Pharmaceutical compounds for the treatment of complement mediated disorders

Abstract

This disclosure provides compounds, compositions, and methods to treat medical disorders, such as complement-mediated disorders, including complement C1s-mediated disorders.

Description

[0001] PHARMACEUTICAL COMPOUNDS FOR THE TREATMENT OF COMPLEMENT MEDIATED DISORDERS Field of the Disclosure Herein are provided pharmaceutical compounds to treat medical disorders, such as complement- mediated disorders, including complement C1-mediated disorders. Background of the Disclosure The complement system is a part of the innate immune system which does not adapt to changes over the course of the subject’s life but is recruited and used by the adaptive immune system. For example, it assists, or complements, the ability of antibodies and phagocytic cells to clear pathogens. This sophisticated regulatory pathway allows rapid reaction to pathogenic organisms while protecting host cells from destruction. Over thirty proteins and protein fragments make up the complement system. These proteins act through opsonization (enhancing phagocytosis of antigens), chemotaxis (attracting macrophages and neutrophils), cell lysis (rupturing membranes of foreign cells), and agglutination (clustering and binding of pathogens together). The complement system has three pathways: classical, alternative, and lectin. The classical pathway is triggered by antibody-antigen complexes with the antibody isotypes IgG and IgM. The antibody-antigen complex binds to C1 and this initiates the cleavage of C4 and C2 to generate C3 convertase that then splits C3 into C3a and C3b. C3a interacts with its C3a receptor to recruit leukocytes, while C3b binds to C3 convertase to form C5 convertase. C5 convertase cleaves C5 into C5a and C5b. Similar to C3a, C5a interacts with its C5a receptor to recruit leukocytes, but C5b interacts with C6, C7, C8, and C8 and together these proteins form the cylindrical membrane attack complex (MAC) that causes the cell to swell and burst. These immune responses can be inhibited by preventing C1 from being able to bind the antibody-antigen complex. Given the range of serious diseases mediated by a disfunction of the complement system, there is a clear medical need to provide pharmaceutically acceptable compounds, methods, compositions, and methods of manufacture to inhibit the complement system in a patient in need thereof. Therefore, the present disclosure provides compounds and their uses and compositions to treat disorders arising from or amplified by a disfunction of the complement system. The present disclosure also provides compounds, uses, compositions, combinations, and processes of manufacture that inhibit C1s (complement C1 esterase) and thus can treat disorders mediated by C1s. Summary The present disclosure provides compounds, compositions, and methods for treating a disorder mediated by the complement cascade (including a dysfunctional cascade), a disorder or abnormality of a cell that adversely affects the ability of the cell to engage in or respond to normal complement activity including for example, the classical complement pathway, or an undesired complement-mediated response to a medical treatment, such as surgery or other medical procedure or a pharmaceutical or biopharmaceutical drug administration, a blood transfusion, or other allogenic tissue or fluid administration. In some embodiments, the active compound may act as an inhibitor of the complement classical pathway by inhibiting complement C1s. Without wishing to be bound by theory, the present disclosure is based, in part, on the unexpected discovery that compounds of the disclosure exhibit advantageous properties over other C1s inhibitors (e.g., the compounds described in WO2020 / 198062, WO2022 / 066774, WO2023 / 183405, WO2024 / 035686, and WO2024 / 044098), such as improved C1s inhibiting activity, improved classical pathway hemolysis inhibiting activity, improved Caco-2 permeability, improved oral bioavailability, improved C1s selectivity (e.g., over other proteases, such as trypsin, thrombin, tryptase, and / or MASP-2), improved physiochemical properties, improved metabolic stability, reduced cytotoxicity, and / or reduced cardiotoxicity as determined by the assays described in, e.g., Examples 3-12 In one aspect, the present disclosure provides a compound of Formula (I): or a pharmaceutically acceptable salt thereof, in which all variables are as defined herein. In another aspect, the present disclosure provides a pharmaceutical composition including a compound disclosed herein (e.g., any one of the compounds of Formulas (I), (I’), (I”), (II), (III), (IV), (V), (VI), and (VII), and Table 1) or a pharmaceutically acceptable salt thereof and a pharmaceutically acceptable excipient. In another aspect, the present disclosure provides a method of treating a complement C1 esterase (C1s) mediated disorder. The method includes administering to a subject in need thereof a therapeutically effective amount of a compound