro, chloro and / or bromo groups, and / or with a single group independently selected from a -OH, -NH2, -R301, -OR301, -NHR301or -N(R301)2group; or

[0406] (ii) a phenyl or a 5- or 6-membered heteroaryl group, wherein the phenyl or the 5- or 6-membered heteroaryl group is substituted with a single -NH2, -NHR301or -N(R301)2group, and wherein the phenyl or the 5- or 6- membered heteroaryl group may optionally be further substituted with one or more fluoro, chloro and / or bromo groups; each R301group is independently selected from a -CO-R302, -CH2-R302or a C1-C4 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the saturated hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton, or any two R301groups attached to the same nitrogen atom may together with the nitrogen atom to which they are attached form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein saturated the monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group; and

[0407] R4is selected from hydrogen or a methyl or fluoromethyl group.

[0408] In a particular embodiment: L30is a bond, i.e. R3is R30;

[0409] R30is selected from :

[0410] (i) a 6-membered heteroaryl group, wherein the 6-membered heteroaryl group contains at least one ring nitrogen atom, and wherein the 6- membered heteroaryl group may optionally be substituted with one or more fluoro, chloro and / or bromo groups, and / or with a single group independently selected from a -NH2, -R301, -NHR301or -N(R301)2 group; or

[0411] (ii) a phenyl group, wherein the phenyl group is substituted with a single -NH2, -NHR301or -N(R301)2group, and wherein the phenyl group may optionally be further substituted with one or more fluoro, chloro and / or bromo groups; each R301group is independently selected from a methyl or fluoromethyl group; and

[0412] R4is selected from hydrogen or a methyl or fluoromethyl group.

[0413] For instance, -NR3R4may have the formula :

[0414] In another particular embodiment:

[0415] R3has the formula -CO-L31-R30;

[0416] L31is a -CH2-, -CHMe- or -CMe2- group, wherein any -CH2-, -CHMe- or -CMe2- group may optionally be fluoro substituted;

[0417] R30is a 5- or 6-membered heteroaryl group, wherein the 5- or 6-membered heteroaryl group contains at least one ring nitrogen atom, and wherein the 5- or 6- membered heteroaryl group may optionally be substituted with one or more fluoro, chloro and / or bromo groups, and / or with a single -R301group;

[0418] R301is selected from a -CH2-R302or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups;

[0419] R302is a phenyl group, wherein the phenyl group may optionally be substituted with one or more fluoro, chloro and / or bromo groups; and

[0420] R4is hydrogen.

[0421] For instance, -NR3R4may have the formula :

[0422] In another embodiment of the first aspect of the invention, R3and R4together with the nitrogen atom to which they are attached form a 3- to 12-membered cyclic group, wherein the cyclic group may optionally be substituted with one or more substituents each independently selected from a halo, oxo (=0), -OH, -SH, -NH2, -SO2H, -SO3H, -SO2NH2, -NO2, or a C1-C6 saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more halo and / or -NO2 groups, wherein the hydrocarbyl group may optionally include one or more heteroatoms each independently selected from N, O and S in its carbon skeleton, and wherein any -S- moiety in the hydrocarbyl group may optionally be substituted with one or two groups each independently selected from oxo ( = 0) and = NH to form a -SO-, -SO2-, -S(=NH)- or -SO( = NH)- moiety.

[0423] Typically in such an embodiment, R3and R4together with the nitrogen atom to which they are attached form a 4- to 7-membered monocyclic group or a 6- to 10- membered bicyclic group, wherein the monocyclic or the bicyclic group may optionally be substituted with one or more substituents each independently selected from a halo, oxo (=0), -OH, -NH2 or a C1-C6 saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more halo groups, and wherein the hydrocarbyl group may optionally include one or two heteroatoms each independently selected from N and O in its carbon skeleton .

[0424] Where R3and R4together with the nitrogen atom to which they are attached form a 4- to 7-membered monocyclic group, typically the monocyclic group is a saturated monocyclic group.

[0425] Where R3and R4together with the nitrogen atom to which they are attached form a 6- to 10-membered bicyclic group, typically the bicyclic group is a fused bicyclic group such as a 8- to 10-membered fused bicyclic group. In one embodiment, the fused bicyclic group is saturated. In a further embodiment of the first aspect of the invention, R3and R4together with the nitrogen atom to which they are attached form a -NO2 group. As will be understood, in such an embodiment, the compound is a compound of Formula (X) :

[0426] Formula (X) wherein R1, R2, Xx-X4, Ax-A6and Q1are as defined in accordance with Formula (I).

[0427] As stated in accordance with the first aspect of the invention :

[0428] X1is N, C-H, C-Hal or C-RX1;

[0429] X2is N, C-H, C-Hal or C-RX2;

[0430] X3is N, C-H, C-Hal or C-RX3; and

[0431] X4is N or C; provided that no more than three of X1, X2, X3and X4are N; and

[0432] RX1, RX2and RX3are each independently selected from -OH, -SH, -NH2, -SO2H, -SO3H, -SO2NH2, -NO2, or a C1-C4 saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more halo and / or -NO2 groups, wherein the hydrocarbyl group may optionally include one or more heteroatoms each independently selected from N, O and S in its carbon skeleton, and wherein any -S- moiety in the hydrocarbyl group may optionally be substituted with one or two groups each independently selected from oxo (=0) and = NH to form a -SO-, -SO2-, -S(=NH)- or -SO( = NH)- moiety.

[0433] Typically, when X4is N, A6is C.

[0434] Typically, when X4is C, A6is N.

[0435] Typically, no more than two of X1, X2, X3and X4are N.

[0436] Typically, at least one of X1, X2, X3and X4is N. Typically, at least X1is N. In a particular embodiment, X2is N. Without wishing to be bound be theory, it is thought that the compounds of the invention where X2is N offer particular electronic properties that are advantageous to the pharmacological profile of the molecule.

[0437] In one embodiment:

[0438] X1is N, C-H, C-Hal or C-RX1;

[0439] X2is N, C-H, C-Hal or C-RX2;

[0440] X3is N, C-H, C-Hal or C-RX3; and

[0441] X4is C; provided that no more than two of X1, X2and X3are N. Typically in such an embodiment, at least one of X1, X2and X3is N.

[0442] Typically in such an embodiment, at least X1is N. In a particular embodiment, X2is N.

[0443] In another embodiment:

[0444] X1is N, C-H, C-Hal or C-RX1;

[0445] X2is N, C-H, C-Hal or C-RX2;

[0446] X3is C-H, C-Hal or C-RX3; and

[0447] X4is N or C; provided that at least one of X1, X2and X4is N, and that no more than two of X1, X2and X4are N.

[0448] In a further embodiment:

[0449] X1is N, C-H, C-Hal or C-RX1;

[0450] X2is N, C-H, C-Hal or C-RX2;

[0451] X3is C-H, C-Hal or C-RX3; and

[0452] X4is C; provided that at least one of X1and X2is N. Typically in such an embodiment, at least X1is N. In a particular embodiment, X2is N. More typically, X1is N and X2is N.

[0453] In one embodiment of the first aspect of the invention, RX1, RX2and RX3are each independently selected from -OH, -SH, -NH2, -SO2H, -SO3H, -SO2NH2 or a C1-C4 saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more halo groups, and wherein the hydrocarbyl group may optionally include one or two heteroatoms each independently selected from N and O in its carbon skeleton . More typically, RX1, RX2and RX3are each independently selected from a C1-C4 saturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton . More typically still, RX1, RX2and RX3are each independently selected from a methyl, fluoromethyl, methoxy or fluoromethoxy group. Yet more typically, RX1, RX2and RX3are each independently selected from a methyl or fluoromethyl group.

[0454] In a further embodiment:

[0455] X1is N, C-H or C-Hal;

[0456] X2is N, C-H or C-Hal;

[0457] X3is N, C-H or C-Hal; and

[0458] X4is N or C; provided that no more than three of X1, X2, X3and X4are N. Typically in such an embodiment, no more than two of X1, X2, X3and X4are N. Typically, at least one of X1, X2, X3and X4is N. Typically in such an embodiment, at least X1is N. In a particular embodiment, X2is N.

[0459] In one embodiment:

[0460] X1is N, C-H or C-Hal;

[0461] X2is N, C-H or C-Hal;

[0462] X3is N, C-H or C-Hal; and

[0463] X4is C; provided that no more than two of X1, X2and X3are N. Typically in such an embodiment, at least one of X1, X2and X3is N.

[0464] Typically in such an embodiment, at least X1is N. In a particular embodiment, X2is N.

[0465] In another embodiment:

[0466] X1is N, C-H or C-Hal;

[0467] X2is N, C-H or C-Hal;

[0468] X3is C-H or C-Hal; and

[0469] X4is N or C; provided that at least one of X1, X2and X4is N, and that no more than two of X1, X2and X4are N.

[0470] In a further embodiment: X1is N, C-H or C-Hal;

[0471] X2is N, C-H or C-Hal;

[0472] X3is C-H or C-Hal; and

[0473] X4is C; provided that at least one of X1and X2is N. Typically in such an embodiment, at least X1is N. In a particular embodiment, X2is N. More typically, X1is N and X2is N. More typically still, X1is N, X2is N and X3is C-H.

[0474] As stated in accordance with the first aspect of the invention :

[0475] Q1is O, S, N, N-H, N-RQ1, C-H, C-Hal, or C-R«2;

[0476] RQ1is selected from a C1-C4 saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more halo and / or -NO2 groups, wherein the hydrocarbyl group may optionally include one or more heteroatoms each independently selected from N, O and S in its carbon skeleton, and wherein any -S- moiety in the hydrocarbyl group may optionally be substituted with one or two groups each independently selected from oxo (=0) and = NH to form a -SO-, -SO2-, -S(=NH)- or -SO( = NH)- moiety, provided that the atom of RQ1that is directly attached to the nitrogen atom of N-RQ1is a carbon atom; and

[0477] RQ2isselected from -OH, -SH, -NH2, -SO2H, -SO3H, -SO2NH2, -NO2, or a C1-C4 saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more halo and / or -NO2 groups, wherein the hydrocarbyl group may optionally include one or more heteroatoms each independently selected from N, O and S in its carbon skeleton, and wherein any -S- moiety in the hydrocarbyl group may optionally be substituted with one or two groups each independently selected from oxo (=0) and =NH to form a -SO-, -SO2-, -S(=NH)- or -SO( = NH)- moiety.

[0478] In one embodiment of the first aspect of the invention, RQ1and RQ2are each independently selected from a C1-C4 alkyl, C3-C4 cycloalkyl, C1-C4 fluoroalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-RQ3group, wherein RQ3is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group. More typically, RQ1and RQ2are each independently selected from a C1-C4 alkyl, C3-C4 cycloalkyl, C1-C4 fluoroalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl or fluorocyclopropylmethyl group. More typically still, RQ1and RQ2are each independently selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group. Yet more typically, RQ1and RQ2are each independently selected from a methyl or fluoromethyl group.

[0479] Typically, Q1is O, S, N-H, N-RQ1, C-H, C-Hal, or C-RQ2. More typically, Q1is O, S, N-H or N-RQ1. For example, Q1may be O, S, N-H or N-RQ1, wherein RQ1is selected from a C1-C4 alkyl, C3-C4 cycloalkyl, C1-C4 fluoroalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-RQ3group, wherein RQ3is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group. More typically still, Q1is S, N-H or N-RQ1. Typically in such an embodiment, RQ1is a methyl or fluoromethyl group. Yet more typically, Q1is S or N-H.

[0480] In one embodiment, Q1is S.

[0481] In another embodiment, Q1is N-H or N-RQ1, wherein RQ1is a methyl or fluoromethyl group. Typically in such an embodiment, Q1is N-H.

[0482] As stated in accordance with the first aspect of the invention :

[0483] A1is N, C-H, C-Hal or C-RA1;

[0484] A2is N, C-H, C-Hal or C-RA2;

[0485] A3is N, C-H, C-Hal or C-RA3;

[0486] A4is N, C-H, C-Hal or C-RA4; and

[0487] A5is N or C; provided that no more than three of A1, A2, A3, A4and A5are N; and

[0488] RA1, RA2, RA3and RA4are each independently selected from -OH, -SH, -NH2, -SO2H, -SO3H, -SO2NH2, -NO2, or a C1-C4 saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more halo and / or -NO2 groups, wherein the hydrocarbyl group may optionally include one or more heteroatoms each independently selected from N, O and S in its carbon skeleton, and wherein any -S- moiety in the hydrocarbyl group may optionally be substituted with one or two groups each independently selected from oxo (=0) and = NH to form a -SO-, -SO2-, -S(=NH)- or -SO( = NH)- moiety.

[0489] Typically, no more than two of A1, A2, A3, A4and A5are N. More typically, no more than one of A1, A2, A3, A4and A5is N.

[0490] Typically, when A5is N, X4is N, A6is C and Q1is N, C-H, C-Hal, or C-RQ2. More typically, when A5is N, X4is N, A6is C and Q1is C-H, C-Hal, or C-RQ2. Typically, where Q1is O, S, N-H or N-RQ1, A5is C.

[0491] In one embodiment,

[0492] A1is N, C-H, C-Hal or C-RA1;

[0493] A2is N, C-H, C-Hal or C-RA2;

[0494] A3is N, C-H, C-Hal or C-RA3;

[0495] A4is N, C-H, C-Hal or C-RA4; and

[0496] A5is C; provided that no more than two of A1, A2, A3and A4are N.

[0497] Typically in such an embodiment, no more than one of A1, A2, A3and A4is N. Typically, where one of A1, A2, A3and A4is N, A2is N or A3is N. More typically, A3is N.

[0498] In a further embodiment,

[0499] A1is C-H C-Hal or C-RA1;

[0500] A2is C-H, C-Hal or C-RA2;

[0501] A3is C-H, C-Hal or C-RA3;

[0502] A4is C-H, C-Hal or C-RA4; and A5is C.

[0503] Typically in the above embodiments, no more than two of A1, A2, A3and A4are C-RA1, C-RA2, C-RA3or C-RA4. More typically, no more than one of A1, A2, A3and A4is C-RA1, C-RA2, C-RA3or C-RA4.

[0504] In one embodiment, RA1, RA2, RA3and RA4are each independently selected from -OH, -SH, -NH2, -SO2H, -SO3H, -SO2NH2 or a C1-C4 saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more halo groups, and wherein the hydrocarbyl group may optionally include one or two heteroatoms each independently selected from N and O in its carbon skeleton. More typically, RA1, RA2, RA3and RA4are each independently selected from a C1-C4 saturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton . More typically still, RA1, RA2, RA3and RA4are each independently selected from a methyl, fluoromethyl, methoxy or fluoromethoxy group. Yet more typically, RA1, RA2, RA3and RA4are each independently selected from a methyl or fluoromethyl group.

[0505] In another embodiment,

[0506] A1is N, C-H or C-Hal;

[0507] A2is N, C-H or C-Hal;

[0508] A3is N, C-H or C-Hal;

[0509] A4is N, C-H or C-Hal; and

[0510] A5is C; provided that no more than two of A1, A2, A3and A4are N.

[0511] Typically in such an embodiment, no more than one of A1, A2, A3and A4is N.

[0512] Typically, where one of A1, A2, A3and A4is N, A2is N or A3is N. More typically, A3is N.

[0513] In a further embodiment,

[0514] A1is C-H or C-Hal;

[0515] A2is C-H or C-Hal;

[0516] A3is C-H or C-Hal;

[0517] A4is C-H or C-Hal; and

[0518] A5is C.

[0519] Most typically, A1is C-H, A2is C-H, A3is C-H, A4is C-H and A5is C.

[0520] As stated in accordance with the first aspect of the invention, A6is N or C. Typically, A6is N.

[0521] As stated in accordance with the first aspect of the invention, each Hal is independently selected from a fluoro, chloro, bromo or iodo group. Typically, each Hal is independently selected from a fluoro, chloro or bromo group.

[0522] In one embodiment of the first aspect of the invention, the compound is a compound of Formula (XI) :

[0523]

[0524] Formula (XI) wherein R1, R2, R3, R4, X1, X2and Q1are as defined in accordance with Formula (I).

[0525] In another embodiment of the first aspect of the invention, the compound is a compound of Formula (XII) :

[0526] Formula (XII) wherein R1, R2, X1, X2and Q1are as defined in accordance with Formula (I) .

[0527] In a further embodiment of the first aspect of the invention, the compound is a compound of Formula (XIII) :

[0528] Formula (XIII) wherein R1, R2, X1, X2, Q1, L3, Q3, R31and R4are as defined in accordance with Formula (I). In a one embodiment of the first aspect of the invention, the compound is a compound of Formula (XIV) :

[0529] Formula (XIV) wherein R1, R2, X1, X2, Q1, R4, L3, R31and R32are as defined in accordance with Formula (I).

[0530] In another embodiment of the first aspect of the invention, the compound is a compound of Formula (XV) :

[0531] Formula (XV) wherein R1, R2, X1, X2, Q1, L3, R31and R4are as defined in accordance with Formula (I). In yet another embodiment of the first aspect of the invention, the compound is a compound of Formula (XVI) : wherein R1, R2, X1, X2, Q1, R4, L31, R31and R32are as defined in accordance with

[0532] Formula (I). In one aspect of such an embodiment, R4is selected from hydrogen or a C1-C4 alkyl or C1-C4 fluoroalkyl group.