disclosed herein (e.g., any one of the compounds of Formulas (I), (I’), (I”), (II), (III), (IV), (V), (VI), and (VII), and Table 1) or a pharmaceutically acceptable salt thereof. In another aspect, the present disclosure provides a method of inhibiting C1s activity in a subject. The method includes administering to the subject in need thereof a therapeutically effective amount of a compound disclosed herein (e.g., any one of the compounds of Formulas (I), (I’), (I”), (II), (III), (IV), (V), (VI), and (VII), and Table 1) or a pharmaceutically acceptable salt thereof. In another aspect, the present disclosure provides a compound disclosed herein (e.g., any one of the compounds of Formulas (I), (I’), (I”), (II), (III), (IV), (V), (VI), and (VII), and Table 1) or a pharmaceutically acceptable salt thereof, for use in the treatment of a C1s mediated disorder. In another aspect, the present disclosure provides a use of a compound disclosed herein (e.g., any one of the compounds of Formulas (I), (I’), (I”), (II), (III), (IV), (V), (VI), and (VII), and Table 1) or a pharmaceutically acceptable salt thereof in the preparation a medicament for use in the treatment of a C1s mediated disorder. Definitions Compounds are described using standard nomenclature. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as is commonly understood by one of skill in the art to which the present disclosure belongs. The terms “a” and “an” do not denote a limitation of quantity, but rather denote the presence of at least one of the referenced items. The term “or” means “and / or.” Recitation of ranges of values are merely intended to serve as a shorthand method of referring individually to each separate value falling within the range, unless otherwise indicated herein, and each separate value is incorporated into the specification as if it were individually recited herein. The endpoints of all ranges are included within the range and independently combinable. All methods described herein can be performed in a suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of examples, or exemplary language (e.g., “such as”), is intended merely as illustration, and does not pose a limitation on the scope of the invention. The term “absent,” as used herein in reference to a structural variable, refers to the lack of a substituent due to the valency of the atom to which the structural variable is attached. For example, for an =C(R2)- group, one of the R2 is a substituent (e.g., H), while the other is absent due to the valency of the carbon atom. The term “alkoxy,” as used herein, refers to a -OR radical, in which R is alkyl, as defined herein. The term “alkoxyalkyl,” as used herein, refers to a -ROR’ radical, in which R is alkylene and R’ is alkyl, as defined herein. The term “alkyl,” as used herein, refers to a branched or straight-chain monovalent saturated aliphatic radical containing only C and H when unsubstituted. The monovalency of an alkyl group does not include the optional substituents on the alkyl group. For example, if an alkyl group is attached to a compound, monovalency of the alkyl group refers to its attachment to the compound and does not include any additional substituents that may be present on the alkyl group. In some embodiments, the alkyl group may contain, e.g., 1-8, 1-6, 1-4, or 1-2 carbon atoms (e.g., C1-C8, C1-C6, C1-C4, or C1-C2). Examples include, but are not limited to, methyl, ethyl, isobutyl, sec-butyl, tert-butyl, 2-methylpropyl, and 2,2- dimethylpropyl. The term “alkylene,” as used herein, refers to a divalent radical obtained by removing a hydrogen atom from a carbon atom of an alkyl group. The divalency of an alkylene group does not include the optional substituents on the alkylene group. Examples of alkylene groups include, but are not limited to, methylene, ethylene, and n-propylene. The term “amino,” as used herein, refers to a monovalent radical of formula -NH2. An “optionally substituted amino,” as used herein, refers to an amino group in which one or both hydrogen atoms are independently replaced with a substituent as defined herein. The term “aryl,” as used herein, refers to any monocyclic or fused ring bicyclic or multicyclic system containing only carbon atoms in the ring(s), which has the characteristics of aromaticity in terms of electron distribution throughout the entire ring system, e.g., phenyl, naphthyl, or phenanthryl. An aryl group may have, e.g., 6-16, 6-14, or 6-10 carbon ring atoms (e.g., C6-C16, C6-C14, C6-C10, C6, C10, C14, or C16). The term “arylalkyl,” as used herein, refers to a -RR’ radical, in which R’ is aryl, as defined herein, and R is alkylene, as defined herein. The term “aryloxy,” as used herein, refers to an -OR radical, in which R is aryl, as defined herein. The term “carbocyclyl,” as used herein, refers to a monovalent, saturated (i.e., cycloalkyl) or unsaturated, non-aromatic group (e.g., cycloalkenyl, which contains at least one carbon-carbon double bond and no carbon-carbon triple bonds) containing only C and H when