[0533] In one embodiment of the first aspect of the invention, the compound is a compound of Formula (XVII) : wherein R1, R2, X1, X2, Q1, R4, R41, L32, R31and R32are as defined in accordance with

[0534] Formula (I).

[0535] In another embodiment of the first aspect of the invention, the compound is a compound of Formula (XVIII) :

[0536] Formula (XVIII) wherein R1, R2, X1, X2, Q1, R4, L36and R35are as defined in accordance with Formula (I). In one aspect of such an embodiment, R4is selected from hydrogen or a C1-C4 alkyl or C1-C4 fluoroalkyl group.

[0537] In yet another embodiment of the first aspect of the invention, the compound is a compound of Formula (XIX) :

[0538] Formula (XIX) wherein R1, R2, X1, X2, Q1, R4, L30and R30are as defined in accordance with Formula (I). In one aspect of such an embodiment, R4is selected from hydrogen or a C1-C4 alkyl or C1-C4 fluoroalkyl group.

[0539] In a further embodiment of the first aspect of the invention, the compound is a compound of Formula (XX) :

[0540] Formula (XX) wherein R1, R2, X1, X2and Q1are as defined in accordance with Formula (I).

[0541] As will be understood, insofar as practical, embodiments directed to one substituent or moiety (such as a given R or X group) may be read in conjunction with embodiments directed to a different substituent or moiety.

[0542] For example, in a first exemplary embodiment, there is provided a compound of Formula (I) as defined above, wherein : R1and R2are each independently selected from hydrogen or a Ci-Cs saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight- chained or branched, or be or include a single cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more halo and / or -NO? groups, and wherein the hydrocarbyl group may optionally include one, two, three or four heteroatoms each independently selected from N and O in its carbon skeleton; or

[0543] R1and R2together with the nitrogen atom to which they are attached form a 4- to 7-membered monocyclic group or a 6- to 12-membered bicyclic group, wherein the monocyclic or the bicyclic group may optionally be substituted with one or more substituents each independently selected from a halo, oxo ( = 0), -OH, -NH2 or a C1-C6 saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more halo groups, and wherein the hydrocarbyl group may optionally include one or two heteroatoms each independently selected from N and O in its carbon skeleton;

[0544] R3is selected from hydrogen or a C1-C12 saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include one or two cyclic groups, wherein the hydrocarbyl group may optionally be substituted with one or more halo and / or -NO2 groups, and wherein the hydrocarbyl group may optionally include one, two, three or four heteroatoms each independently selected from N and O in its carbon skeleton; and

[0545] R4is selected from hydrogen or a C1-C4 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the saturated hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton; or

[0546] R3and R4together with the nitrogen atom to which they are attached form a 4- to 7-membered monocyclic group or a 6- to 10-membered bicyclic group, wherein the monocyclic or the bicyclic group may optionally be substituted with one or more substituents each independently selected from a halo, oxo ( = 0), -OH, -NH2 or a C1-C6 saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more halo groups, and wherein the hydrocarbyl group may optionally include one or two heteroatoms each independently selected from N and O in its carbon skeleton; or

[0547] R3and R4together with the nitrogen atom to which they are attached form a -NO2 group; X1is N, C-H, C-Hal or C-RX1;

[0548] X2is N, C-H, C-Hal or C-RX2;

[0549] X3is N, C-H, C-Hal or C-RX3; and

[0550] X4is C; provided that at least one of X1, X2and X3is N, and that no more than two of X1, X2, and X3are N;

[0551] RX1, RX2and RX3are each independently selected from a C1-C4 saturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton;

[0552] Q1is O, S, N-H or N-RQ1;

[0553] RQ1is selected from a C1-C4 alkyl, C3-C4 cycloalkyl, C1-C4 fluoroalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-RQ3group;

[0554] RQ3is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group;

[0555] A1is N, C-H, C-Hal or C-RA1;

[0556] A2is N, C-H, C-Hal or C-RA2;

[0557] A3is N, C-H, C-Hal or C-RA3;

[0558] A4is N, C-H, C-Hal or C-RA4;

[0559] A5is C; and

[0560] RA1, RA2, RA3and RA4are each independently selected from a C1-C4 saturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton; provided that no more than one of A1, A2, A3and A4is N; and provided that no more than two of A1, A2, A3and A4are C-RA1, C-RA2, C-RA3or C-RA4;

[0561] A6is N; and each Hal is independently selected from a fluoro, chloro or bromo group.

[0562] Typically in accordance with the first exemplary embodiment, Q1is S or N-H.

[0563] Typically in accordance with the first exemplary embodiment, X2is N. In a second exemplary embodiment, there is provided a compound of Formula (I) as defined above, wherein :

[0564] R1is a C1-C8saturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, wherein the hydrocarbyl group optionally includes one or two heteroatoms each independently selected from N and O in its carbon skeleton; and

[0565] R2is selected from hydrogen or a C1-C3 alkyl or C1-C3 fluoroalkyl group; or

[0566] R1and R2together with the nitrogen atom to which they are attached form a 4- to 7-membered saturated monocyclic group or a 6- to 12-membered saturated bicyclic group, wherein the monocyclic or the bicyclic group may optionally be substituted with one or more substituents each independently selected from a a fluoro, oxo ( = 0), -OH, -NH2, or a C1-C4 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the saturated hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton;

[0567] R3is selected from hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C2-C4 alkenyl, C2-C4 fluoroalkenyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R300group;

[0568] R300is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, C2-C3 alkenyl, C2-C3 fluoroalkenyl, cyclopropyl or fluorocyclopropyl group;

[0569] R4is selected from hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C2-C4 alkenyl, C2-C4 fluoroalkenyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R400group; and

[0570] R400is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, C2-C3 alkenyl, C2-C3 fluoroalkenyl, cyclopropyl or fluorocyclopropyl group; or

[0571] R3and R4together with the nitrogen atom to which they are attached form an azetidinyl, pyrrolidinyl, piperidinyl or azepanyl group;

[0572] X1is N, C-H, C-Hal or C-RX1;

[0573] X2is N, C-H, C-Hal or C-RX2;

[0574] X3is C-H, C-Hal or C-RX3; and

[0575] X4is C; provided that at least one of X1and X2is N;

[0576] RX1and RX2are each independently selected from a methyl, fluoromethyl, methoxy or fluoromethoxy group; Q1is S, N-H or N-RQ1;

[0577] RQ1is selected from methyl or fluoromethyl group;

[0578] A1is N, C-H, C-Hal or C-RA1;

[0579] A2is N, C-H, C-Hal or C-RA2;

[0580] A3is N, C-H, C-Hal or C-RA3;

[0581] A4is N, C-H, C-Hal or C-RA4;

[0582] A5is C; and

[0583] RA1, RA2, RA3and RA4are each independently selected from a methyl, fluoromethyl, methoxy or fluoromethoxy group; provided that no more than one of A1, A2, A3and A4is N; and provided that no more than two of A1, A2, A3and A4are C-RA1, C-RA2, C-RA3or C-RA4;

[0584] A6is N; and each Hal is independently selected from a fluoro, chloro or bromo group.

[0585] Typically in accordance with the second exemplary embodiment, R3and R4are both hydrogen, i.e. the compound is a compound of Formula (II) as defined above.

[0586] In a third exemplary embodiment, there is provided a compound of Formula (III) as defined above, wherein :

[0587] R1is a C1-C8saturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, wherein the hydrocarbyl group optionally includes one or two heteroatoms each independently selected from N and O in its carbon skeleton; and

[0588] R2is selected from hydrogen or a C1-C3 alkyl or C1-C3 fluoroalkyl group; or

[0589] R1and R2together with the nitrogen atom to which they are attached form a 4- to 7-membered saturated monocyclic group or a 6- to 12-membered saturated bicyclic group, wherein the monocyclic or the bicyclic group may optionally be substituted with one or more substituents each independently selected from a a fluoro, oxo ( = 0), -OH, -NH2, or a C1-C4 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the saturated hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton; the group -L3-Q3-R31contains no more than 12 carbon atoms; Q3is O, S or NR32;

[0590] L3is a straight-chained alkylene group, wherein the straight-chained alkylene group optionally includes a single heteroatom independently selected from O and N in its carbon skeleton, wherein L3has a chain length of from 2 to 6 atoms, and wherein L3may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL3;

[0591] R31is hydrogen or a C1-C6 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups, and wherein the saturated hydrocarbyl group may optionally include one or two heteroatoms each independently selected from N and O in its carbon skeleton;

[0592] R32is hydrogen or a C1-C6 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups, and wherein the saturated hydrocarbyl group may optionally include one or two heteroatoms each independently selected from N, O and S in its carbon skeleton, wherein any -S- moiety in the saturated hydrocarbyl group may optionally be substituted with one or two groups each independently selected from oxo (=0) and =NH to form a -SO-, -SO2-, -S( = NH)- or -SO( = NH)- moiety; each RL3is independently selected from a methyl or fluoromethyl group; or any two RL3may, together with the atom or atoms to which they are attached, form a 3- to 7-membered saturated monocyclic group, wherein the 3- to 7- membered saturated monocyclic group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL4; or any RL3and R31may, together with the atoms to which they are attached, form a 3- to 7-membered saturated monocyclic heterocyclic group, wherein the 3- to 7-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL4; or R31and R32may, together with the nitrogen atom to which they are attached, form a 3- to 7-membered saturated monocyclic heterocyclic group, wherein the 3- to 7-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL4; or any two RL3and R31may, together with the atoms to which they are attached, form a 7- to 10-membered saturated bicyclic heterocyclic group, wherein the 7- to 10-membered saturated bicyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL4; or any RL3, R31and R32may, together with the atoms to which they are attached, form a 7- to 10-membered saturated bicyclic heterocyclic group, wherein the 7- to 10-membered saturated bicyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL4; each RL4is independently selected from a methyl or a fluoromethyl group;

[0593] R4is selected from hydrogen or a C1-C4 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the saturated hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton;

[0594] X1is N, C-H, C-Hal or C-RX1;

[0595] X2is N, C-H, C-Hal or C-RX2;

[0596] X3is C-H, C-Hal or C-RX3; and

[0597] X4is C; provided that at least one of X1and X2is N;

[0598] RX1and RX2are each independently selected from a methyl, fluoromethyl, methoxy or fluoromethoxy group;

[0599] Q1is S, N-H or N-RQ1;

[0600] RQ1is selected from methyl or fluoromethyl group;

[0601] A1is N, C-H, C-Hal or C-RA1;

[0602] A2is N, C-H, C-Hal or C-RA2;

[0603] A3is N, C-H, C-Hal or C-RA3;

[0604] A4is N, C-H, C-Hal or C-RA4;

[0605] A5is C; and

[0606] RA1, RA2, RA3and RA4are each independently selected from a methyl, fluoromethyl, methoxy or fluoromethoxy group; provided that no more than one of A1, A2, A3and A4is N; and provided that no more than two of A1, A2, A3and A4are C-RA1, C-RA2, C-RA3or

[0607] C-RA4;

[0608] A6is N; and each Hal is independently selected from a fluoro, chloro or bromo group. In a first aspect of the third exemplary embodiment, R3has the formula -L3-NR31R32, i.e. the compound is a compound of Formula (IV), wherein : the group -L3-NR31R32contains no more than 10 carbon atoms;

[0609] L3is a straight-chained alkylene group, wherein the straight-chained alkylene group optionally includes a single nitrogen atom in its carbon skeleton, wherein the atom of L3that is directly attached to the nitrogen atom of -NR4- is a carbon atom, wherein the atom of L3that is directly attached to the nitrogen atom of -NR31R32is a carbon atom, wherein L3has a chain length of from 2 to 5 atoms, and wherein L3may optionally be substituted with one or more fluoro groups and / or one or two groups RL3;

[0610] R31is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups;

[0611] R32is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups; and each RL3is independently selected from a methyl or fluoromethyl group; or any two RL3may, together with the atom or atoms to which they are attached, form a 3- to 6-membered saturated monocyclic group, wherein the 3- to 6- membered saturated monocyclic group may optionally be substituted with one or more fluoro groups and / or one or two groups RL4; or any RL3and R31may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one or two groups RL4; or R31and R32may, together with the nitrogen atom to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one or two groups RL4; each RL4is independently selected from a methyl or a fluoromethyl group;

[0612] R4is selected from hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R400group; and

[0613] R400is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group. In a second aspect of the third exemplary embodiment, R3has the formula -CO-L31-NR31R32, i.e. the compound is a compound of Formula (VI), wherein: the group -CO-L31-NR31R32contains no more than 10 carbon atoms;

[0614] L31is a straight-chained alkylene group, wherein the straight-chained alkylene group optionally includes a single nitrogen atom in its carbon skeleton, wherein the atom of L31that is directly attached to the carbon atom of the carbonyl group of -CO-L31-NR31R32is a carbon atom, wherein the atom of L31that is directly attached to the nitrogen atom of -NR31R32is a carbon atom, wherein L31has a chain length of from 2 to 5 atoms, and wherein L31may optionally be substituted with one or more fluoro groups and / or one or two groups RL3;

[0615] R31is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group;

[0616] R32is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group; and each RL3is independently selected from a methyl or fluoromethyl group; or any two RL3may, together with the atom or atoms to which they are attached, form a 3- to 6-membered saturated monocyclic group, wherein the 3- to 6- membered saturated monocyclic group may optionally be substituted with one or more fluoro groups and / or a single oxo ( = 0) group and / or one or two groups RL4; or any RL3and R31may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group and / or one or two groups RL4; or R31and R32may, together with the nitrogen atom to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group and / or one or two groups RL4; each RL4is independently selected from a methyl or a fluoromethyl group;

[0617] R4is selected from hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R400group; and R400is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group.

[0618] In a third aspect of the third exemplary embodiment, R3has the formula -CO-NR41-L32-NR31R32, i.e. the compound is a compound of Formula (VII), wherein : the group -CO-NR41-L32-NR31R32contains no more than 10 carbon atoms;

[0619] L32is a C2-C4 straight-chained alkylene group, wherein the alkylene group may optionally be substituted with one or more fluoro groups and / or one or two groups RL3;

[0620] R31is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group;

[0621] R32is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group;

[0622] R41is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group; and each RL3is independently selected from a methyl or fluoromethyl group; or any RL3and R31may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group and / or one or two groups RL4; or any RL3and R41may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group and / or one or two groups RL4; or any R31and R41may, together with the atoms to which they are attached, form a piperazinyl group, wherein the piperazinyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group and / or one or two groups RL4; or R31and R32may, together with the nitrogen atom to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group and / or one or two groups RL4; each RL4is independently selected from a methyl or a fluoromethyl group;

[0623] R4is selected from hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R400group; and

[0624] R400is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group.

[0625] In a fourth aspect of the third exemplary embodiment, R3has the formula -CO-L36-OR35, i.e. the compound is a compound of Formula (VIII), wherein: the group -CO-L36-OR35contains no more than 10 carbon atoms;

[0626] L36is a straight-chained alkylene group, wherein the straight-chained alkylene group optionally includes a single nitrogen atom in its carbon skeleton, wherein the atom of L36that is directly attached to the carbon atom of the carbonyl group of -CO-L36-OR35is a carbon atom, wherein the atom of L36that is directly attached to the oxygen atom of -OR35is a carbon atom, wherein L36has a chain length of from 2 to 5 atoms, and wherein L36may optionally be substituted with one or more fluoro groups and / or one or two groups RL3;

[0627] R35is a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group; and each RL3is independently selected from a methyl or fluoromethyl group; or any two RL3may, together with the atom or atoms to which they are attached, form a 3- to 6-membered saturated monocyclic group, wherein the 3- to 6- membered saturated monocyclic group may optionally be substituted with one or more fluoro groups and / or a single oxo ( = 0) group and / or one or two groups RL4; or any RL3and R35may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group and / or one or two groups RL4; each RL4is independently selected from a methyl or a fluoromethyl group; and R4is selected from hydrogen or a C1-C4 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the saturated hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton.

[0628] In a fourth exemplary embodiment, there is provided a compound of Formula (IX) as defined above, wherein :

[0629] R1is a Ci-C8saturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, wherein the hydrocarbyl group optionally includes one or two heteroatoms each independently selected from N and O in its carbon skeleton; and

[0630] R2is selected from hydrogen or a C1-C3 alkyl or C1-C3 fluoroalkyl group; or

[0631] R1and R2together with the nitrogen atom to which they are attached form a 4- to 7-membered saturated monocyclic group or a 6- to 12-membered saturated bicyclic group, wherein the monocyclic or the bicyclic group may optionally be substituted with one or more substituents each independently selected from a a fluoro, oxo ( = 0), -OH, -NH2, or a C1-C4 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the saturated hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton; the group -|_30-R30contains no more than 12 carbon atoms;

[0632] L30is a bond or a C1-C4 straight-chained alkylene group, wherein the alkylene group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL30; each RL30is independently selected from a methyl or a fluoromethyl group;

[0633] R30is a phenyl or a 5- or 6-membered heteroaryl group, wherein the phenyl or the 5- or 6-membered heteroaryl group may optionally be substituted with one or more groups each independently selected from a fluoro, chloro, bromo, -OH, -NH2, -R301, -OR301, -NHR301or -N(R301)2group; each R301group is independently selected from a Ci-Cs saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight- chained or branched, or be or include a single cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more halo and / or -NO2 groups, and wherein the hydrocarbyl group may optionally include one, two, three or four heteroatoms each independently selected from N and O in its carbon skeleton, or wherein any two R301groups attached to the same nitrogen atom may together with the nitrogen atom to which they are attached form a 3- to 7-membered monocyclic heterocyclic group, wherein the monocyclic heterocyclic group may optionally be substituted with one or more substituents each independently selected from a halo, oxo (=0), -OH, -NH2, -NO2 or a C1-C4 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the saturated hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton;

[0634] R4is selected from hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R400group;

[0635] R400is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group;

[0636] X1is N, C-H, C-Hal or C-RX1;

[0637] X2is N, C-H, C-Hal or C-RX2;

[0638] X3is C-H, C-Hal or C-RX3; and

[0639] X4is C; provided that at least one of X1and X2is N;

[0640] RX1and RX2are each independently selected from a methyl, fluoromethyl, methoxy or fluoromethoxy group;

[0641] Q1is S, N-H or N-RQ1;

[0642] RQ1is selected from methyl or fluoromethyl group;

[0643] A1is N, C-H, C-Hal or C-RA1; A2is N, C-H, C-Hal or C-RA2; A3is N, C-H, C-Hal or C-RA3; A4is N, C-H, C-Hal or C-RA4; A5is C; and

[0644] RA1, RA2, RA3and RA4are each independently selected from a methyl, fluoromethyl, methoxy or fluoromethoxy group; provided that no more than one of A1, A2, A3and A4is N; and provided that no more than two of A1, A2, A3and A4are C-RA1, C-RA2, C-RA3or

[0645] C-RA4;

[0646] A6is N; and each Hal is independently selected from a fluoro, chloro or bromo group. In a fifth exemplary embodiment, there is provided a compound of Formula (X) as defined above, wherein :

[0647] R1is a C1-C8saturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, wherein the hydrocarbyl group optionally includes one or two heteroatoms each independently selected from N and O in its carbon skeleton; and

[0648] R2is selected from hydrogen or a C1-C3 alkyl or C1-C3 fluoroalkyl group; or

[0649] R1and R2together with the nitrogen atom to which they are attached form a 4- to 7-membered saturated monocyclic group or a 6- to 12-membered saturated bicyclic group, wherein the monocyclic or the bicyclic group may optionally be substituted with one or more substituents each independently selected from a a fluoro, oxo ( = 0), -OH, -NH2, or a C1-C4 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the saturated hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton;

[0650] X1is N, C-H, C-Hal or C-RX1;

[0651] X2is N, C-H, C-Hal or C-RX2;

[0652] X3is C-H, C-Hal or C-RX3; and

[0653] X4is C; provided that at least one of X1and X2is N;

[0654] RX1and RX2are each independently selected from a methyl, fluoromethyl, methoxy or fluoromethoxy group;

[0655] Q1is S, N-H or N-RQ1;

[0656] RQ1is selected from methyl or fluoromethyl group;

[0657] A1is N, C-H, C-Hal or C-RA1;

[0658] A2is N, C-H, C-Hal or C-RA2;

[0659] A3is N, C-H, C-Hal or C-RA3;

[0660] A4is N, C-H, C-Hal or C-RA4;

[0661] A5is C; and

[0662] RA1, RA2, RA3and RA4are each independently selected from a methyl, fluoromethyl, methoxy or fluoromethoxy group; provided that no more than one of A1, A2, A3and A4is N; and provided that no more than two of A1, A2, A3and A4are C-RA1, C-RA2, C-RA3or

[0663] C-RA4; A6is N; and each Hal is independently selected from a fluoro, chloro or bromo group.

[0664] Typically in accordance with any of the second to the fifth exemplary embodiments, Q1is S or N-H.

[0665] Typically in accordance with any of the second to the fifth exemplary embodiments, X2is N.

[0666] In a particular aspect of any of the second to the fifth exemplary embodiments (typical for example when Q1is S or N-H and / or X2is N and / or in accordance with any of the first to fourth aspects of the third exemplary embodiment), -NR / R2has the formula: wherein : n is 1 or 2; m is 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10; each R11is independently selected from a fluoro, methyl or fluoromethyl group, provided that no more than four R11are selected from a methyl or fluoromethyl group;

[0667] X12is O or NR12; and

[0668] R12is hydrogen or a C1-C4 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the saturated hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton.

[0669] In another particular aspect of any of the second to the fifth exemplary embodiments (typical for example when Q1is S or N-H and / or X2is N and / or in accordance with any of the first to fourth aspects of the third exemplary embodiment), -NRXR2has the formula: wherein : j is 0, 1, 2 or 3; k is 0, 1, 2 or 3; p is 0, 1, 2 or 3; and q is 0, 1, 2 or 3; provided that: j + k = 2 or 3; p + q = 2 or 3; when j = 0, q is 1, 2 or 3; when k = 0, p is 1, 2 or 3; when p = 0, k is 1, 2 or 3; and when q = 0, j is 1, 2 or 3; and wherein : r is 0, 1 or 2; s is 0, 1 or 2;

[0670] R15is hydrogen or a C1-C4 alkyl, C3-C4 cycloalkyl, C1-C4 fluoroalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R150group;

[0671] R150is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group; and each R16is independently selected from a methyl or fluoromethyl group.

[0672] In a further particular aspect of any of the second to the fifth exemplary embodiments (typical for example when Q1is S or N-H and / or X2is N and / or in accordance with any of the first to fourth aspects of the third exemplary embodiment), -NRXR2has the formula : wherein :

[0673] X15is O or NR15; j is 0, 1, 2, 3 or 4; k is 0, 1, 2, 3 or 4; p is 0, 1, 2, 3 or 4; and q is 0, 1, 2, 3 or 4; provided that: j + k = 3 or 4; p + q = 3 or 4; when j = 0, q is 1, 2, 3 or 4 and p is 1, 2, 3 or 4; when k = 0, q is 1, 2, 3 or 4 and p is 1, 2, 3 or 4; when p = 0, k is 1, 2, 3 or 4 and j is 1, 2, 3 or 4; and when q = 0, k is 1, 2, 3 or 4 and j is 1, 2, 3 or 4; and wherein : r is 0, 1 or 2; s is 0, 1 or 2;

[0674] R15is hydrogen or a C1-C4 alkyl, C3-C4 cycloalkyl, C1-C4 fluoroalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R150group;

[0675] R150is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group; and each R16is independently selected from a methyl or fluoromethyl group.

[0676] In a sixth exemplary embodiment, there is provided a compound of Formula (XI) as defined above, wherein :

[0677] R1is a -(CH2)2-NR102R103group;

[0678] R102is selected from a methyl, ethyl, isopropyl or cyclopropyl group, any of which may optionally be fluoro substituted;

[0679] R103is selected from hydrogen or a methyl or fluoromethyl group;

[0680] R2is selected from hydrogen or a methyl or fluoromethyl group;

[0681] R3is selected from hydrogen or a C1-C3 alkyl, C1-C3 fluoroalkyl, C2-C3 alkenyl, C2-C3 fluoroalkenyl, cyclopropyl, fluorocyclopropyl, or -CO-R300group;

[0682] R300is selected from a methyl, ethyl, fluoromethyl, fluoroethyl, ethenyl or fluoroethenyl group;

[0683] R4is selected from hydrogen or a methyl or fluoromethyl group;

[0684] X1is N;

[0685] X2is N or C-H; and

[0686] Q1is S or N-H.

[0687] Typically in accordance with the sixth exemplary embodiment, R3is hydrogen and R4is hydrogen. Typically in accordance with the sixth exemplary embodiment, X2is N.

[0688] Typically in accordance with the sixth exemplary embodiment, Q1is S.

[0689] Most typically in accordance with the sixth exemplary embodiment, R3is hydrogen, R4is hydrogen, X2is N and Q1is S.

[0690] In a seventh exemplary embodiment, there is provided a compound of Formula (Xia):

[0691] Formula (Xia) wherein :

[0692] R12is selected from hydrogen or a C1-C4 alkyl, C3-C4 cycloalkyl, C1-C4 fluoroalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R120group;

[0693] R120is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group; n is 1 or 2;

[0694] R3is selected from hydrogen or a C1-C3 alkyl, C1-C3 fluoroalkyl, C2-C3 alkenyl, C2-C3 fluoroalkenyl, cyclopropyl, fluorocyclopropyl, or -CO-R300group;

[0695] R300is selected from a methyl, ethyl, fluoromethyl, fluoroethyl, ethenyl or fluoroethenyl group;

[0696] R4is selected from hydrogen or a methyl or fluoromethyl group;

[0697] X1is N;

[0698] X2is N or C-H; and

[0699] Q1is S or N-H.

[0700] Typically in accordance with the seventh exemplary embodiment, R12is selected from hydrogen or a methyl or fluoromethyl group. Typically in accordance with the seventh exemplary embodiment, R3is hydrogen and R4is hydrogen.

[0701] Typically in accordance with the seventh exemplary embodiment, X2is N.

[0702] Typically in accordance with the seventh exemplary embodiment, Q1is S.

[0703] Most typically in accordance with the seventh exemplary embodiment, R12is selected from hydrogen or a methyl or fluoromethyl group, R3is hydrogen, R4is hydrogen, X2is N and Q1is S.

[0704] In an eighth exemplary embodiment, there is provided a compound of Formula (Xlb) : wherein : j is 1 or 2; k is 1 or 2; p is 0, 1 or 2; and q is 1 or 2; provided that: j + k = 2 or 3; and p + q = 2 or 3; and wherein :

[0705] R15is selected from hydrogen or a C1-C4 alkyl, C3-C4 cycloalkyl, C1-C4 fluoroalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R150group;

[0706] R150is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group;

[0707] R3is selected from hydrogen or a C1-C3 alkyl, C1-C3 fluoroalkyl, C2-C3 alkenyl, C2-C3 fluoroalkenyl, cyclopropyl, fluorocyclopropyl, or -CO-R300group; R300is selected from a methyl, ethyl, fluoromethyl, fluoroethyl, ethenyl or fluoroethenyl group;

[0708] R4is selected from hydrogen or a methyl or fluoromethyl group;

[0709] X1is N;

[0710] X2is N or C-H; and

[0711] Q1is S or N-H.

[0712] Typically in accordance with the eighth exemplary embodiment, ] is 1, k is 1, p is 1 and q is 1.

[0713] Typically in accordance with the eighth exemplary embodiment, R15is selected from hydrogen or a methyl or fluoromethyl group.

[0714] Typically in accordance with the eighth exemplary embodiment, R3is selected from hydrogen or a methyl or fluoromethyl group and R4is hydrogen.

[0715] Typically in accordance with the eighth exemplary embodiment, X2is N.

[0716] Typically in accordance with the eighth exemplary embodiment, Q1is S.

[0717] Most typically in accordance with the eighth exemplary embodiment, j is 1, k is 1, p is 1, q is 1, R15is selected from hydrogen or a methyl or fluoromethyl group, R3is selected from hydrogen or a methyl or fluoromethyl group, R4is hydrogen, X2is N and Q1is S.

[0718] In a ninth exemplary embodiment, there is provided a compound of Formula (XIc): wherein : j is 1 or 2; k is 1 or 2; p is 0, 1 or 2; and q is 2 or 3; provided that: j + k = 3 or 4; and p + q = 3 or 4; and wherein :

[0719] R15is selected from hydrogen or a C1-C4 alkyl, C3-C4 cycloalkyl, C1-C4 fluoroalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R150group;

[0720] R150is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group;

[0721] R3is selected from hydrogen or a C1-C3 alkyl, C1-C3 fluoroalkyl, C2-C3 alkenyl, C2-C3 fluoroalkenyl, cyclopropyl, fluorocyclopropyl, or -CO-R300group;

[0722] R300is selected from a methyl, ethyl, fluoromethyl, fluoroethyl, ethenyl or fluoroethenyl group;

[0723] R4is selected from hydrogen or a methyl or fluoromethyl group;

[0724] X1is N;

[0725] X2is N or C-H; and

[0726] Q1is S or N-H.

[0727] Typically in accordance with the ninth exemplary embodiment, j is 1, k is 2, p is 2 and q is 2.

[0728] Typically in accordance with the ninth exemplary embodiment, R15is selected from hydrogen or a methyl or fluoromethyl group.

[0729] Typically in accordance with the ninth exemplary embodiment, R3is hydrogen and R4is hydrogen.

[0730] Typically in accordance with the ninth exemplary embodiment, X2is N.

[0731] Typically in accordance with the ninth exemplary embodiment, Q1is S.

[0732] Most typically in accordance with the ninth exemplary embodiment, j is 1, k is 2, p is 2, q is 2, R15is selected from hydrogen or a methyl or fluoromethyl group, R3is hydrogen, R4is hydrogen, X2is N and Q1is S.

[0733] In a tenth exemplary embodiment, there is provided a compound of Formula (XlVa): wherein :

[0734] R12is selected from hydrogen or a C1-C4 alkyl, C3-C4 cycloalkyl, C1-C4 fluoroalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R120group;

[0735] R120is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group; n is 1 or 2; the group -L3-NR31R32contains no more than 8 carbon atoms;

[0736] L3is a C2-C4 straight-chained alkylene group, wherein the alkylene group may optionally be substituted with one or more fluoro groups and / or one or two groups RL3;

[0737] R31is hydrogen or a methyl or fluoromethyl group;

[0738] R32is hydrogen or a methyl or fluoromethyl group; and each RL3is independently selected from a methyl or fluoromethyl group; or any RL3and R31may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups;

[0739] R4is selected from hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R400group;

[0740] R400is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group;

[0741] X1is N;

[0742] X2is N or C-H; and

[0743] Q1is S or N-H.

[0744] Typically in accordance with the tenth exemplary embodiment, R12is selected from hydrogen or a methyl or fluoromethyl group. Typically in accordance with the tenth exemplary embodiment, X2is N.

[0745] Typically in accordance with the tenth exemplary embodiment, Q1is S.

[0746] Most typically in accordance with the tenth exemplary embodiment, R12is selected from hydrogen or a methyl or fluoromethyl group, X2is N and Q1is S.

[0747] In an eleventh exemplary embodiment, there is provided a compound of Formula (XVIa) : wherein :

[0748] R12is selected from hydrogen or a C1-C4 alkyl, C3-C4 cycloalkyl, C1-C4 fluoroalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R120group;

[0749] R120is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group; n is 1 or 2; the group -CO-L31-NR31R32contains no more than 8 carbon atoms;

[0750] L31is a C2-C5 straight-chained alkylene group or a -CH2CH2-NH-CH2CH2- group, wherein the alkylene or the -CH2CH2-NH-CH2CH2- group may optionally be substituted with one or more fluoro groups and / or one or two groups RL3;

[0751] R31is hydrogen or a methyl or fluoromethyl group;

[0752] R32is hydrogen or a methyl or fluoromethyl group; and each RL3is independently selected from a methyl or fluoromethyl group; or any RL3and R31may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups; or R31and R32may, together with the nitrogen atom to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups;

[0753] R4is selected from hydrogen or a methyl or fluoromethyl group;

[0754] X1is N;

[0755] X2is N or C-H; and

[0756] Q1is S or N-H.

[0757] Typically in accordance with the eleventh exemplary embodiment, R12is selected from hydrogen or a methyl or fluoromethyl group.

[0758] Typically in accordance with the eleventh exemplary embodiment, R4is hydrogen.

[0759] Typically in accordance with the eleventh exemplary embodiment, X2is N.

[0760] Typically in accordance with the eleventh exemplary embodiment, Q1is S.

[0761] Most typically in accordance with the eleventh exemplary embodiment, R12is selected from hydrogen or a methyl or fluoromethyl group, R4is hydrogen, X2is N and Q1is S.

[0762] In a twelfth exemplary embodiment, there is provided a compound of Formula (XVIc):

[0763] Formula (XVIc) wherein : j is 1 or 2; k is 1 or 2; p is 0, 1 or 2; and q is 2 or 3; provided that: j + k = 3 or 4; and p + q = 3 or 4; and wherein :

[0764] R15is selected from hydrogen or a C1-C4 alkyl, C3-C4 cycloalkyl, C1-C4 fluoroalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R150group;

[0765] R150is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group; the group -CO-L31-NR31R32contains no more than 8 carbon atoms;

[0766] L31is a C2-C5 straight-chained alkylene group or a -CH2CH2-NH-CH2CH2- group, wherein the alkylene or the -CH2CH2-NH-CH2CH2- group may optionally be substituted with one or more fluoro groups and / or one or two groups RL3;

[0767] R31is hydrogen or a methyl or fluoromethyl group;

[0768] R32is hydrogen or a methyl or fluoromethyl group; and each RL3is independently selected from a methyl or fluoromethyl group; or any RL3and R31may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups; or R31and R32may, together with the nitrogen atom to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups;

[0769] R4is selected from hydrogen or a methyl or fluoromethyl group;

[0770] X1is N;

[0771] X2is N or C-H; and

[0772] Q1is S or N-H.

[0773] Typically in accordance with the twelfth exemplary embodiment, ] is 1, k is 2, p is 2 and q is 2.

[0774] Typically in accordance with the twelfth exemplary embodiment, R15is selected from hydrogen or a methyl or fluoromethyl group.