unsubstituted, which may be monocyclic, bicyclic, or multicyclic (e.g., tricyclic). A carbocyclyl may have, e.g., 3-14 carbons (e.g., a C3- C4, C3-C5, C3-C6, C3-C7, C3-C8, or C3-C14 carbocyclyl). Examples of carbocyclyls include, but are not limited to, cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclohexenyl, cycloheptenyl, and fluorenyl. The term “carbocyclyl” also includes cyclic groups having a bridged multicyclic structure in which one or more carbons bridges two non-adjacent members of a monocyclic ring, e.g., bicyclo[2.2.1]heptyl. The term “cycloalkylalkyl,” as used herein, refers to an -RR’ radical, in which R’ is cycloalkyl, as defined herein, and R is alkylene, as defined herein. The term “cycloalkyloxy,” as used herein, refers to an -OR radical, in which R is cycloalkyl, as defined herein. The term “halo,” as used herein, refers to a fluorine (fluoro; F), chlorine (chloro; Cl), bromine (bromo; Br), or iodine (iodo; I) radical. The term “haloalkyl,” as used herein, refers to an alkyl group, as defined herein, in which one or more H is replaced with halo, as defined herein. Examples of haloalkyl include, but are not limited to, CF3, CHF2, and CH2F. The term “haloalkoxy,” as used herein, refers to an -OR radical, in which R is haloalkyl, as defined herein. The term “heteroaryl,” as used herein, refers to a monocyclic, bicyclic, or multicyclic aromatic group containing 1, 2, 3, or 4 heteroatoms selected from N, O, S, B, and P (e.g., 1-4, 1-3, or 1 or 2 heteroatoms selected from N, O, and S) as ring atoms, with the remaining ring atoms being carbon. In some embodiments, a heteroaryl group is a bicyclic or tricyclic system containing at least one 5, 6, or 7 membered aromatic ring which contains from 1, 2, 3, or 4 heteroatoms selected from N, O, S, B, and P (e.g., 1-4, 1-3, or 1 or 2 heteroatoms selected from N, O, and S) as ring atoms, with the remaining ring atoms being carbon. In some embodiments, a heteroaryl group is a monocyclic aromatic ring having 5 or 6 ring atoms (i.e., 5- or 6-membered heteroaryl). In some embodiments, is a bicyclic aromatic ring system having 8 to 10 ring atoms (i.e., 8- to 10-membered bicyclic heteroaryl). Examples of heteroaryl groups include, but are not limited to, pyridinyl, imidazolyl, imidazopyridinyl, pyrimidinyl, pyrazolyl, triazolyl, pyrazinyl, furyl, thienyl, isoxazolyl, thiazolyl, oxadiazolyl, oxazolyl, isothiazolyl, pyrrolyl, quinolinyl, isoquinolinyl, tetrahydroisoquinolinyl, indolyl, benzimidazolyl, benzofuranyl, cinnolinyl, indazolyl, indolizinyl, phthalazinyl, pyridazinyl, triazinyl, isoindolyl, pteridinyl, purinyl, oxadiazolyl, triazolyl, thiadiazolyl, thiadiazolyl, furazanyl, benzofurazanyl, benzothiophenyl, benzothiazolyl, benzoxazolyl, quinazolinyl, quinoxalinyl, naphthyridinyl, tetrahydrofuranyl, and furopyridinyl. The term “heterocyclyl,” as used herein, refers to saturated or unsaturated, non-aromatic, monocyclic, bicyclic, or multicyclic group containing 1, 2, 3, or 4 heteroatoms selected from N, O, S, B, and P (e.g., 1-4, 1-3, or 1 or 2 heteroatoms selected from N, O, and S) as ring atoms, with the remaining ring atoms being carbon. The term “heterocyclyl” includes, e.g., monocyclic 3-to 12-membered rings, bicyclic 5- to 16-membered ring systems, multicyclic (e.g., tricyclic) 10- to 18-membered ring systems, which may include bridged ring systems when bicyclic or multicyclic. In some embodiments, a heterocyclyl group contains 3-16 ring atoms (i.e., 3- to 16-membered heterocyclyl), e.g., 3-12 ring atoms (i.e., 3- to 12-membered heterocyclyl) or 4-10 ring atoms (i.e., 4-to 10-membered heterocyclyl). Examples of saturated heterocyclyl groups include saturated 4- to 7-membered monocyclic groups containing 1 to 4 nitrogen atoms (e.g., pyrrolidinyl, imidazolidinyl, piperidinyl, pyrrolinyl, azetidinyl, piperazinyl, and pyrazolidinyl); saturated 4 to 6-membered monocyclic groups containing 1 to 2 oxygen atoms and 1 to 3 nitrogen atoms (e.g., morpholinyl); saturated 3 to 6-membered monocyclic groups containing 1 to 2 sulfur atoms and 1 to 3 nitrogen atoms (e.g., thiazolidinyl). Examples of unsaturated, non-aromatic heterocyclyl radicals include, but are not limited to, dihydrothienyl, dihydropyranyl, dihydrofuryl, and dihydrothiazolyl. Other examples of heterocyclyl radicals include, but are not limited to, pyrrolidinyl, imidazolidinyl, piperidinyl, pyrrolinyl, pyrazolidinyl, piperazinyl, morpholinyl, tetrahydropyranyl, thiazolidinyl, dihydrothienyl, 2,3-dihydro-benzo[l,4]dioxanyl, indolinyl, isoindolinyl, dihydrobenzothienyl, dihydrobenzofuryl, isochromanyl, chromanyl, 1,2-dihydroquinolyl, 1,2,3,4- tetrahydro-isoquinolyl, 1,2,3,4- tetrahydro-quinolyl, 2,3,4,4a,9,9a-hexahydro-1H-3-aza-fluorenyl, 5,6,7-trihydro-l,2,4-triazolo[3,4- a]isoquinolyl, 3,4-dihydro-2H-benzo[1,4]oxazinyl, benzo[1,4]dioxanyl, 2,3-dihydro-1H-1λ- benzo[d]isothiazol-6-yl, dihydropyranyl, dihydrofuryl and dihydrothiazolyl. “Bicyclic heterocyclyl” includes groups in which a saturated or unsaturated, non-aromatic ring containing 