[0775] Typically in accordance with the twelfth exemplary embodiment, R4is hydrogen.

[0776] Typically in accordance with the twelfth exemplary embodiment, X2is N.

[0777] Typically in accordance with the twelfth exemplary embodiment, Q1is S. Most typically in accordance with the twelfth exemplary embodiment, j is 1, k is 2, p is 2, q is 2, R15is selected from hydrogen or a methyl or fluoromethyl group, R4is hydrogen, X2is N and Q1is S.

[0778] In a thirteenth exemplary embodiment, there is provided a compound of Formula (XVIIa): wherein :

[0779] R12is selected from hydrogen or a C1-C4 alkyl, C3-C4 cycloalkyl, C1-C4 fluoroalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R120group;

[0780] R120is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group; n is 1 or 2; the group -CO-NR41-L32-NR31R32contains no more than 10 carbon atoms;

[0781] L32is a C2-C4 straight-chained alkylene group, wherein the alkylene group may optionally be substituted with one or more fluoro groups and / or one or two groups RL3;

[0782] R31is hydrogen or a methyl or fluoromethyl group;

[0783] R32is hydrogen or a methyl or fluoromethyl group;

[0784] R41is hydrogen or a methyl or fluoromethyl group; and each RL3is independently selected from a methyl or fluoromethyl group; or any RL3and R31may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups; or any RL3and R41may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups; or any R31and R41may, together with the atoms to which they are attached, form a piperazinyl group, wherein the piperazinyl group may optionally be substituted with one or more fluoro groups;

[0785] R4is selected from hydrogen or a methyl or fluoromethyl group;

[0786] X1is N;

[0787] X2is N or C-H; and

[0788] Q1is S or N-H.

[0789] Typically in accordance with the thirteenth exemplary embodiment, R12is selected from hydrogen or a methyl or fluoromethyl group.

[0790] Typically in accordance with the thirteenth exemplary embodiment, R4is hydrogen.

[0791] Typically in accordance with the thirteenth exemplary embodiment, X2is N.

[0792] Typically in accordance with the thirteenth exemplary embodiment, Q1is S.

[0793] Most typically in accordance with the thirteenth exemplary embodiment, R12is selected from hydrogen or a methyl or fluoromethyl group, R4is hydrogen, X2is N and Q1is S.

[0794] In a fourteenth exemplary embodiment, there is provided a compound of Formula (XVIIb): wherein : j is 1 or 2; k is 1 or 2; p is 0, 1 or 2; and q is 1 or 2; provided that: j + k = 2 or 3; and p + q = 2 or 3; and wherein :

[0795] R15is selected from hydrogen or a C1-C4 alkyl, C3-C4 cycloalkyl, C1-C4 fluoroalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R150group;

[0796] R150is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group; the group -CO-NR41-L32-NR31R32contains no more than 10 carbon atoms;

[0797] L32is a C2-C4 straight-chained alkylene group, wherein the alkylene group may optionally be substituted with one or more fluoro groups and / or one or two groups RL3;

[0798] R31is hydrogen or a methyl or fluoromethyl group;

[0799] R32is hydrogen or a methyl or fluoromethyl group;

[0800] R41is hydrogen or a methyl or fluoromethyl group; and each RL3is independently selected from a methyl or fluoromethyl group; or any RL3and R31may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups; or any RL3and R41may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups; or R31and R41may, together with the atoms to which they are attached, form a piperazinyl group, wherein the piperazinyl group may optionally be substituted with one or more fluoro groups;

[0801] R4is selected from hydrogen or a methyl or fluoromethyl group;

[0802] X1is N;

[0803] X2is N or C-H; and

[0804] Q1is S or N-H.

[0805] Typically in accordance with the fourteenth exemplary embodiment, ] is 1, k is 1, p is 1 and q is 1. Typically in accordance with the fourteenth exemplary embodiment, R15is selected from hydrogen or a methyl or fluoromethyl group.

[0806] Typically in accordance with the fourteenth exemplary embodiment, R4is hydrogen.

[0807] Typically in accordance with the fourteenth exemplary embodiment, X2is N.

[0808] Typically in accordance with the fourteenth exemplary embodiment, Q1is S.

[0809] Most typically in accordance with the fourteenth exemplary embodiment, j is 1, k is 1, p is 1, q is 1, R15is selected from hydrogen or a methyl or fluoromethyl group, R4is hydrogen, X2is N and Q1is S.

[0810] In a fifteenth exemplary embodiment, there is provided a compound of Formula (XVIIIa): wherein :

[0811] R12is selected from hydrogen or a C1-C4 alkyl, C3-C4 cycloalkyl, C1-C4 fluoroalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R120group;

[0812] R120is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group; n is 1 or 2; the group -CO-L36-OR35contains no more than 8 carbon atoms;

[0813] L36is a C2-C5 straight-chained alkylene group or a -CH2CH2-NH-CH2CH2- group, wherein the alkylene or the -CH2CH2-NH-CH2CH2- group is substituted with one group RL3, and wherein the alkylene or the -CH2CH2-NH-CH2CH2- group may optionally be further substituted with one or more fluoro groups;

[0814] RL3and R35, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups;

[0815] R4is selected from hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl, -CO-R400or -CH2CH2N(R44)2group;

[0816] R400is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group; each R44is independently selected from hydrogen or a methyl or fluoromethyl group;

[0817] X1is N;

[0818] X2is N or C-H; and

[0819] Q1is S or N-H.

[0820] Typically in accordance with the fifteenth exemplary embodiment, R12is selected from hydrogen or a methyl or fluoromethyl group.

[0821] Typically in accordance with the fifteenth exemplary embodiment, R4is hydrogen.

[0822] Typically in accordance with the fifteenth exemplary embodiment, X2is N.

[0823] Typically in accordance with the fifteenth exemplary embodiment, Q1is S.

[0824] Most typically in accordance with the fifteenth exemplary embodiment, R12is selected from hydrogen or a methyl or fluoromethyl group, R4is hydrogen, X2is N and Q1is S.

[0825] In a sixteenth exemplary embodiment, there is provided a compound of Formula

[0826] (XIXa):

[0827] Formula (XIXa) wherein : R12is selected from hydrogen or a C1-C4 alkyl, C3-C4 cycloalkyl, C1-C4 fluoroalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R120group;

[0828] R120is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group; n is 1 or 2;

[0829] L31is a -CH2-, -CHMe- or -CMe?- group, wherein any -CH2-, -CHMe- or -CMe2- group may optionally be fluoro substituted;

[0830] R30is a 5- or 6-membered heteroaryl group, wherein the 5- or 6-membered heteroaryl group contains at least one ring nitrogen atom, and wherein the 5- or 6- membered heteroaryl group may optionally be substituted with one or more fluoro, chloro and / or bromo groups, and / or with a single -R301group;

[0831] R301is selected from a -CH2-R302or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups;

[0832] R302is a phenyl group, wherein the phenyl group may optionally be substituted with one or more fluoro, chloro and / or bromo groups;

[0833] R4is selected from hydrogen or a methyl or fluoromethyl group;

[0834] X1is N;

[0835] X2is N or C-H; and

[0836] Q1is S or N-H.

[0837] Typically in accordance with the sixteenth exemplary embodiment, R12is selected from hydrogen or a methyl or fluoromethyl group.

[0838] Typically in accordance with the sixteenth exemplary embodiment, R301is selected from a methyl or fluoromethyl group.

[0839] Typically in accordance with the sixteenth exemplary embodiment, R4is hydrogen.

[0840] Typically in accordance with the sixteenth exemplary embodiment, X2is N.

[0841] Typically in accordance with the sixteenth exemplary embodiment, Q1is S.

[0842] Most typically in accordance with the sixteenth exemplary embodiment, R12is selected from hydrogen or a methyl or fluoromethyl group, R301is selected from a methyl or fluoromethyl group, R4is hydrogen, X2is N and Q1is S. In a seventeenth exemplary embodiment, there is provided a compound of Formula (XlXb): wherein : j is 1 or 2; k is 1 or 2; p is 0, 1 or 2; and q is 1 or 2; provided that: j + k = 2 or 3; and p + q = 2 or 3; and wherein :

[0843] R15is selected from hydrogen or a C1-C4 alkyl, C3-C4 cycloalkyl, C1-C4 fluoroalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R150group;

[0844] R150is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group;

[0845] R30is selected from:

[0846] (i) a 6-membered heteroaryl group, wherein the 6-membered heteroaryl group contains at least one ring nitrogen atom, and wherein the 6-membered heteroaryl group may optionally be substituted with one or more fluoro, chloro and / or bromo groups, and / or with a single group independently selected from a -NH2, -R301, -NHR301or -N(R301)2 group; or

[0847] (ii) a phenyl group, wherein the phenyl group is substituted with a single -NH2, -NHR301or -N(R301)2group, and wherein the phenyl group may optionally be further substituted with one or more fluoro, chloro and / or bromo groups; each R301group is independently selected from a methyl or fluoromethyl group; R4is selected from hydrogen or a methyl or fluoromethyl group;

[0848] X1is N;

[0849] X2is N or C-H; and Q1is S or N-H.

[0850] Typically in accordance with the seventeenth exemplary embodiment, j is 1, k is 1, p is 1 and q is 1.

[0851] Typically in accordance with the seventeenth exemplary embodiment, R15is selected from hydrogen or a methyl or fluoromethyl group.

[0852] Typically in accordance with the seventeenth exemplary embodiment, X2is N.

[0853] Typically in accordance with the seventeenth exemplary embodiment, Q1is S.

[0854] Most typically in accordance with the seventeenth exemplary embodiment, j is 1, k is 1, p is 1, q is 1, R15is selected from hydrogen or a methyl or fluoromethyl group, X2is N and Q1is S.

[0855] In an eighteenth exemplary embodiment, there is provided a compound of Formula

[0856] (XXb): wherein : j is 1 or 2; k is 1 or 2; p is 0, 1 or 2; and q is 1 or 2; provided that: j + k = 2 or 3; and p + q = 2 or 3; and wherein : R15is selected from hydrogen or a C1-C4 alkyl, C3-C4 cycloalkyl, C1-C4 fluoroalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R150group;

[0857] R150is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group;

[0858] X1is N;

[0859] X2is N or C-H; and

[0860] Q1is S or N-H.

[0861] Typically in accordance with the eighteenth exemplary embodiment, j is 1, k is 1, p is 1 and q is 1.

[0862] Typically in accordance with the eighteenth exemplary embodiment, R15is selected from hydrogen or a methyl or fluoromethyl group.

[0863] Typically in accordance with the eighteenth exemplary embodiment, X2is N.

[0864] Typically in accordance with the eighteenth exemplary embodiment, Q1is N-H.

[0865] Most typically in accordance with the eighteenth exemplary embodiment, j is 1, k is 1, p is 1, q is 1, R15is selected from hydrogen or a methyl or fluoromethyl group, X2is N and Q1is N-H.

[0866] In one aspect of any of the above embodiments, the compound of the first aspect of the invention has a molecular weight of from 250 to 1000 Da. Typically, the compound of the first aspect of the invention has a molecular weight of from 300 to 750 Da.

[0867] More typically, the compound of the first aspect of the invention has a molecular weight of from 350 to 600 Da.

[0868] A second aspect of the invention provides a compound selected from the group consisting of:

[0869]

[0870] - VZI -

[0871]

[0872] 

[0873] A third aspect of the invention provides a pharmaceutically acceptable salt and / or solvate and / or prodrug of any compound of the first or second aspect of the invention.

[0874] In one embodiment, the third aspect of the invention provides a pharmaceutically acceptable salt and / or solvate of any compound of the first or second aspect of the invention. For example, the third aspect of the invention may provide (i) a pharmaceutically acceptable salt of any compound of the first or second aspect of the invention, or (ii) a pharmaceutically acceptable solvate of any compound of the first or second aspect of the invention, or (iii) a pharmaceutically acceptable solvate of a pharmaceutically acceptable salt of any compound of the first or second aspect of the invention.

[0875] The compounds of the present invention can be used both, in their free base form and their acid addition salt form. For the purposes of this invention, a "salt" of a compound of the present invention includes an acid addition salt. Acid addition salts are preferably pharmaceutically acceptable, non-toxic addition salts with suitable acids, including but not limited to inorganic acids such as hydrohalogenic acids (for example, hydrofluoric, hydrochloric, hydrobromic or hydroiodic acid) or other inorganic acids (for example, nitric, perchloric, sulfuric or phosphoric acid); or organic acids such as organic carboxylic acids (for example, propionic, butyric, glycolic, lactic, mandelic, citric, acetic, trifluoroacetic, benzoic, salicylic, succinic, malic or hydroxysuccinic, tartaric, fumaric, maleic, hydroxymaleic, mucic or galactaric, gluconic, pantothenic or pamoic acid), organic sulfonic acids (for example, methanesulfonic, trifluoromethanesulfonic, ethanesulfonic, 2-hydroxyethanesulfonic, benzenesulfonic, toluene-p-sulfonic, naphthalene-2-sulfonic or camphorsulfonic acid) or amino acids (for example, ornithinic, glutamic or aspartic acid). The acid addition salt may be a mono-, di-, tri- or multi-acid addition salt. A preferred salt is a hydrohalogenic, sulfuric, phosphoric or organic acid addition salt. A preferred salt is a hydrochloric acid addition salt.

[0876] Where a compound of the invention includes a quaternary ammonium group, typically the compound is used in its salt form. The counter ion to the quaternary ammonium group may be any pharmaceutically acceptable, non-toxic counter ion. Examples of suitable counter ions include the conjugate bases of the protic acids discussed above in relation to acid addition salts.

[0877] The compounds of the present invention can also be used both, in their free acid form and their salt form. For the purposes of this invention, a "salt" of a compound of the present invention includes one formed between a protic acid functionality (such as a carboxylic acid group) of a compound of the present invention and a suitable cation. Suitable cations include, but are not limited to lithium, sodium, potassium, magnesium, calcium and ammonium. The salt may be a mono-, di-, tri- or multi-salt. Preferably the salt is a mono- or di-lithium, sodium, potassium, magnesium, calcium or ammonium salt. More preferably the salt is a mono-sodium salt or a monopotassium salt. Preferably any salt is a pharmaceutically acceptable non-toxic salt. However, in addition to pharmaceutically acceptable salts, other salts are included in the present invention, since they have potential to serve as intermediates in the purification or preparation of other, for example, pharmaceutically acceptable salts, or are useful for identification, characterisation or purification of the free acid or base.

[0878] The compounds and / or salts of the present invention may be anhydrous or in the form of a hydrate (e.g. a hemihydrate, monohydrate, dihydrate or trihydrate) or other solvate. Such other solvates may be formed with common organic solvents, including but not limited to, alcoholic solvents e.g. methanol, ethanol or isopropanol.

[0879] In one embodiment, the third aspect of the invention provides a prodrug of any compound of the first or second aspect of the invention. Similarly, the third aspect of the invention may provide a pharmaceutically acceptable salt and / or solvate of such a prodrug. For example, the third aspect of the invention may provide (i) a pharmaceutically acceptable salt of a prodrug, or (ii) a pharmaceutically acceptable solvate of a prodrug, or (iii) a pharmaceutically acceptable solvate of a pharmaceutically acceptable salt of a prodrug.

[0880] In some embodiments of the present invention, therapeutically inactive prodrugs are provided. Prodrugs are compounds which, when administered to a subject such as a human, are converted in whole or in part to a compound of the invention. In most embodiments, the prodrugs are pharmacologically inert chemical derivatives that can be converted in vivo to the active drug molecules to exert a therapeutic effect. Any of the compounds described herein can be administered as a prodrug to increase the activity, bioavailability, or stability of the compound or to otherwise alter the properties of the compound. Typical examples of prodrugs include compounds that have biologically labile protecting groups on a functional moiety of the active compound. Prodrugs include, but are not limited to, compounds that can be oxidized, reduced, aminated, deaminated, hydroxylated, dehydroxylated, hydrolyzed, dehydrolyzed, alkylated, dealkylated, acylated, deacylated, phosphorylated, and / or dephosphorylated to produce the active compound. The present invention also encompasses salts and solvates of such prodrugs as described above.

[0881] The compounds, salts, solvates and prodrugs of the present invention may be obtained in all grades of purity, for example via conventional techniques such as recrystallisation and / or column chromatography. For example, the compounds, salts, solvates and prodrugs of the present invention may be at least 90% pure, at least 95% pure, at least 99% pure, at least 99.5% pure or at least 99.9% pure, as measured by HPLC.

[0882] Alternately, the compounds, salts, solvates and prodrugs of the present invention may be at least 90% pure, at least 95% pure, at least 99% pure, at least 99.5% pure or at least 99.9% pure, as measured by LCMS.

[0883] Alternately still, the compounds, salts, solvates and prodrugs of the present invention may be at least 90% pure, at least 95% pure, at least 99% pure, at least 99.5% pure or at least 99.9% pure, as measured byXH NMR.

[0884] The compounds, salts, solvates and prodrugs of the present invention may contain at least one chiral centre. The compounds, salts, solvates and prodrugs may therefore exist in at least two isomeric forms. The present invention encompasses racemic mixtures of the compounds, salts, solvates and prodrugs of the present invention as well as enantiomerically enriched and substantially enantiomerically pure isomers. For the purposes of this invention, a "substantially enantiomerically pure" isomer of a compound comprises less than 5% of other isomers of the same compound, more typically less than 2%, and most typically less than 0.5% by weight.

[0885] The compounds, salts, solvates and prodrugs of the present invention may contain any stable isotope including, but not limited to12C,13C,1H,2H (D),14N,15N,16O,17O,18O,19F and127I, and any radioisotope including, but not limited toX1C,14C,3H (T),13N,15O,18F,123I,124I,125I and131I.

[0886] The compounds, salts, solvates and prodrugs of the present invention may be in any polymorphic or amorphous form.

[0887] A fourth aspect of the invention provides an antibody-drug conjugate comprising a compound of the first or second aspect of the invention, or a pharmaceutically acceptable salt and / or solvate and / or prodrug of the third aspect of the invention. For the avoidance of doubt, it will be understood that the compound, salt, solvate or prodrug needs to lose at least one atom such as a hydrogen atom in order to form the link to the antibody.

[0888] Typically, the compound, salt, solvate or prodrug of the present invention comprises a a -NH- group, a -NH2 group, a -OH group, or a -SH group, each of which can be used to link the compound, salt, solvate or prodrug to an antibody, with the loss of a hydrogen atom from the -NH-, NH2, -OH or -SH group. For example, the antibodydrug conjugate can have the Formula (IA), (IB), (IC), (ID) or (IE):

[0889] wherein LABis a linker, AB is an antibody, and Xx-X4, Ax-A6, Q1, Rx-R4, R11, R16, j, k, m, n, p, q, r and s are as defined in accordance with Formula (I).

[0890] In a particular embodiment, the antibody-drug conjugate has the Formula (VIA) :

[0891] Formula (VIA) wherein LABis a linker, AB is an antibody, and Xx-X4, Ax-A6, Q1, R1, R2, R4, L31and R31are as defined in accordance with Formula (I). Typical antibodies that may be used to prepare the antibody-drug conjugate of the fourth aspect of the invention are:

[0892] • Cetuximab

[0893] • Trastuzumab

[0894] • Brentuximab

[0895] • ado-Trastuzumab

[0896] • Polatuzumab

[0897] • Inotuzumab

[0898] • Gemtuzumab

[0899] • Sacituzumab

[0900] • Enfortumab

[0901] • Loncastuximab

[0902] • fam-Trastuzumab

[0903] • Tisotumab

[0904] • Belantamab

[0905] • Mirvetuximab

[0906] • Amivantamab

[0907] Thus, where the antibody-drug conjugate has the Formula (IA), (IB), (IC), (ID), (IE) or (VIA), the antibody AB may be selected from any of the above.

[0908] The linker LABis typically a C20-C100 saturated or unsaturated hydrocarbylene group, wherein the hydrocarbylene group may be straight-chained or branched, or be or include one or more cyclic groups, wherein the hydrocarbylene group may optionally be substituted with one or more halo and / or -NO2 groups, wherein the hydrocarbylene group may optionally include one or more heteroatoms each independently selected from N, O and S in its carbon skeleton, and wherein any -S- moiety in the hydrocarbylene group may optionally be substituted with one or two groups each independently selected from oxo (=0) and =NH to form a -SO-, -SO2-, -S(=NH)- or -SO(=NH)- moiety.

[0909] More typically, the linker LABis a C30-C70 or C40-C60 partially unsaturated hydrocarbylene group, wherein the hydrocarbylene group may be straight-chained or branched, or be or include one, two, three, four, five or six cyclic groups, wherein the hydrocarbylene group may optionally be substituted with one or more halo groups, wherein the hydrocarbylene group includes from 10 to 30 oxygen atoms, from 5 to 15 nitrogen atoms and from 0 to 5 sulphur atoms in its carbon skeleton, wherein any -S- moiety in the hydrocarbylene group may optionally be substituted with one or two groups each independently selected from oxo (=0) and =NH to form a -SO-, -SO2-, -S( = NH)- or -SO( = NH)- moiety.

[0910] Typically, the linker LABcomprises a maleimide moiety, one or more PEG spacers, optionally a BCN moiety, a valine-citrulline (Val-Cit) dipeptide, and a paraaminobenzyl (PAB) spacer.

[0911] Typically, the hydrocarbylene group of linker LABhas a chain length of from 20 to 80 atoms. More typically, the hydrocarbylene group has a chain length of from 30 to 70 atoms, or from 40 to 60 atoms.

[0912] As will be understood, the "chain length" of a hydrocarbylene group refers to the number of atoms of the hydrocarbylene group that are bonded to each other in a continuous chain between the two points of attachment of the hydrocarbylene group to the remainder of the molecule, as measured by the shortest route. By way of example, structure (C) has a chain length between A and B of 3 atoms, whereas structure (D) has a chain length between A and B of 5 atoms:

[0913] Typical linkers that may be used to link a compound of the first or second aspect of the invention, or a pharmaceutically acceptable salt and / or solvate and / or prodrug of the third aspect of the invention, to an antibody to prepare the antibody-drug conjugate of the fourth aspect of the invention are: maleimide-valine-citruline-PABC, including those comprising PEG and / or a

[0914] BCN-derived moiety thioether hydrazone and disulfide

[0915] CL2a linker maleimide-valine-alanine-PABC maleimide tetrapeptide linker (GGFG)

[0916] Maleidocaproic linker

[0917] Sulfo-SPDB disulfide Thus, where the antibody-drug conjugate has the Formula (IA), (IB), (IC), (ID), (IE) or (VIA), the linker LABmay be selected from any of the above.

[0918] In one embodiment of the fourth aspect of the invention, the antibody-drug conjugate is selected from:

[0919] Cetuximab-Mal-PEG8-VC-N-[4-(4-methyl-l,4-diazepan-l-yl)-8-oxo-ll-thia- l,3,5-triazatetracyclo[8.7.0.02,7.012,17]heptadeca-2(7),3,5,9,12(17),13,15- heptaen -9-yl] 3-(l-piperazinyl) propionamide; or Cetuximab-Mal-PEG8-VC-N-{4-(4-methyl-l,4-diazepan-l-yl)-8-oxo-ll-thia- l,3,5-triazatetracyclo[8.7.0.02,7.012,17]heptadeca-2(7),3,5,9,12(17),13,15- heptaen-9-yl}(2-piperidyl)acetamide; or a pharmaceutically acceptable salt and / or solvate thereof.

[0920] A fifth aspect of the invention provides a pharmaceutical composition comprising a compound of the first or second aspect of the invention, or a pharmaceutically acceptable salt and / or solvate and / or prodrug of the third aspect of the invention, or an antibody-drug conjugate of the fourth aspect of the invention, and a pharmaceutically acceptable excipient.

[0921] Conventional procedures for the selection and preparation of suitable pharmaceutical formulations are described in, for example, "Aulton's Pharmaceutics - The Design and Manufacture of Medicines", M. E. Aulton and K. M. G. Taylor, Churchill Livingstone Elsevier, 4thEd., 2013.

[0922] Pharmaceutically acceptable excipients including adjuvants, diluents or carriers that may be used in the pharmaceutical compositions of the invention are those conventionally employed in the field of pharmaceutical formulation, and include, but are not limited to, sugars, sugar alcohols, starches, ion exchangers, alumina, aluminium stearate, lecithin, serum proteins such as human serum albumin, buffer substances such as phosphates, glycerine, sorbic acid, potassium sorbate, partial glyceride mixtures of saturated vegetable fatty acids, water, salts or electrolytes such as protamine sulfate, disodium hydrogen phosphate, potassium hydrogen phosphate, sodium chloride, zinc salts, colloidal silica, magnesium trisilicate, polyvinylpyrrolidone, cellulose-based substances, polyethylene glycol, sodium carboxymethylcellulose, polyacrylates, waxes, polyethylene-polyoxypropylene-block polymers, polyethylene glycol and wool fat. A sixth aspect of the invention provides a compound of the first or second aspect of the invention, or a pharmaceutically acceptable salt and / or solvate and / or prodrug of the third aspect of the invention, or an antibody-drug conjugate of the fourth aspect of the invention, or a pharmaceutical composition of the fifth aspect of the invention, for use in medicine, and / or for use in the treatment or prevention of a disease, disorder or condition. Typically, the use comprises the administration of the compound, salt, solvate, prodrug, antibody-drug conjugate or pharmaceutical composition to a subject.

[0923] The term "treatment" as used herein refers equally to curative therapy, and ameliorating or palliative therapy. The term includes obtaining beneficial or desired physiological results, which may or may not be established clinically. Beneficial or desired clinical results include, but are not limited to, the alleviation of symptoms, the prevention of symptoms, the diminishment of extent of disease, the stabilisation (i.e., not worsening) of a condition, the delay or slowing of progression / worsening of a condition / symptom, the amelioration or palliation of a condition / symptom, and remission (whether partial or total), whether detectable or undetectable. The term "palliation", and variations thereof, as used herein, means that the extent and / or undesirable manifestations of a physiological condition or symptom are lessened and / or time course of the progression is slowed or lengthened, as compared to not administering a compound, salt, solvate, prodrug, antibody-drug conjugate or pharmaceutical composition of the present invention. The term "prevention" as used herein in relation to a disease, disorder or condition, relates to prophylactic or preventative therapy, as well as therapy to reduce the risk of developing the disease, disorder or condition. The term "prevention" includes both the avoidance of occurrence of the disease, disorder or condition, and the delay in onset of the disease, disorder or condition. Any statistically significant (p < 0.05) avoidance of occurrence, delay in onset or reduction in risk as measured by a controlled clinical trial may be deemed a prevention of the disease, disorder or condition. Subjects amenable to prevention include those at heightened risk of a disease, disorder or condition as identified by genetic or biochemical markers. Typically, the genetic or biochemical markers are appropriate to the disease, disorder or condition under consideration.

[0924] A seventh aspect of the invention provides the use of a compound of the first or second aspect of the invention, or a pharmaceutically acceptable salt and / or solvate and / or prodrug of the third aspect of the invention, or an antibody-drug conjugate of the fourth aspect of the invention, in the manufacture of a medicament for the treatment or prevention of a disease, disorder or condition. Typically, the treatment or prevention comprises the administration of the compound, salt, solvate, prodrug, antibody-drug conjugate or medicament to a subject.

[0925] An eighth aspect of the invention provides a method of treatment or prevention of a disease, disorder or condition, the method comprising the step of administering an effective amount of a compound of the first or second aspect of the invention, or a pharmaceutically acceptable salt and / or solvate and / or prodrug of the third aspect of the invention, or an antibody-drug conjugate of the fourth aspect of the invention, or a pharmaceutical composition of the fifth aspect of the invention, to thereby treat or prevent the disease, disorder or condition. Typically, the administration is to a subject in need thereof.

[0926] A ninth aspect of the invention provides a compound of the first or second aspect of the invention, or a pharmaceutically acceptable salt and / or solvate and / or prodrug of the third aspect of the invention, or an antibody-drug conjugate of the fourth aspect of the invention, or a pharmaceutical composition of the fifth aspect of the invention, for use in the treatment or prevention of a cancer. Typically, the use comprises the administration of the compound, salt, solvate, prodrug, antibody-drug conjugate or pharmaceutical composition to a subject.

[0927] A tenth aspect of the invention provides the use of a compound of the first or second aspect of the invention, or a pharmaceutically acceptable salt and / or solvate and / or prodrug of the third aspect of the invention, or an antibody-drug conjugate of the fourth aspect of the invention, in the manufacture of a medicament for the treatment or prevention of a cancer. Typically, the treatment or prevention comprises the administration of the compound, salt, solvate, prodrug, antibody-drug conjugate or medicament to a subject.

[0928] An eleventh aspect of the invention provides a method of treatment or prevention of a cancer, the method comprising the step of administering an effective amount of a compound of the first or second aspect of the invention, or a pharmaceutically acceptable salt and / or solvate and / or prodrug of the third aspect of the invention, or an antibody-drug conjugate of the fourth aspect of the invention, or a pharmaceutical composition of the fifth aspect of the invention, to thereby treat or prevent the cancer. Typically, the administration is to a subject in need thereof.

[0929] The compound of the first or second aspect of the invention, or the pharmaceutically acceptable salt and / or solvate and / or prodrug of the third aspect of the invention, or the antibody-drug conjugate of the fourth aspect of the invention, or the pharmaceutical composition of the fifth aspect of the invention can be combined with other therapeutic agents and treatments, for example, to exploit synergies and enhance the cytotoxic activity in cancer treatment. For example, the compound, salt, solvate, prodrug, antibody-drug conjugate or pharmaceutical composition can used in combination with X-ray radiation; DNA alkylating agents like cisplatin; NU7441, an inhibitor of DNA repair regulating kinase DNA-PK; MK1775, an inhibitor of the cell cycle regulator WEE1 kinase; Pimozide, an inhibitor of the deubiquitinylation enzyme USP1; NSC697923, an inhibitor of ubiquitin conjugating enzyme UBE2N; APR-246, a P53 activator; PARP inhibitors; topoisomerase 1 knockdown; HDAC inhibitors; lysosome inhibitors; and immunomodulators.

[0930] Unless stated otherwise, in any of the sixth to eleventh aspects of the invention, the subject may be any human or other animal. Typically, the subject is a mammal, more typically a human or a domesticated mammal such as a cow, pig, lamb, sheep, goat, horse, cat, dog, rabbit, mouse etc. Most typically, the subject is a human.

[0931] Any of the medicaments employed in the present invention can be administered by oral, parenteral (including intravenous, subcutaneous, intramuscular, intradermal, intratracheal, intraperitoneal, intraarticular, intracranial and epidural), airway (aerosol), rectal, vaginal, ocular or topical (including transdermal, buccal, mucosal, sublingual and topical ocular) administration.

[0932] Typically, the mode of administration selected is that most appropriate to the disorder, disease or condition to be treated or prevented.

[0933] For oral administration, the compounds, salts, solvates, prodrugs or antibody-drug conjugates of the present invention will generally be provided in the form of tablets, capsules, hard or soft gelatine capsules, caplets, troches or lozenges, as a powder or granules, or as an aqueous solution, suspension or dispersion.

[0934] Tablets for oral use may include the active ingredient mixed with pharmaceutically acceptable excipients such as inert diluents, disintegrating agents, binding agents, lubricating agents, sweetening agents, flavouring agents, colouring agents and preservatives. Suitable inert diluents include sodium and calcium carbonate, sodium and calcium phosphate, and lactose. Corn starch and alginic acid are suitable disintegrating agents. Binding agents may include starch and gelatine. The lubricating agent, if present, may be magnesium stearate, stearic acid or talc. If desired, the tablets may be coated with a material, such as glyceryl monostearate or glyceryl distearate, to delay absorption in the gastrointestinal tract. Tablets may also be effervescent and / or dissolving tablets.

[0935] Capsules for oral use include hard gelatine capsules in which the active ingredient is mixed with a solid diluent, and soft gelatine capsules wherein the active ingredient is mixed with water or an oil such as peanut oil, liquid paraffin or olive oil.

[0936] Powders or granules for oral use may be provided in sachets or tubs. Aqueous solutions, suspensions or dispersions may be prepared by the addition of water to powders, granules or tablets.

[0937] Any form suitable for oral administration may optionally include sweetening agents such as sugar, flavouring agents, colouring agents and / or preservatives.

[0938] Formulations for rectal administration may be presented as a suppository with a suitable base comprising, for example, cocoa butter or a salicylate.

[0939] Formulations suitable for vaginal administration may be presented as pessaries, tampons, creams, gels, pastes, foams or spray formulations containing in addition to the active ingredient such carriers as are known in the art to be appropriate.

[0940] For parenteral use, the compounds, salts, solvates, prodrugs or antibody-drug conjugates of the present invention will generally be provided in a sterile aqueous solution or suspension, buffered to an appropriate pH and isotonicity. Suitable aqueous vehicles include Ringer's solution and isotonic sodium chloride or glucose. Aqueous suspensions according to the invention may include suspending agents such as cellulose derivatives, sodium alginate, polyvinylpyrrolidone and gum tragacanth, and a wetting agent such as lecithin. Suitable preservatives for aqueous suspensions include ethyl and n-propyl p-hydroxybenzoate. The compounds of the invention may also be presented as liposome formulations.

[0941] For ocular administration, the compounds, salts, solvates, prodrugs or antibody-drug conjugates of the invention will generally be provided in a form suitable for topical administration, e.g. as eye drops. Suitable forms may include ophthalmic solutions, gel-forming solutions, sterile powders for reconstitution, ophthalmic suspensions, ophthalmic ointments, ophthalmic emulsions, ophthalmic gels and ocular inserts. Alternatively, the compounds, salts, solvates or prodrugs of the invention may be provided in a form suitable for other types of ocular administration, for example as intraocular preparations (including as irrigating solutions, as intraocular, intravitreal or juxtascleral injection formulations, or as intravitreal implants), as packs or corneal shields, as intracameral, subconjunctival or retrobulbar injection formulations, or as iontophoresis formulations.

[0942] For transdermal and other topical administration, the compounds, salts, solvates, prodrugs or antibody-drug conjugates of the invention will generally be provided in the form of ointments, cataplasms (poultices), pastes, powders, dressings, creams, plasters or patches.

[0943] Suitable suspensions and solutions can be used in inhalers for airway (aerosol) administration.