1, 2, 3, or 4 heteroatoms as ring atoms is fused with an aryl group (e.g., phenyl) or a cycloalkyl group. “Bicyclic heterocyclyl” also includes groups in which a heteroaryl group, as defined herein, is fused to a saturated or unsaturated, non- aromatic ring containing 0, 1, 2, 3, or 4 heteroatoms as ring atoms. The term “heterocyclyloxy,” as used herein, refers to a monovalent radical of formula -OR, in which R is heterocyclyl, as defined herein. The term “hydroxyalkyl,” as used herein, refers to a monovalent radical of formula -ROH, in which R is alkylene, as defined herein. The term “oxo,” as used herein, refers to a =O radial. The term “substituted”, as used herein, means that any one or more hydrogens on the designated atom or group is replaced with a moiety as defined herein or selected from an indicated group of moieties, provided that the designated atom's normal valence is not exceeded, and the resulting compound is stable. For example, when the substituent is oxo (i.e., =O), then two hydrogens on the atom are replaced. For example, a pyridyl group substituted by oxo is a pyridone. Combinations of substituents and / or variables are permissible only if such combinations result in stable compounds or useful synthetic intermediates. The phrase “optionally substituted X,” as used herein, is intended to be equivalent to “X, in which X is optionally substituted” (e.g., “alkyl, in which said alkyl is optionally substituted”). It is not intended to mean that the feature “X” (e.g., alkyl) per se is optional. The term “optionally substituted,” as used herein, refers to having 0, 1, or more substituents (e.g., 0-10 substituents, 0-5 substituents, or 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 substituents). Alkyl, alkylene, alkoxy, amino, carbocyclyl, aryl, arylene, aryloxy, heteroaryl, and heterocyclyl groups may be substituted with carbocyclyl (e.g., cycloalkyl); aryl; heteroaryl; heterocyclyl; halo; OR, in which R is H, alkyl, carbocyclyl (e.g., cycloalkyl), aryl, heteroaryl, or heterocyclyl; SR, in which R is H, alkyl, cycloalkyl, aryl, heteroaryl, or heterocyclyl; CN; NO2; N3; NRR’; in which each of R and R’ is, independently, H, alkyl, cycloalkyl, aryl, heteroaryl, or heterocyclyl; SO2R, in which R is H, alkyl, or aryl; SO2NRR’, in which each of R and R’ is, independently, H, alkyl, or aryl; SOR, in which R is H, alkyl, or aryl; or P(O)(OR)2, in which each R is, independently, H or alkyl. Amino, aryl, carbocyclyl, heteroaryl, and heterocyclyl groups may also be substituted with alkyl. Alkyl, alkylene, carbocyclyl, and heterocyclyl groups may also be substituted with oxo or =NR, in which R is H or alkyl. Alkyl and alkylene groups may also be substituted with spirocyclic carbocycle (e.g., spirocyclic cycloalkyl) or spirocyclic heterocyclyl. In some embodiments, a substituent is further substituted with one or more substituents as described herein. For example, a C1 alkyl group, i.e., methyl, may be substituted with oxo to form a formyl group and further substituted with OH or NR2 to form a carboxyl group or an amido group. The term “complement-mediated disorder,” as used herein, refers to a disorder in which the amount or activity of complement is such as to cause disorder in an individual. As used herein, a compound having “complement C1 esterase (C1s) inhibiting activity” refers to a compound exhibiting an IC50 of less than 1 µM against as determined with a human complement C1s enzyme assay as described in Example 3 herein. The term “pharmaceutical composition,” as used herein, refers to one or more active compounds, formulated together with one or more pharmaceutically acceptable excipients. In some embodiments, a compound of the disclosure (e.g., is present in a unit dose amount appropriate for administration in a therapeutic regimen that shows a statistically significant probability of achieving a predetermined therapeutic effect when administered to a relevant population. In certain embodiments, pharmaceutical compositions may be specially formulated for administration in solid or liquid form, including those adapted for the following: oral administration, for example, drenches (aqueous or non-aqueous solutions or suspensions), tablets, or capsules; and parenteral administration, for example, by subcutaneous, intramuscular, or intravenous injection. As used herein, the term “pharmaceutically acceptable salt” represents those salts of the compounds described that are, within the scope of sound medical judgment, suitable for use in contact with the tissues of humans and animals without undue toxicity, irritation, allergic response and the like and are commensurate with a reasonable benefit / risk ratio. Pharmaceutically acceptable salts are well known in the art. For example, pharmaceutically acceptable salts are described in: Berge et al., J. Pharmaceutical Sciences 66:1-19, 1977 and in Handbook of Pharmaceutical Salts: Properties, Selection, and Use, (Eds. P.H. Stahl and C.G. Wermuth), Wiley-VCH, 2008. These salts may be acid addition salts involving inorganic or organic acids. The salts can be prepared in situ during the final isolation and purification of the compounds described herein or separately by reacting the free base group with a suitable acid. The term “pharmaceutically acceptable excipient,” as used herein, refers to any inactive ingredient (for example, a vehicle capable of suspending or dissolving the active compound) that is biocompatible and suitable for administration to a subject. Typical excipients include, for example: antiadherents, antioxidants, binders, coatings, compression aids, disintegrants, dyes, emollients, emulsifiers, diluents, film formers or coatings, flavors, fragrances, glidants, lubricants, preservatives, printing inks, sorbents, suspending or dispersing agents, sweeteners, or waters of hydration. Those of ordinary skill in the art are familiar with a variety of agents and materials useful as excipients. The term “subject,” as used herein, can be a human, non-human primate, or other non-human mammal, such as but not limited to dog, cat, horse, cow, pig, goat, monkey, rat, mouse, and sheep. In preferred embodiments, the subject is a human. As used herein, and as well understood in the art, “to treat” a condition or “treatment” of various diseases and disorders is an approach for obtaining beneficial or desired results, such as clinical results. Beneficial or desired results can include, but are not limited to, alleviation of one or more symptoms or conditions; diminishment of extent of disease, disorder, or condition; stabilizing (i.e., not worsening) of the state of disease, disorder, or condition; delay or slowing in the progress of the disease, disorder, or condition; amelioration or palliation of the disease, disorder, or condition; and remission (whether partial or total), whether detectable or undetectable. “Palliating” a disease, disorder, or condition means that the extent and / or undesirable clinical manifestations of the disease, disorder, or condition are lessened and / or the time course of the progression is slowed or lengthened, as compared to the extent or time course in the absence of treatment. A “therapeutically effective amount” or an “effective amount” of an active compound pharmaceutical composition of the present disclosure refers an amount effective, when administered to a subject, to provide a therapeutic benefit, such as an amelioration of symptoms or reduction or diminution of the disease itself. In one embodiment, a therapeutically effective amount is an amount sufficient to prevent a significant increase, or will significantly reduce, the detectable level of hemolysis in the patient’s blood, serum, or tissues. Detailed Description Active Compounds The present disclosure provides compounds and salts useful for the treatment of a disorder mediated by the complement cascade (e.g., a disorder mediated by C1s). In some embodiments, a compound of the present disclosure is a compound described by Formula (I): or a pharmaceutically acceptable salt thereof, in which: X4X5R3X3X2A is R4X1, in which X1is O, S, C(Ra)2, or NRa, in which each Rais independently selected from absent, H, C1-C6alkyl, C1-C6haloalkyl, and C3-C6cycloalkyl; X2is N or CRb, in which Rbis absent or H; each of X3, X4, and X5is independently selected from NRcand C(Rc)2, in which each Rcis independently selected from absent, H, halo, NH2, NH(C1-C6alkyl), N(C1-C6alkyl)2, and C1-C6 alkyl, and only one of X3and X5can be NRcwhen X4is NRc; R3is H or halo; R4is H, halo, NH2, NH(C1-C6 alkyl), N(C1-C6alkyl)2, C1-C6alkyl, or C3-C6cycloalkyl; and each is independently selected from a single bond and a double bond; each of R1and R1is independently selected from H, halo, C1-C6 alkyl, C1-C6 haloalkyl, C1-C6 hydroxyalkyl, and (C1-C6 alkoxy)(C1-C6 alkyl); each of R2, R2’, R5, and R5’is independently selected from H; halo; OH; C1-C6alkyl; C1-C6haloalkyl; C1-C6 alkoxy; C1-C6 haloalkoxy; C1-C6 hydroxyalkyl; (C1-C6 alkoxy)(C1-C6 alkyl); OCH2P(O)(ORf)2, in which each Rfis independently selected from H and C1-C6 alkyl; and (4- to 10- membered heterocyclyl)oxy containing 1, 2, or 3 ring atoms independently selected from N, O, and S and optionally substituted with oxo; or R2and R2’, together with the carbon atom to which they are attached, form spirocyclic C3-C8 cycloalkyl or 4- to 6-membered spirocyclic heterocycloalkyl containing 1 or 2 oxygen ring atoms; or R2and R5or R2’and R5’, together with the carbon atoms to which each is attached, form cyclopropyl; R6is H or C1-C6 alkyl; each of X and X’ is independently selected from N and CRd, in which Rdis H, halo, C1-C6 alkyl, C1-C6 haloalkyl, C1-C6 alkoxy, C1-C6 haloalkoxy, or cyclopropyl; L1is a bond, NH, NHC(O), NHC(O)O, NHC(O)NH, or NHS(O)2; L2is a bond or C1-C6 alkylene optionally substituted with one or more substituents independently selected from C1-C6alkyl, C1-C6haloalkyl, C1-C6hydroxyalkyl, (C1-C6alkoxy)(C1-C6alkyl), and oxo; L3is a bond, NH, NHC(O), C(O), O, or S(O)2CH2; and B is C6-C14 aryl; C3-C14 carbocyclyl; 5- to 14-membered