[0944] The dose of the compounds, salts, solvates, prodrugs or antibody-drug conjugates of the present invention will, of course, vary with the disease, disorder or condition to be treated or prevented. In general, a suitable dose will be in the range of 0.01 to 500 mg per kilogram body weight of the recipient per day. The desired dose may be presented at an appropriate interval such as once every other day, once a day, twice a day, three times a day or four times a day. The desired dose may be administered in unit dosage form, for example, containing 1 mg to 50 g of active ingredient per unit dosage form.

[0945] All citations are incorporated herein by reference in their entirety.

[0946] For the avoidance of doubt, insofar as is practicable any embodiment of a given aspect of the present invention may occur in combination with any other embodiment of the same aspect of the present invention. In addition, insofar as is practicable it is to be understood that any preferred, typical or optional embodiment of any aspect of the present invention should also be considered as a preferred, typical or optional embodiment of any other aspect of the present invention.

[0947] References

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[0951] 5. Marsico, G. et al. Whole genome experimental maps of DNA G-quadruplexes in multiple species. Nucleic Acids Res. 47, 3862-3874 (2019).

[0952] 6. Biffi, G., Tannahill, D., McCafferty, J. & Balasubramanian, S. Quantitative visualization of DNA G-quadruplex structures in human cells. Nat. Chem. 5, 182-186 (2013).

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[0954] 8. Biffi, G., Di Antonio, M., Tannahill, D. & Balasubramanian, S. Visualization and selective chemical targeting of RNA G-quadruplex structures in the cytoplasm of human cells. Nat. Chem. 6, 75-80 (2014).

[0955] 9. Hansel-Hertsch, R. et al. G-quadruplex structures mark human regulatory chromatin. Nat. Genet. 48, 1267-1272 (2016).

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[0958] 12. Lyu, J., Shao, R., Kwong Yung, P. Y. & Elsasser, S. J. Genome-wide mapping of G-quadruplex structures with CUT&Tag. Nucleic Acids Res. 1-13 (2021) doi: 10.1093 / nar / gkabl073.

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[0978] Examples - Compound Synthesis

[0979] All solvents, reagents and compounds were purchased and used without further purification unless stated otherwise. NMR:XH NMR,13C NMR spectra and 2D NMR spectra were recorded on a Bruker Avance Neo 400 MHz NMR spectrometer at 25°C in CDCH / MeOD / DMSO-cfe / DMSO- C / 6+D2O, respectively, residual undeuterated solvent as internal reference. Chemical shifts (6) are expressed in ppm and coupling constants (J) are given in Hz.

[0980] LCMS method: All final compounds were purified to >95% purity as determined Shimadzu LC-20AD XR&MS 2020 with UV detection at 220 nm using the following method: Halo C18 column (5.0 pm, 3.0 mm x 30 mm), eluting with binary solvent systems A and B using a 5-95% B over 3.0 minutes gradient elution [A, H2O with 0.04% TFA; B, CH3CN with 0.02% TFA]; flow rate 1.0 mL / min. Mass spectral data were recorded on an Shimadzu LC-20AD XR&MS 2020 with UV detection, ESI.

[0981] Preparative HPLC method:

[0982] TFA as buffer Preparative reversed-phase high pressure liquid chromatography (RP-

[0983] HPLC) was performed using a Gilson 281 Semi-preparative HPLC system and Phenomenex Luna C18 column (5 pm, 100 mm x 40 mm), eluting with binary solvent systems A and B using a gradient elution [A, H2O with 0.1% TFA; B, CH3CN] with UV detection at 220 nm.

[0984] HCI as buffer Preparative reversed-phase high pressure liquid chromatography (RP-

[0985] HPLC) was performed using a Gilson 281 Semi-preparative HPLC system and Phenomenex Luna C18 column (5 pm, 100 mm x 40 mm), eluting with binary solvent systems A and B using a gradient elution [A, H2O with 0.04% HCI; B, CH3CN] with UV detection at 220 nm.

[0986] NH4HCO3 as buffer Preparative reversed-phase high pressure liquid chromatography

[0987] (RP-HPLC) was performed using a Gilson 281 Semi-preparative HPLC system and Waters Xbridge Prep OBD C18 (10 pm, 150 mm x 40 mm), eluting with binary solvent systems A and B using a gradient elution [A, H2O with lOmM NH4HCO3; B, CH3CN] with UV detection at 220 nm.

[0988] Synthetic Route 1

[0989] Example 1: 9-Amino-4-(4-methyl-l,4-diazepan-l-yl)-ll-thia-l,3,5- triazatetracyclo[8.7.0.02,7.012,17]heptadeca-2(7),3,5,9,12,14,16-heptaen-8- one

[0990] 2,4-Dichloropyrimidine-5-carbonyl chloride: A mixture of acid (1.00 g, 5.18 mmol, 1 eq) in SOCI2 (10.00 mL) was stirred at 65 °C for 12 h. TLC showed the reaction was completed. The mixture was concentrated in vacuum to give the desired product (1.00 g, 4.73 mmol, 91.28% yield) as a yellow solid. The crude product was used in the next step without further purification.

[0991] Ethyl 4-chloro-8-oxo-ll-thia-l,3,5-triazatetracyclo[8.7.0.02,7.012,17]- heptadeca-2(7),3,5,9, 12, 14, 16-heptaene-9-carboxylate : To a mixture of acid chloride (0.5 g, 2.26 mmol, 1 eq) and MgCH (322.71 mg, 3.39 mmol, 139 pL, 1.5 eq) in MeCN (10.00 mL) was added ethyl 2-(l,3-benzothiazol-2-yl)acetate (621.09 mg, 2.94 mmol, 1.3 eq) and TEA (457.30 mg, 4.52 mmol, 629.02 pL, 2 eq) at -10 °C under N2. The mixture was stirred at 20 °C for 2 h, then to the mixture was added DIEA (457.30 mg, 4.52 mmol, 629.02 pL, 2 eq) and the reaction heated to 25 °C and stirred for 10 h. LCMS showed the reaction was completed. The mixture was concentrated and the residue was triturated with MeCN (10 mL). The mixture was filtered and the solid was collected to give the title compound (0.22 g, 0.611 mmol, 27.06% yield) as a yellow solid. The crude product was used in the next step without further purification.1H NMR (400 MHz, CDCI3) 6 = 9.63 (s, 1H), 9.37 (br d, J= 8.3 Hz, 1H), 7.75 (br d, J= 7.6 Hz, 1H), 7.64 - 7.56 (m, 1H), 7.54 - 7.45 (m, 1H), 4.50 (q, J= 7.0 Hz, 2H), 1.49 (br t, J= 7.0 Hz, 3H). Ethyl 4-(4-methyl-l,4-diazepan-l-yl)-8-oxo-ll-thia-l,3,5-triazatetracyclo- [8.7.0.02,7.012,17]heptadeca-2(7),3,5,9,12,14,16-heptaene-9-carboxylate: To a mixture of ester (0.17 g, 472.51 pmol, 1 eq) in MeCN (5.00 mL) was added 1- methyl-l,4-diazepane (107.91 mg, 0.946 mmol, 2 eq) at 25 °C under N2. The mixture was stirred at 25 °C for 12 h. LCMS showed the reaction was completed. The mixture was concentrated in vacuum. The residue was triturated with MeCN (20 mL) for 10 min. Then the mixture was filtered and the solid was collected to afford the title compound (0.14 g, 319.99 pmol, 67.72% yield) as a yellow solid. LCMS (ESI+): m / z 438.4 (M + H)+, Rt: 0.466 min.

[0992] 4-(4-Methyl-l,4-diazepan-l-yl)-8-oxo-ll-thia-l,3,5-triazatetracyclo- [8.7.0.02,7.012,17]heptadeca-2(7),3,5,9,12,14,16-heptaene-9- carbohydrazide: To a solution of ethyl 4-(4-methyl-l,4-diazepan-l-yl)-8-oxo-ll- thia-l,3,5-triazatetracyclo[8.7.0.02,7.012,17]heptadeca-2(7),3,5,9,12,14,16- heptaene-9-carboxylate (5 g, 11.43 mmol, 1 eq) in EtOH (50 mL) was added hydrazine (732.45 mg, 22.86 mmol, 2 eq) at 0 °C under N2. The reaction was heated to 50 °C and stirred for 2 h. The mixture was quenched by H2O (50 mL) at 0 °C before being extracted with dichloromethane (50 mL x 3). The combined organics were washed with saturated brine solution (50 mL x 2), dried over anhydrous sodium sulfate and concentrated in vacuum to give the title compound (2.8 g, 6.61 mmol, 57.85% yield) as a yellow solid. The crude product was used in the next step directly. LCMS (ESI+): m / z 424.2 (M + H)+, Rt: 0.275 min.

[0993] 4-(4-Methyl-l,4-diazepan-l-yl)-8-oxo-ll-thia-l,3,5-triazatetracyclo- [8.7.0.02,7.012,17]heptadeca-2(7),3,5,9,12,14,16-heptaene-9-carbonyl azide:

[0994] To a solution of hydrazide (800 mg, 1.89 mmol, 1 eq) in HCI (10 mL) was added NaNO? (260.69 mg, 3.78 mmol, 2 eq) at 0 °C. The reaction was warmed to 25 °C and stirred for 2 h. LCMS showed starting material was consumed and desired product was detected. The mixture was adjusted to pH 7 with saturated NaHCOs aqueous solution. The mixture was filtered to give the filter cake. The filter cake was collected and dried to give the desired compound (200 mg, 492.05 pmol, 26.05% yield) as a yellow solid. The crude product was used in the next step without further purification. LCMS (ESI+) : m / z 435.1 (M + H)+, Rt: 0.337 min.

[0995] 9-Amino-4-(4-methyl-l,4-diazepan-l-yl)-ll-thia-l,3,5-triazatetracyclo- [8.7.0.02,7.012,17]heptadeca-2(7),3,5,9,12,14,16-heptaen-8-one: A solution of acyl azide (200 mg, 492.05 pmol, 1 eq) in HCI (3 mL) was stirred at 25 °C for 48 h. LCMS showed the starting material was consumed and the desired product was detected. The reaction was concentrated in vacuum. The crude product was purified by prep-HPLC (HCI condition) to give 9-amino-4-(4-methyl-l,4-diazepan-l-yl)-ll- thia-l,3,5-triazatetracyclo[8.7.0.02,7.012,17]heptadeca-2(7),3,5,9,12,14,16-heptaen- 8-one (Example 1, 23.4 mg, 61.50 pmol, 12.50% yield) as a yellow solid. LCMS (ESI+) : Rt: 1.415 min, m / z 381.2 (M + H).XH NMR (400 MHz, DMSO-d6) 6 = 10.49 -

[0996] 10.29 (m, 1H), 9.32 - 9.04 (m, 2H), 7.97 (d, J = 7.9 Hz, 1H), 7.64 - 7.51 (m, 1H), 7.48 - 7.38 (m, 1H), 4.72 - 4.31 (m, 1H), 4.23 - 4.00 (m, 2H), 3.95 - 3.78 (m, 3H),

[0997] 3.29 - 3.20 (m, 2H), 2.81 (br d, J = 4.3 Hz, 3H), 2.43 - 2.11 (m, 2H).

[0998] The following examples were synthesised according to the method outlined in

[0999] Synthetic Route 1 using commercially available starting materials:

[1000] Synthetic Route 2

[1001] Example 5: tert-Butyl 3-{[4-(4-methyl-l,4-diazepan-l-yl)-8-oxo-ll-thia- l,3,5-triazatetracyclo[8.7.0.02,7.012,17]heptadeca-2(7),3,5,9,12,14,16- heptaen-9-yl]amino}pyrrolidine- 1-carboxylate

[1002] To a mixture of 9-amino-4-(4-methyl-l,4-diazepan-l-yl)-l l-thia-l,3,5- triazatetracyclo[8.7.0.02,7.012,17]heptadeca-2(7),3,5,9,12,14,16-heptaen-8-one (Example 1, 0.1 g, 262.84 pmol, 1 eq) and tert-butyl 3-oxopyrrolidine-l-carboxylate (146.05 mg, 788.51 pmol, 3 eq) in DMA (1 mL) and MeOH (1 mL) was added ZnCI? (57.32 mg, 420.54 pmol, 19.72 pL, 1.6 eq) and NaBHsCN (49.55 mg, 788.51 pmol, 3 eq) at 25 °C. The mixture was heated to 50 °C and stirred for 12 h. The mixture was poured into ice-water (5 mL), and then concentrated in vacuum. The crude product was purified by prep-HPLC to give the title compound (Example 5, 80 mg, 145.54 pmol, 55.37% yield) as a yellow solid. LCMS (ESI+) : m / z 550.4 (M + H) +, Rt: 0.393 min.

[1003] Example 6: 4-(4-Methyl-l,4-diazepan- 1-yl )-9-[ (pyrrol idin-3-yl)ami no] -11- thia- 1,3, 5-triazatetracyclo[8.7.0.02,7.012,x 7]heptadeca-2(7), 3, 5, 9,12,14,16- heptaen-8-one

[1004] A mixture of tert-butyl 3-{[4-(4-methyl-l,4-diazepan-l-yl)-8-oxo-ll-thia-l,3,5- triazatetracyclo[8.7.0.02,7.012,17] heptadeca -2(7), 3, 5, 9, 12, 14,16-heptaen-9- yl]amino}pyrrolidine-l-carboxylate (Example 5, 80 mg, 145.54 pmol, 1 eq) in HCI / dioxane (1 mL) was stirred at 25 °C for 2 h. The reaction mixture was concentrated in vacuum. The crude product was purified by prep-HPLC to give the title compound (Example 6, 31.3 mg, 69.62 pmol, 47.84% yield) as a yellow solid. LCMS (ESI+) : m / z 450.1 (M + H) +, Rt: 0.276 min.XH NMR (400 MHz, DMSO-d6) 6 = 11.40 - 11.09 (m, 1H), 9.38 (br d, J = 3.5 Hz, 1H), 9.29 - 8.96 (m, 3H), 7.92 (br d, J = 7.8 Hz, 1H), 7.65 - 7.51 (m, 1H), 7.44 (dt, J = 2.9, 7.5 Hz, 1H), 4.75 - 4.31 (m, 1H), 4.26 - 3.74 (m, 5H), 3.63 (br dd, J = 1.9, 12.5 Hz, 1H), 3.33 - 3.10 (m, 6H), 2.77 (d, J = 4.8 Hz, 3H), 2.49 - 2.14 (m, 2H), 2.05 - 1.78 (m, 2H). Intermediate 1: tert-Butyl N-(3-oxopropyl)carbamate

[1005] To a mixture of tert-butyl N-(3-hydroxypropyl)carbamate (1 g, 5.71 mmol, 975.61 pL, 1 eq) in DCM (10 mL) was added Dess-Martin (3.15 g, 7.42 mmol, 2.30 mL, 1.3 eq). Then the mixture was stirred at 25 °C for 2 h. TLC showed the starting material was consumed and a new spot was generated. The reaction was quenched by addition of 20 mL of NaHCOs. The aqueous phase was extracted with ethyl acetate (20 mL x 3). The crude product was purified by chromatography on a silica gel eluted with petroleum ether: ethyl acetate (from 10 / 1 to 5 / 1) to give the title compound (0.8 g, 4.62 mmol, 80.93% yield) as a white oil. The crude product was used in the next step directly.

[1006] The following example was synthesised according to the method outlined in Synthetic Route 2 using intermediate 1:

[1007] The following examples were synthesised according to the method outlined in

[1008] Synthetic Route 2 from corresponding intermediates:

[1009] Synthetic Route 3

[1010] Example 9: tert-Butyl 2-({[4-(4-methyl-l,4-diazepan-l-yl)-8-oxo-ll-thia- l,3,5-triazatetracyclo[8.7.0.02,7.012,17]heptadeca-2(7),3,5,9,12,14,16- heptaen-9-yl]carbamoyl}methyl)pyrrolidine- 1-carboxylate

[1011] To a mixture of 2-(l-tert-butoxycarbonylpyrrolidin-2-yl) acetic acid (241.04 mg, 1.05 mmol, 2 eq) in DMF (5.00 mL) was added HATU (399.75 mg, 1.05 mmol, 2 eq) and DIEA (203.82 mg, 1.58 mmol, 274.69 pL, 3 eq) dropwise at 0 °C. Then the reaction was stirred at 0 °C for 30 min. To the mixture was added 9-amino-4-(4-methyl-l,4- diazepan- 1-yl)- 11-th ia-l,3,5-triazatetracyclo[8.7.0.02,7.012,17]heptadeca- 2(7),3,5,9,12,14,16-heptaen-8-one (Example 1, 0.2 g, 525.67 pmol, 1 eq) in one portion at 0 °C. The mixture was warmed to 25 °C and stirred at 25 °C for 12 h. The mixture was quenched with water (30 mL) at 0 °C for 10 min. Then the mixture was filtered and the solid was collected. Then the solid was triturated with MeCN (3.00 mL) at 25 °C for 10 min. After being filtered, the filter cake was collected to give the title compound (Example 9, 0.15 g, 253.50 pmol, 48.22% yield) as yellow solid. LCMS (ESI+) : m / z 592.4 (M + H) +, Rt: 0.395min.