heterocyclyl containing 1, 2, or 3 ring atoms independently selected from N, O, and S; or 5- to 10-membered heteroaryl containing 1, 2, or 3 heteroatoms independently selected from N, O, and S; in which B is optionally substituted with one or more substituents independently selected from halo; cyano; COORe, in which Reis H or C1-C6alkyl; S(O)2(C1-C6 alkyl); C1-C6 alkyl; C1-C6 haloalkyl; C1-C6 alkoxy; C1-C6 haloalkoxy; C6-C14 aryl optionally substituted with one or more substituents independently selected from halo, COOH, SF5, S(O)2NH2, S(O)2(C1-C6alkyl), S(O)(NH)CH3, P(O)(OH)2, P(O)(OH)CH3, C1-C6alkyl, C1-C6haloalkyl, C1-C6alkoxy, C1-C6haloalkoxy, and C3-C6carbocyclyl; C6-C14aryloxy optionally substituted with one or more halo; C3- C6 cycloalkyl optionally substituted with one or more halo; C3-C6 cycloalkyloxy optionally substituted with one or more halo; (C3-C8 cycloalkyl)(C1-C6 alkyl); (C6-C14 aryl)(C1-C6 alkyl); 5- to 8-membered heterocyclyl containing 1, 2, or 3 ring atoms independently selected from N, O, and S and optionally substituted with one or more substituents independently selected from C1-C6alkyl, OH, C1-C6hydroxyalkyl, and oxetanyl; 6-membered heteroaryloxy containing 1 or 2 nitrogen ring atoms and optionally substituted with C1-C6 alkyl; and 5- or 6-membered heteroaryl containing 1, 2, or 3 ring atoms independently selected from N, O, and S and optionally substituted with one or more substituents selected from halo, C1-C6alkyl, and C1-C6haloalkyl. Exemplary Embodiments of Compounds of the Present Disclosure In some embodiments, when A is , at least one of the following is true: (i) L1is a bond, NHC(O), NHC(O)O, NHC(O)NH, or NHS(O)2; (ii) L2is a bond or C2-C6 alkylene optionally substituted with one or more substituents independently selected from C1-C6alkyl, C1-C6haloalkyl, C1-C6hydroxyalkyl, (C1-C6alkoxy)(C1-C6alkyl), and oxo; (iii) L3is NH, NHC(O), C(O), O, or S(O)2CH2; (iii) at least one of R2, R2’, R5, and R5’is not H; (iv) at least one of R1and R1’is not H; (v) X’ is N; and (vi) B is not . In some embodiments, the compound is of Formula (I’): or a pharmaceutically acceptable salt thereof. In some embodiments, the compound is of Formula (I”): or a pharmaceutically acceptable salt thereof. In some embodiments, the A group provides improved potency, metabolic stability, permeability, pharmacokinetics, and / or oral bioavailability. In some embodiments, A is . In some embodiments, X3is N. In some embodiments, X3is CRc. In some embodiments, X3is CH. In some embodiments, X3is CNH2. In some embodiments, X5is N. In some embodiments, X5is CRc. In some embodiments, X5is CH. In some embodiments, X5is C(C1-C6 alkyl). In some embodiments, X5is C(CH3). In some embodiments, X5is CNH2. In some embodiments, X4is N. In some embodiments, X1is S. In some embodiments, X1is O. In some embodiments, X1is NRa. In some embodiments, X1is NH. In some embodiments, X1is N(C1-C6 alkyl). In some embodiments, X1is NCH3. In some embodiments, X1is NCH2CH3. In some embodiments, X1is N(C1-C6 haloalkyl). In some embodiments, X1is NCHF2. In some embodiments, X1is N(C3-C6 cycloalkyl). In some embodiments, X1is N(cyclopropyl). In some embodiments, A is . In some embodiments, X3is N. In some embodiments, X4is C(Rc)2. In some embodiments, X4is CH2. In some embodiments, X4is N. In some embodiments, X3is C(Rc)2. In some embodiments, X3is CH2. In some embodiments, X1is S. In some embodiments, X1is O. In some embodiments, X1is NRa. In some embodiments, X1is NH. In some embodiments, X1is N(C1-C6alkyl). In some embodiments, X1is NCH3. In some embodiments, X1is NCH2CH3. In some embodiments, X1is N(C1-C6 haloalkyl). In some embodiments, X1is NCHF2. In some embodiments, X1is N(C3-C6 cycloalkyl). In some embodiments, X1is N(cyclopropyl). In some embodiments, A is . In some embodiments, X1is CRa. In some embodiments, X1is C(C1-C6alkyl). In some embodiments, X1is CCH3. In some embodiments, X1is CH. In some embodiments, X2is N. In some embodiments, X3is CH. In some embodiments, X4is CH. In some embodiments, R3is H. In some embodiments, R3is halo. In some embodiments, R3is F. In some embodiments, R4is H. In some embodiments, R4is NH2. In some embodiments, R4is halo. In some embodiments, R4is Cl. In some embodiments, R4is C1-C6alkyl. In some embodiments, R4is methyl. In some embodiments, R4is C3-C6 cycloalkyl. In some embodiments, R4is cyclopropyl. In some embodiments, A is . In some embodiments, A is . In some embodiments, A is . In some embodiments, A is . In some embodiments, A is N N . In some embodiments, A is . In some embodiments, A is . In some embodiments, A is . In some embodiments, A is . , . In some embodiments, embodiments, A is . In some embodiments, A is . In some embodiments, A is . , . In some embodiments, A is In some embodiments, In some embodiments, R1is H. In some embodiments, R1’is H. In some embodiments, the bicyclic core (including variables R2, R2’, R5, R5’, R6, X, and X’) provides improved potency, improved pharmacokinetics, and / or reduced hERG inhibition. In some embodiments, R2is H. In some embodiments, R2is halo. In some embodiments, R2is F. In some embodiments, R2is C1-C6alkyl. In some embodiments, R2is methyl. In some embodiments, R2is C1-C6 alkoxy. In some embodiments, R2is methoxy. In some embodiments, R2is OH. In some embodiments, R2is (C1-C6 alkoxy)(C1-C6 alkyl). In some embodiments, R2is methoxymethyl. In some embodiments, R2’is H. In some embodiments, R2’is halo. In some embodiments, R2’is F. In some embodiments, R2’is C1-C6alkyl. In some embodiments, R2’is methyl. In some embodiments, R2’is C1-C6alkoxy. In some embodiments, R2’is methoxy. In some embodiments, R2’is OH. In some embodiments, R2’is (C1-C6 alkoxy)(C1-C6 alkyl). In some embodiments, R2’is methoxymethyl. In some embodiments, R2’is OCH2P(O)(ORf)2. In some embodiments, R2’is OCH2P(O)(OH)2. In some embodiments, R2’is OCH2P(O)(OH)(OCH2CH3). In some embodiments, R2’is OCH2P(O)(OCH2CH3)2. In some embodiments, R2and R2’, together with the carbon atom to which they are attached, form spirocyclic C3-C8cycloalkyl. In some embodiments, R2and R2’, together with the carbon atom to which they are attached, form spirocyclic cyclopropyl. In some embodiments, R2and R2’, together with the carbon atom to which they are attached, form spirocyclic cyclopentyl. In some embodiments, R2and R5, together with the carbon atoms to which they are attached, form cyclopropyl. In some embodiments, R2’and R5’, together with the carbon atoms to which they are attached, form cyclopropyl. In some embodiments, R5is H. In some embodiments, R5’is H. In some embodiments, R6is H. In some embodiments, R6is CH3 In some embodiments, X is N. In some embodiments, X is CRd. In some embodiments, X is CCH3. In some embodiments, X is CH. In some embodiments, X is CCl. In some embodiments, X is C(C1-C6 haloalkyl). In some embodiments, X is CCF3. In some embodiments, X is C(C1-C6 haloalkoxy). In some embodiments, X is C(OCF3). In some embodiments, X’ is N. In some embodiments, X’ is CRd. In some embodiments, X’ is CCH3. In some embodiments, X’ is CH. In some embodiments, only one of X and X’ is N. In some embodiments, the -L1-L2-L3-B fragment provides improved potency, metabolic stability, permeability, pharmacokinetics, and / or protease selectivity. In some embodiments, L1is NH. In some embodiments, L1is NHC(O). In some embodiments, L2is a bond. In some embodiments, L2is C1-C6alkylene optionally substituted with C1-C6 alkyl or C1-C6 hydroxyalkyl. In some embodiments, L2is -CH2-. In some embodiments, L2is -(CH2)2-. In some embodiments, L2is -(CH2)3-. In some embodiments, L2is - CH(CH3)-. In some embodiments, L2is -CH(CH3)CH2-. In some embodiments, L2is -CH(CH2OH)-. In some embodiments, L3is a bond. In some embodiments, L3is O. In some embodiments, L3is C(O). H H N N In some embodiments, -L1-L2-L3- is . In some embodiments, -L1-L2-L3- is . In H H N N some embodiments, -L1-L2-L3- is . In some embodiments, -L1-L2-L3- is . In H H N N some embodiments, -L1-L2-L3- is . In some embodiments, -L1-L2-L3- is . In some H H N N embodiments, -L1-L2-L3- is . In some embodiments, -L1-L2-L3- is . In some H H N N embodiments, -L1-L2-L3- isO. In some embodiments, -L1-L2-L3- isO. In some H NOH 1-L2-L3N Oembodiments, -L - isO. In some embodiments, -L1-L2-L3- is . In some H H N N embodiments, -L1-L2-L3- isO. In some embodiments, -L1-L2-L3- isOH. In some embodiments, B is phenyl optionally substituted with one or more substituents independently selected from halo; cyano; COORe, in which Reis C1-C6alkyl; S(O)2(C1-C6alkyl); C1-C6alkyl; C1-C6 haloalkyl; C1-C6 alkoxy; C1-C6 haloalkoxy; phenyl optionally substituted with one or more halo; phenoxy; C3-C6 cycloalkyl; C3-C6 cycloalkyloxy optionally substituted with 1 or 2 halo; 5- to 8-membered heterocyclyl containing 1 or 2 ring atoms independently selected from N and O and optionally substituted with hydroxymethyl or oxetanyl; 5- or 6-membered heteroaryl containing 1, 2, or 3 ring atoms independently selected from N, O, and S and optionally substituted with one or more substituents selected from halo, C1-C6 alkyl, C1-C6 haloalkyl, and cyclopropyl; and -O(pyridyl). In some embodiments, B is F F . In some embodiments, B is . In some embodiments, B is . In some O F N embodiments, B is . In some embodiments, B isF. In some embodiments, B is O F S O Cl . In some embodiments, B is . In some embodiments, B is . In some O Cl O embodiments, B is . In some embodiments, B is . In some embodiments, B is S CF3CN N . In some embodiments, B is . In some embodiments, B is . In some O embodiments, B is . In some embodiments, B is . In some embodiments, B is NNS N N . In some embodiments, B is . In some embodiments, B is . In some N S N N CFembodiments, B is3. In some embodiments, B is . In some embodiments, B is F F S N N N F . In some embodiments, B is . In some embodiments, B is . In N N N F some embodiments, B is . In some embodiments, B is . In some embodiments, N N S N N F B is . In some embodiments, B is . In some embodiments, B is . F N N F In some embodiments, B is . In some