[1012] Example 10: N-[4-(4-Methyl-l,4-diazepan-l-yl)-8-oxo-ll-thia-l,3,5- triazatetracyclo[8.7.0.02,7.012,17]heptadeca-2(7),3,5,9,12,14,16-heptaen-9- yl]-2-(pyrrolidin-2-yl )acetamide:

[1013] A mixture of tert-butyl 2-({[4-(4-methyl-l,4-diazepan-l-yl)-8-oxo-ll-thia-l,3,5- triazatetracyclo[8.7.0.02, TO12,17] heptadeca -2(7), 3, 5, 9, 12, 14,16-heptaen-9- yl]carbamoyl}methyl)pyrrolidine-l-carboxylate (Example 9, 0.15 g, 253.50 pmol, 1 eq) in HCI / dioxane (4 M, 3.00 mL) was stirred at 25 °C for 2 h. LCMS showed the reaction was completed. Then the mixture was filtered and the filtrate was concentrated in vacuum. The crude product was purified by prep-HPLC (column : Phenomenex luna C18 100*40mm*5 um; mobile phase: [H20(0.04% HCI)- ACN];gradient: l%-20% B over 8.0 min) to give the title compound (Example 10, 35.2 mg, 66.66 pmol, 26.30% yield, HCI) as a yellow solid. LCMS (ESI+) : m / z 492.3 (M+H) +, Rt: 1.174min.XH NMR (400 MHz, DMSO-d6) 6 = 10.89 - 10.68 (m, 1H), 9.88 (s, 1H), 9.29 - 9.05 (m, 3H), 8.92 - 8.80 (m, 1H), 8.07 - 7.93 (m, 1H), 7.63 (td, j = 7.4, 14.7 Hz, 1H), 7.55 - 7.44 (m, 1H), 4.72 - 4.33 (m, 1H), 4.28 - 3.87 (m, 3H), 3.84 - 3.74 (m, 1H), 3.70 - 3.52 (m, 1H), 3.50 - 3.42 (m, 1H), 3.30 - 3.15 (m, 4H), 2.96 - 2.85 (m, 2H), 2.80 (br d, J = 4.3 Hz, 3H), 2.58 (br d, J = 7.6 Hz, 1H), 2.42 -

[1014] 2.33 (m, 1H), 2.27 - 2.19 (m, 1H), 2.05 - 1.81 (m, 2H), 1.76 - 1.61 (m, 1H).

[1015] The following examples were synthesised according to the method outlined in Synthetic Route 3:

[1016] Synthetic Route 4

[1017] Example 13: 9-Amino-4-(4-methyl-l,4-diazepan-l-yl)-ll-thia-l,3- diazatetracyclo[8.7.0.02,7.012,17]heptadeca-2(7),3,5,9,12,14,16-heptaen-8- one

[1018] 2,6-Dichloropyridine-3-carbonyl chloride: A mixture of 2,6-dichloropyridine-3- carboxylic acid (1.00 g, 5.21 mmol, 1 eq) in SOC (10.00 mL) was stirred at 65 °C for 12 h. TLC showed the reaction was completed. The mixture was concentrated in vacuum to give the title compound (1.00 g, 4.75 mmol, 91.23% yield) as a yellow solid, which was used in the next step without further purification.

[1019] Ethyl 4-chloro-8-oxo-ll-thia-l,3-diazatetracyclo[8.7.0.02,7.012,17]- heptadeca-2(7),3,5,9, 12, 14, 16-heptaene-9-carboxylate: To a mixture of ethyl 2-(l,3-benzothiazol-2-yl)acetate (1.00 g, 4.52 mmol, leq) and MgCH (645.43 mg, 6.78 mmol, 278.20 pL, 1.5 eq) in MeCN (20.00 mL) was added 2,6-dichloropyridine-3- carbonyl chloride (1.00 g, 4.75 mmol, 1.05 eq) and TEA (914.60 mg, 9.04 mmol, 1.26 mL, 2 eq) at -5 °C under N2. The mixture was warmed to 20 °C and stirred for 2 h. Triethylamine (914.60 mg, 9.04 mmol, 1.26 mL, 2 eq) was added to the reaction mixture which was heated to 80 °C and stirred for 10 h. TLC showed the reaction was completed. The mixture was concentrated and the residue was triturated with MeCN (10.00 ml) at 25 °C for 10 min. The mixture was filtered and the solid was collected to give the title compound (1.5 g, 4.18 mmol, 92.51% yield) as an off-white solid. The crude product was used in the next step without further purification.

[1020] Ethyl 4-(4-methyl-l,4-diazepan-l-yl)-8-oxo-ll-thia-l,3-diazatetracyclo- [8.7.0.02,7.012,17]heptadeca-2(7),3,5,9,12,14,16-heptaene-9-carboxylate: A mixture of ethyl 4-chloro-8-oxo-ll-thia-l,3-diazatetracyclo[8.7.0.02,7.012,17]- heptadeca-2(7),3,5,9,12,14,16-heptaene-9-carboxylate (550 mg, 1.53 mmol, 1 eq) and l-methyl-l,4-diazepane (0.350 g, 3.06 mmol, 0.381 mL, 2 eq) in MeCN (10.00 mL) was stirred at 80 °C for 2 h. LCMS showed the reaction was completed. The mixture was concentrated in vacuum. The residue was triturated with MeCN (6.00 mL) for 10 min. The mixture was filtered and the solid was collected to afford the title compound (0.54 g, 1.24 mmol, 80.7% yield) as a yellow solid.1H NMR (400 MHz, CDCI3) 6 = 9.51 (br d, J= 8.4 Hz, 1H), 8.58 (d, J= 9.0 Hz, 1H), 7.73 (d, J= 7.4 Hz, 1H), 7.52 - 7.38 (m, 2H), 6.75 (d, J= 9.1 Hz, 1H), 4.51 (q, J= 7.1 Hz, 2H), 4.07 - 3.76 (m, 4H), 3.32 - 3.24 (m, 4H), 2.45 (s, 3H), 2.07 (quin, J= 5.7 Hz, 2H), 1.50 (t, J= 7.1 Hz, 3H).

[1021] 4-(4-Methyl-l,4-diazepan-l-yl)-8-oxo-ll-thia-l,3-diazatetracyclo- [8.7.0.02,7.012,17]heptadeca-2(7),3,5,9,12,14,16-heptaene-9- carbohydrazide: To a solution of ethyl 4-(4-methyl-l,4-diazepan-l-yl)-8-oxo-ll- thia-l,3-diazatetracyclo[8.7.0.02,7.012,17]heptadeca-2(7),3,5,9,12,14,16-heptaene-9- carboxylate (0.5 g, 1.03 mmol, 1 eq) in MeCN (6 mL) was added hydrazine hydrate (129.01 mg, 2.06 mmol, 125.01 pL, 2 eq) and DBU (235.40 mg, 1.55 mmol, 233.07 pL, 1.5 eq) at 0°C. The reaction was stirred at 0 °C for 20 min. The reaction was heated to 25 °C and stirred for 12 h. The mixture was filtered to give the filter cake. The filter cake was collected and dried to give the crude title compound (400 mg, 804.73 pmol, 78.06% yield, 85% purity). The crude product was used in the next step directly without purification. LCMS (ESI+) : m / z 423.2 (M + H) +, Rt: 0.277 min.

[1022] 4-(4-Methyl-l,4-diazepan-l-yl)-8-oxo-ll-thia-l,3-diazatetracyclo- [8.7.0.02,7.012,17]heptadeca-2(7),3,5,9,12,14,16-heptaene-9-carbonyl azide:

[1023] To a solution of 4-(4-Methyl-l,4-diazepan-l-yl)-8-oxo-ll-thia-l,3-diazatetracyclo- [8.7.0.02,7.012,17]heptadeca-2(7),3,5,9,12,14,16-heptaene-9-carbohydrazide (0.3 g, 1.43 mmol, 1 eq) in HCI (3 mL) and H2O (2 mL) was added a solution of NaNO? (196.94 mg, 2.85 mmol, 2 eq) in H2O (1 mL) dropwise at 0 °C. The mixture was warmed to 25 °C and stirred for 2 h. The mixture was filtered to give the filter cake. The filter cake was collected and dried to give the crude title product (0.2 g, 922.75 pmol, 64.65% yield, 80% purity) as a white solid. LCMS (ESI+) : m / z 434.3 (M + H) +, Rt: 0.341 min.

[1024] 9-Amino-4-(4-methyl-l,4-diazepan-l-yl)-ll-thia-l,3-diazatetracyclo- [8.7.0.02,7.012,17]heptadeca-2(7),3,5,9,12,14,16-heptaen-8-one: A solution of 4-(4-methyl-l,4-diazepan-l-yl)-8-oxo-ll-thia-l,3-diazatetracyclo[8.7.0.02,7.012,17]- heptadeca-2(7),3,5,9,12,14,16-heptaene-9-carbonyl azide (0.2 g, 1.48 mmol, 1 eq) in HCI (8 mL) was heated to 80 °C and stirred for 48 h. The mixture was concentrated in vacuum. The crude product was purified by prep-HPLC to give the title compound (23.3 mg, 60.11 pmol, 4.07% yield, 97.9% purity) as a red solid. LCMS (ESI+) : m / z 380.2 (M+H) +, Rt: 1.329 min.XH NMR (400 MHz, DMSO-d6) 6 = 9.34 (d, J = 8.4 Hz, 1H), 8.33 (d, J = 9.0 Hz, 1H), 7.91 (d, J = 7.8 Hz, 1H), 7.50 (t, J = 7.9 Hz, 1H), 7.40 - 7.32 (m, 1H), 6.94 (d, J = 9.1 Hz, 1H), 4.33 (s, 2H), 3.94 - 3.72 (m, 4H), 2.75 (br s, 2H), 2.52 (br s, 2H), 2.28 (s, 3H), 2.01 (br d, J = 4.8 Hz, 2H).

[1025] Synthetic Route 5

[1026] Example 24: N-(2-(4-methyl-l,4-diazepan-l-yl)-5-oxo-5H-benzo[4',5'] thiazolo[3',2': l,6]pyrido[2,3-d]pyrimidin-6-yl)acrylamide hydrochloride

[1027] To a mixture of 6-amino-2-(4-methyl-l,4-diazepan-l-yl)-5H-benzo[4',5']thiazolo- [3', 2' : l,6]pyrido[2,3-d]pyrimidin-5-one (0.4 g, 959.40 pmol, 1 eq, HCI salt) and DIEA (185.99 mg, 1.44 mmol, 250.66 pL, 3 eq) in DCM (5 mL) was added prop-2-enoyl chloride (173.66 mg, 1.91 mmol, 155.9 pL, 2 eq) at 0°C. The mixture was stirred at 25°C for 2 h. The reaction was quenched by addition of 1.00 mL of H2O and the aqueous phase was extracted with DCM (3 x 5 mL). The combined organic phases were washed with saturated brine (1 mL), dried over anhydrous Na2SC>4 and concentrated in vacuo. The crude product was purified by prep-HPLC (column : Phenomenex luna C18 100*40mm*5 pm; mobile phase: [H20(0.04% HCI)-ACN]; gradient: l%-25% B over 8.0 min) to give the title compound (0.25 g, 575.36 pmol, 59.95% yield) as a yellow solid. LCMS (ESI+) : m / z 435.2 (M + H)+, Rt: 1.340 min.1H NMR (400 MHz, DMSO-d6+D2O) <5 = 9.32 - 8.97 (m, 2H), 7.99 - 7.88 (m, 1H), 7.69 - 7.54 (m, 1H), 7.52 - 7.37 (m, 1H), 6...

Claims

Claims1. A compound of Formula (I):Formula (I) or a pharmaceutically acceptable salt and / or solvate and / or prodrug thereof; wherein :R1and R2are each independently selected from hydrogen or a C1-C12 saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight- chained or branched, or be or include one or more cyclic groups, wherein the hydrocarbyl group may optionally be substituted with one or more halo and / or -NO2 groups, wherein the hydrocarbyl group may optionally include one or more heteroatoms each independently selected from N, O and S in its carbon skeleton, and wherein any -S- moiety in the hydrocarbyl group may optionally be substituted with one or two groups each independently selected from oxo (=0) and =NH to form a -SO-, -SO2-, -S(=NH)- or -SO( = NH)- moiety; or R1and R2together with the nitrogen atom to which they are attached form a 3- to 12-membered cyclic group, wherein the cyclic group may optionally be substituted with one or more substituents each independently selected from a halo, oxo (=0), -OH, -SH, -NH2, -SO2H, -SO3H, -SO2NH2, -NO2, or a C1-C6 saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight- chained or branched, or be or include a cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more halo and / or -NO2 groups, wherein the hydrocarbyl group may optionally include one or more heteroatoms each independently selected from N, O and S in its carbon skeleton, and wherein any -S- moiety in the hydrocarbyl group may optionally be substituted with one or two groups each independently selected from oxo (=0) and =NH to form a -SO-, -SO2-, -S(=NH)- or -SO( = NH)- moiety;R3and R4are each independently selected from hydrogen or a C1-C12 saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight- chained or branched, or be or include one or more cyclic groups, wherein thehydrocarbyl group may optionally be substituted with one or more halo and / or -NO2 groups, wherein the hydrocarbyl group may optionally include one or more heteroatoms each independently selected from N, O and S in its carbon skeleton, and wherein any -S- moiety in the hydrocarbyl group may optionally be substituted with one or two groups each independently selected from oxo (=0) and =NH to form a -SO-, -SO2-, -S(=NH)- or -SO( = NH)- moiety; or R3and R4together with the nitrogen atom to which they are attached form a 3- to 12-membered cyclic group, wherein the cyclic group may optionally be substituted with one or more substituents each independently selected from a halo, oxo (=0), -OH, -SH, -NH2, -SO2H, -SO3H, -SO2NH2, -NO2, or a C1-C6 saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight- chained or branched, or be or include a cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more halo and / or -NO2 groups, wherein the hydrocarbyl group may optionally include one or more heteroatoms each independently selected from N, O and S in its carbon skeleton, and wherein any -S- moiety in the hydrocarbyl group may optionally be substituted with one or two groups each independently selected from oxo (=0) and =NH to form a -SO-, -SO2-, -S(=NH)- or -SO( = NH)- moiety; or R3and R4together with the nitrogen atom to which they are attached form a -NO2 group;X1is N, C-H, C-Hal or C-RX1;X2is N, C-H, C-Hal or C-RX2;X3is N, C-H, C-Hal or C-RX3; andX4is N or C; provided that no more than three of X1, X2, X3and X4are N;RX1, RX2and RX3are each independently selected from -OH, -SH, -NH2, -SO2H, -SO3H, -SO2NH2, -NO2, or a C1-C4 saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more halo and / or -NO2 groups, wherein the hydrocarbyl group may optionally include one or more heteroatoms each independently selected from N, O and S in its carbon skeleton, and wherein any -S- moiety in the hydrocarbyl group may optionally be substituted with one or two groups each independently selected from oxo (=0) and = NH to form a -SO-, -SO2-, -S(=NH)- or -SO( = NH)- moiety;Q1is O, S, N, N-H, N-RQ1, C-H, C-Hal, or C-R«2;RQ1is selected from a C1-C4 saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the hydrocarbyl group may optionally be substituted with oneor more halo and / or -NO2 groups, wherein the hydrocarbyl group may optionally include one or more heteroatoms each independently selected from N, O and S in its carbon skeleton, and wherein any -S- moiety in the hydrocarbyl group may optionally be substituted with one or two groups each independently selected from oxo (=0) and = NH to form a -SO-, -SO2-, -S(=NH)- or -SO( = NH)- moiety, provided that the atom of RQ1that is directly attached to the nitrogen atom of N-RQ1is a carbon atom;RQ2isselected from -OH, -SH, -NH2, -SO2H, -SO3H, -SO2NH2, -NO2, or a C1-C4 saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more halo and / or -NO2 groups, wherein the hydrocarbyl group may optionally include one or more heteroatoms each independently selected from N, O and S in its carbon skeleton, and wherein any -S- moiety in the hydrocarbyl group may optionally be substituted with one or two groups each independently selected from oxo (=0) and =NH to form a -SO-, -SO2-, -S(=NH)- or -SO( = NH)- moiety;A1is N, C-H, C-Hal or C-RA1;A2is N, C-H, C-Hal or C-RA2;A3is N, C-H, C-Hal or C-RA3;A4is N, C-H, C-Hal or C-RA4; andA5is N or C; provided that no more than three of A1, A2, A3, A4and A5are N;RA1, RA2, RA3and RA4are each independently selected from -OH, -SH, -NH2, -SO2H, -SO3H, -SO2NH2, -NO2, or a C1-C4 saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more halo and / or -NO2 groups, wherein the hydrocarbyl group may optionally include one or more heteroatoms each independently selected from N, O and S in its carbon skeleton, and wherein any -S- moiety in the hydrocarbyl group may optionally be substituted with one or two groups each independently selected from oxo (=0) and = NH to form a -SO-, -SO2-, -S(=NH)- or -SO( = NH)- moiety;A6is N or C; and each Hal is independently selected from a fluoro, chloro, bromo or iodo group.

2. A compound as claimed in claim 1, or a pharmaceutically acceptable salt and / or solvate and / or prodrug thereof, wherein R3is selected from hydrogen or a C1-C12 saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include one or two cyclic groups, wherein the hydrocarbyl group may optionally be substituted with one or more halo and / or -NO2groups, and wherein the hydrocarbyl group may optionally include one, two, three or four heteroatoms each independently selected from N and O in its carbon skeleton, and R4may be selected from hydrogen or a C1-C4 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the saturated hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton.

3. A compound as claimed in claim 1 or claim 2, or a pharmaceutically acceptable salt and / or solvate and / or prodrug thereof, wherein :R3is selected from hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C2-C4 alkenyl, C2-C4 fluoroalkenyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R300group;R300is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, C2-C3 alkenyl, C2-C3 fluoroalkenyl, cyclopropyl or fluorocyclopropyl group;R4is selected from hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C2-C4 alkenyl, C2-C4 fluoroalkenyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R400group; andR400is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, C2-C3 alkenyl, C2-C3 fluoroalkenyl, cyclopropyl or fluorocyclopropyl group; orR3and R4together with the nitrogen atom to which they are attached form an azetidinyl, pyrrolidinyl, piperidinyl or azepanyl group.

4. A compound as claimed in claim 3, or a pharmaceutically acceptable salt and / or solvate and / or prodrug thereof, wherein R3and R4are both hydrogen.

5. A compound as claimed in claim 1 or claim 2, or a pharmaceutically acceptable salt and / or solvate and / or prodrug thereof, wherein :R3has the formula -L3-Q3-R31, provided that the group -L3-Q3-R31contains no more than 12 carbon atoms;Q3is O, S or NR32;L3is a straight-chained alkylene group, wherein the straight-chained alkylene group optionally includes a single heteroatom independently selected from O and N in its carbon skeleton, wherein L3has a chain length of from 2 to 6 atoms, and wherein L3may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL3;R31is hydrogen or a C1-C6 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups, and wherein the saturated hydrocarbyl group may optionally include one or two heteroatoms each independently selected from N and O in its carbon skeleton;R32is hydrogen or a C1-C6 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups, and wherein the saturated hydrocarbyl group may optionally include one or two heteroatoms each independently selected from N, O and S in its carbon skeleton, wherein any -S- moiety in the saturated hydrocarbyl group may optionally be substituted with one or two groups each independently selected from oxo (=0) and =NH to form a -SO-, -SO2-, -S( = NH)- or -SO( = NH)- moiety; each RL3is independently selected from a methyl or fluoromethyl group; or any two RL3may, together with the atom or atoms to which they are attached, form a 3- to 7-membered saturated monocyclic group, wherein the 3- to 7- membered saturated monocyclic group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL4; or any RL3and R31may, together with the atoms to which they are attached, form a 3- to 7-membered saturated monocyclic heterocyclic group, wherein the 3- to 7-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL4; or R31and R32may, together with the nitrogen atom to which they are attached form a 3- to 7-membered saturated monocyclic heterocyclic group, wherein the 3- to 7-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL4; or any two RL3and R31may, together with the atoms to which they are attached, form a 7- to 10-membered saturated bicyclic heterocyclic group, wherein the 7- to 10-membered saturated bicyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL4; or any RL3, R31and R32may, together with the atoms to which they are attached, form a 7- to 10-membered saturated bicyclic heterocyclic group, whereinthe 7- to 10-membered saturated bicyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL4; and each RL4is independently selected from a methyl or a fluoromethyl group.

6. A compound as claimed in claim 1 or claim 2, or a pharmaceutically acceptable salt and / or solvate and / or prodrug thereof, wherein :R3has the formula -L3-NR31R32, provided that the group -L3-NR31R32contains no more than 10 carbon atoms;L3is a straight-chained alkylene group, wherein the straight-chained alkylene group optionally includes a single nitrogen atom in its carbon skeleton, wherein the atom of L3that is directly attached to the nitrogen atom of -NR4- is a carbon atom, wherein the atom of L3that is directly attached to the nitrogen atom of -NR31R32is a carbon atom, wherein L3has a chain length of from 2 to 5 atoms, and wherein L3may optionally be substituted with one or more fluoro groups and / or one or two groups RL3;R31is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups;R32is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups; and each RL3is independently selected from a methyl or fluoromethyl group; or any two RL3may, together with the atom or atoms to which they are attached, form a 3- to 6-membered saturated monocyclic group, wherein the 3- to 6- membered saturated monocyclic group may optionally be substituted with one or more fluoro groups and / or one or two groups RL4; or any RL3and R31may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one or two groups RL4; or R31and R32may, together with the nitrogen atom to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or one or two groups RL4; each RL4is independently selected from a methyl or a fluoromethyl group;R4is selected from hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R400group; andR400is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group.

7. A compound as claimed in claim 1 or claim 2, or a pharmaceutically acceptable salt and / or solvate and / or prodrug thereof, wherein :R3has the formula -CO-L31-NR31R32, provided that the group -CO-L31-NR31R32contains no more than 10 carbon atoms;L31is a straight-chained alkylene group, wherein the straight-chained alkylene group optionally includes a single nitrogen atom in its carbon skeleton, wherein the atom of L31that is directly attached to the carbon atom of the carbonyl group of -CO-L31-NR31R32is a carbon atom, wherein the atom of L31that is directly attached to the nitrogen atom of -NR31R32is a carbon atom, wherein L31has a chain length of from 2 to 5 atoms, and wherein L31may optionally be substituted with one or more fluoro groups and / or one or two groups RL3;R31is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group;R32is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group; and each RL3is independently selected from a methyl or fluoromethyl group; or any two RL3may, together with the atom or atoms to which they are attached, form a 3- to 6-membered saturated monocyclic group, wherein the 3- to 6- membered saturated monocyclic group may optionally be substituted with one or more fluoro groups and / or a single oxo ( = 0) group and / or one or two groups RL4; or any RL3and R31may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group and / or one or two groups RL4; or R31and R32may, together with the nitrogen atom to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally besubstituted with one or more fluoro groups and / or a single oxo (=0) group and / or one or two groups RL4; each RL4is independently selected from a methyl or a fluoromethyl group;R4is selected from hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R400group; andR400is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group.

8. A compound as claimed in claim 1 or claim 2, or a pharmaceutically acceptable salt and / or solvate and / or prodrug thereof, wherein :R3has the formula -CO-NR41-L32-NR31R32, provided that the group -CO-NR41-L32-NR31R32contains no more than 10 carbon atoms;L32is a C2-C4 straight-chained alkylene group, wherein the alkylene group may optionally be substituted with one or more fluoro groups and / or one or two groups RL3;R31is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group;R32is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group;R41is hydrogen or a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group; and each RL3is independently selected from a methyl or fluoromethyl group; or any RL3and R31may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group and / or one or two groups RL4; or any RL3and R41may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substitutedwith one or more fluoro groups and / or a single oxo (=0) group and / or one or two groups RL4; or any R31and R41may, together with the atoms to which they are attached, form a piperazinyl group, wherein the piperazinyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group and / or one or two groups RL4; or R31and R32may, together with the nitrogen atom to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group and / or one or two groups RL4; each RL4is independently selected from a methyl or a fluoromethyl group;R4is selected from hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R400group; andR400is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group.

9. A compound as claimed in claim 1 or claim 2, or a pharmaceutically acceptable salt and / or solvate and / or prodrug thereof, wherein :R3has the formula -CO-L36-OR35, provided that the group -CO-L36-OR35contains no more than 10 carbon atoms;L36is a straight-chained alkylene group, wherein the straight-chained alkylene group optionally includes a single nitrogen atom in its carbon skeleton, wherein the atom of L36that is directly attached to the carbon atom of the carbonyl group of -CO-L36-OR35is a carbon atom, wherein the atom of L36that is directly attached to the oxygen atom of -OR35is a carbon atom, wherein L36has a chain length of from 2 to 5 atoms, and wherein L36may optionally be substituted with one or more fluoro groups and / or one or two groups RL3;R35is a C1-C4 alkyl group, wherein the alkyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the alkyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group; and each RL3is independently selected from a methyl or fluoromethyl group; or any two RL3may, together with the atom or atoms to which they are attached, form a 3- to 6-membered saturated monocyclic group, wherein the 3- to 6- membered saturated monocyclic group may optionally be substituted with one or more fluoro groups and / or a single oxo ( = 0) group and / or one or two groups RL4;or any RL3and R35may, together with the atoms to which they are attached, form a 5- or 6-membered saturated monocyclic heterocyclic group, wherein the 5- or 6-membered saturated monocyclic heterocyclic group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group and / or one or two groups RL4; each RL4is independently selected from a methyl or a fluoromethyl group; and R4is selected from hydrogen or a C1-C4 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the saturated hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton.

10. A compound as claimed in claim 1 or claim 2, or a pharmaceutically acceptable salt and / or solvate and / or prodrug thereof, wherein :R3has the formula -L30-R30, provided that the group -|_30-R30contains no more than 12 carbon atoms;L30is a bond or a C1-C4 straight-chained alkylene group, wherein the alkylene group may optionally be substituted with one or more fluoro groups and / or one or two oxo (=0) groups and / or one, two, three or four groups RL30; each RL30is independently selected from a methyl or a fluoromethyl group;R30is a phenyl or a 5- or 6-membered heteroaryl group, wherein the phenyl or the 5- or 6-membered heteroaryl group may optionally be substituted with one or more groups each independently selected from a fluoro, chloro, bromo, -OH, -NH2, -R301, -OR301, -NHR301or -N(R301)2 group, wherein each R301group is independently selected from a Ci-Cs saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more halo and / or -NO2 groups, and wherein the hydrocarbyl group may optionally include one, two, three or four heteroatoms each independently selected from N and O in its carbon skeleton, or wherein any two R301groups attached to the same nitrogen atom may together with the nitrogen atom to which they are attached form a 3- to 7- membered monocyclic heterocyclic group, wherein the monocyclic heterocyclic group may optionally be substituted with one or more substituents each independently selected from a halo, oxo ( = 0), -OH, -NH2, -NO2 or a C1-C4 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0)group, and wherein the saturated hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton;R4is selected from hydrogen or a C1-C4 alkyl, C1-C4 fluoroalkyl, C3-C4 cycloalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R400group; andR400is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group.

11. A compound as claimed in claim 1, or a pharmaceutically acceptable salt and / or solvate and / or prodrug thereof, wherein R3and R4together with the nitrogen atom to which they are attached form a -NO2 group.

12. A compound as claimed in any one of claims 1 to 11, or a pharmaceutically acceptable salt and / or solvate and / or prodrug thereof, wherein R1is a C2-C8 saturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a single cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more fluoro groups, wherein the hydrocarbyl group includes one or two heteroatoms each independently selected from N and O in its carbon skeleton, and R2is selected from hydrogen or a C1-C3 alkyl or C1-C3 fluoroalkyl group.

13. A compound as claimed in any one of claims 1 to 11, or a pharmaceutically acceptable salt and / or solvate and / or prodrug thereof, wherein R1and R2together with the nitrogen atom to which they are attached form a 4- to 7-membered monocyclic group or a 6- to 12-membered bicyclic group, wherein the monocyclic or the bicyclic group may optionally be substituted with one or more substituents each independently selected from a halo, oxo (=0), -OH, -NH2 or a C1-C6 saturated or unsaturated hydrocarbyl group, wherein the hydrocarbyl group may be straight- chained or branched, or be or include a cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more halo groups, and wherein the hydrocarbyl group may optionally include one or two heteroatoms each independently selected from N and O in its carbon skeleton.

14. A compound as claimed in claim 13, or a pharmaceutically acceptable salt and / or solvate and / or prodrug thereof, wherein -NRXR2has the formula:wherein : n is 1 or 2; m is 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10; each R11is independently selected from a fluoro, methyl or fluoromethyl group, provided that no more than four R11are selected from a methyl or fluoromethyl group;X12is O or NR12; andR12is hydrogen or a C1-C4 saturated hydrocarbyl group, wherein the saturated hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the saturated hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the saturated hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton.

15. A compound as claimed in claim 13, or a pharmaceutically acceptable salt and / or solvate and / or prodrug thereof, wherein -NR / R2has the formula: wherein :j is 0, 1, 2 or 3; k is 0, 1, 2 or 3; p is 0, 1, 2 or 3; and q is 0, 1, 2 or 3; provided that: j + k = 2 or 3; p + q = 2 or 3; when j = 0, q is 1, 2 or 3; when k = 0, p is 1, 2 or 3; when p = 0, k is 1, 2 or 3; and when q = 0, j is 1, 2 or 3; and wherein :r is 0, 1 or 2; s is 0, 1 or 2;R15is hydrogen or a C1-C4 alkyl, C3-C4 cycloalkyl, C1-C4 fluoroalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R150group;R150is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group; and each R16is independently selected from a methyl or fluoromethyl group.

16. A compound as claimed in claim 13, or a pharmaceutically acceptable salt and / or solvate and / or prodrug thereof, wherein -NRXR2has the formula :wherein :X15is O or NR15; j is 0, 1, 2, 3 or 4; k is 0, 1, 2, 3 or 4; p is 0, 1, 2, 3 or 4; and q is 0, 1, 2, 3 or 4; provided that: j + k = 3 or 4; p + q = 3 or 4; when j = 0, q is 1, 2, 3 or 4 and p is 1, 2, 3 or 4; when k = 0, q is 1, 2, 3 or 4 and p is 1, 2, 3 or 4; when p = 0, k is 1, 2, 3 or 4 and j is 1, 2, 3 or 4; and when q = 0, k is 1, 2, 3 or 4 and j is 1, 2, 3 or 4; and wherein : r is 0, 1 or 2; s is 0, 1 or 2;R15is hydrogen or a C1-C4 alkyl, C3-C4 cycloalkyl, C1-C4 fluoroalkyl, C3-C4 fluorocycloalkyl, cyclopropylmethyl, fluorocyclopropylmethyl or -CO-R150group;R150is selected from a C1-C3 alkyl, C1-C3 fluoroalkyl, cyclopropyl or fluorocyclopropyl group; and each R16is independently selected from a methyl or fluoromethyl group.

17. A compound as claimed in any one of claims 1 to 16, or a pharmaceutically acceptable salt and / or solvate and / or prodrug thereof, wherein :X1is N, C-H, C-Hal or C-RX1;X2is N, C-H, C-Hal or C-RX2;X3is N, C-H, C-Hal or C-RX3; andX4is C; provided that at least one of X1, X2and X3is N, and that no more than two of X1, X2, and X3are N; andRX1, RX2and RX3are each independently selected from a C1-C4 saturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton .

18. A compound as claimed in any one of claims 1 to 17, or a pharmaceutically acceptable salt and / or solvate and / or prodrug thereof, wherein X2is N.

19. A compound as claimed in any one of claims 1 to 18, or a pharmaceutically acceptable salt and / or solvate and / or prodrug thereof, wherein Q1is S, N-H or N-RQ1, wherein RQ1is a methyl or fluoromethyl group.

20. A compound as claimed in any one of claims 1 to 19, or a pharmaceutically acceptable salt and / or solvate and / or prodrug thereof, wherein :A1is N, C-H, C-Hal or C-RA1;A2is N, C-H, C-Hal or C-RA2;A3is N, C-H, C-Hal or C-RA3;A4is N, C-H, C-Hal or C-RA4;A5is C; andRA1, RA2, RA3and RA4are each independently selected from a C1-C4 saturated hydrocarbyl group, wherein the hydrocarbyl group may be straight-chained or branched, or be or include a cyclic group, wherein the hydrocarbyl group may optionally be substituted with one or more fluoro groups and / or a single oxo (=0) group, and wherein the hydrocarbyl group may optionally include a single heteroatom selected from N and O in its carbon skeleton; provided that no more than one of A1, A2, A3and A4is N; and provided that no more than two of A1, A2, A3and A4are C-RA1, C-RA2, C-RA3orC-RA4.

21. A compound as claimed in any one of claims 1 to 20, or a pharmaceutically acceptable salt and / or solvate and / or prodrug thereof, wherein A6is N.

22. A compound as claimed in any one of claims 1 to 21, or a pharmaceutically acceptable salt and / or solvate and / or prodrug thereof, wherein each Hal is independently selected from a fluoro, chloro or bromo group23. A compound as claimed in any one of claims 1 to 22, or a pharmaceutically acceptable salt and / or solvate and / or prodrug thereof, wherein the compound is a compound of Formula (XI) :Formula (XI) wherein R1, R2, R3, R4, X1, X2and Q1are as defined in accordance with any preceding claim.

24. A compound selected from the group consisting of:- ST3 -or a pharmaceutically acceptable salt and / or solvate and / or prodrug of the selected compound.

25. An antibody-drug conjugate comprising a compound, or a pharmaceutically acceptable salt and / or solvate and / or prodrug thereof, as claimed in any one of claims 1 to 24.

26. A pharmaceutical composition comprising a compound, or a pharmaceutically acceptable salt and / or solvate and / or prodrug thereof, as claimed in any one of claims 1 to 24, or an antibody-drug conjugate as claimed in claim 25, and a pharmaceutically acceptable excipient.

27. A compound, or a pharmaceutically acceptable salt and / or solvate and / or prodrug thereof, as claimed in any one of claims 1 to 24, or an antibody-drug conjugate as claimed in claim 25, or a pharmaceutical composition as claimed in claim 26, for use in medicine.

28. A compound, or a pharmaceutically acceptable salt and / or solvate and / or prodrug thereof, as claimed in any one of claims 1 to 24, or an antibody-drug conjugate as claimed in claim 25, or a pharmaceutical composition as claimed in claim 26, for use in treating cancer.

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