embodiments, B is . In some O N N embodiments, B is . In some embodiments, B is . In some embodiments, B is S S N N N . In some embodiments, B is . In some embodiments, B is . In ONON N some embodiments, B is . In some embodiments, B is and . In some O O embodiments, B is . In some embodiments, B is . In some embodiments, B F F O O is . In some embodiments, B isF. In some embodiments, B isF. In some embodiments, B is . In some embodiments, B is . In some embodiments, B is OFO O F N . In some embodiments, B is . In some embodiments, B isN. O O In some embodiments, B is . In some embodiments, B is . In some OH O N F embodiments, B is . In some embodiments, B is F . In some FFO O embodiments, B is . In some embodiments, B isF F. In some embodiments, B O N N is . In some embodiments, B is naphthyl optionally substituted with one or more substituents selected from halo and C1-C6 alkoxy. In some embodiments, B is . In some embodiments, B is O Cl . In some embodiments, B is . In some embodiments, B is C3-C14carbocyclyl optionally substituted with phenyl.In some embodiments, B is . In some embodiments, B is C3-C6cycloalkyl optionally substituted with phenyl optionally substituted with one or more halo; benzoxazolyl optionally substituted with one or more halo or C1-C6 alkyl, -O(pyridyl) optionally substituted with C1-C6 alkyl, thiazolopyridinyl, oxazolopyridinyl optionally substituted with C1-C6alkyl, or benzothiazolyl, or phenoxy optionally substituted with one or more halo. In some embodiments, B is cyclohexyl. In some embodiments, B is . In some F embodiments, B is . In some embodiments, B is . In some embodiments, B is N N N O O O . In some embodiments, B is . In some embodiments, B is . In N S O N some embodiments, B is . In some embodiments, B is . In some S S N N N embodiments, B is . In some embodiments, B isN. In some O S N N N embodiments, B is . In some embodiments, B isN. In some O O N N N N embodiments, B is . In some embodiments, B is . In some O O N N N N embodiments, B is . In some embodiments, B is . In some embodiments, O O N N B is . In some embodiments, B is . In some embodiments, B is O O N O N N . In some embodiments, B is . In some embodiments, B is . O O N N In some embodiments, B isF. In some embodiments, B isF. In some OO FN F N embodiments, B is . In some embodiments, B is . In some embodiments, F F O B is . In some embodiments, B is . In some embodiments, B is 5- to 14-membered heterocyclyl containing 1 or 2 ring atoms independently selected from O and N and optionally substituted with C1-C6alkyl and further optionally substituted with pyridyl or phenyl optionally substituted with one or more halo. In some embodiments, B is O O O . In some embodiments, B is . In some embodiments, B is . In ONO some embodiments, B isO. In some embodiments, B is . In some F N N embodiments, B isN. In some embodiments, B is . In some embodiments, B is N F . In some embodiments, B is 5- to 10-membered heteroaryl containing 1, 2, or 3 ring atoms independently selected from N, O, and S; in which B is optionally substituted with one or more substituents independently selected from halo; C1-C6 alkyl; C1-C6 haloalkyl; C1-C6 alkoxy; phenoxy; phenyl optionally substituted with one or more substituents selected from halo, COOH, S(O)2NH2, S(O)2(C1- C6alkyl), C1-C6alkyl, C1-C6haloalkyl, C1-C6alkoxy, C1-C6haloalkoxy, and C3-C6cycloalkyl; C3-C6carbocyclyl optionally substituted with C1-C6 alkyl or halo; (C3-C6 cycloalkyl)(C1-C6 alkyl); phenyl(C1-C6 alkyl); 5- to 8-membered heterocyclyl containing 1 or 2 ring atoms independently selected from N and O and optionally substituted with halo, OH, C1-C6alkyl, C1-C6hydroxyalkyl, and oxetanyl; and 5- or 6- membered heteroaryl containing 1 or 2 ring atoms independently selected from N, O, and S and optionally substituted with one or more substituents independently selected from C1-C6 alkyl and halo. In some embodiments, B is 6-membered heteroaryl containing 1 or 2 nitrogen ring atoms and optionally substituted with C1-C6alkyl; C1-C6alkoxy; phenoxy; C3-C6cycloalkyl optionally substituted with one or more substituents independently selected from C1-C6alkyl and halo; 5- to 8-membered heterocyclyl containing one or two nitrogen ring atoms and optionally substituted with one or more substituents independently selected from halo, OH, C1-C6 alkyl, C1-C6 hydroxyalkyl, and oxetanyl; and 5- membered heteroaryl containing 1 or 2 ring atoms independently selected from N and S. In some N NSN embodiments, B is . In some embodiments, B is . In some embodiments, B is N N N N N . In some embodiments, B is . In some embodiments, B is . In some O O N N embodiments, B is . In some embodiments, B is . In some embodiments, B is O O O N N N . In some embodiments, B is . In some embodiments, B is . In NO N Osome embodiments, B is . In some embodiments, B is . In some NO N OF embodiments, B is . In some embodiments, B is F . In some embodiments, B isN O N OO N . In some embodiments, B is . In some embodiments, B isN. In NON some embodiments, B isO. In some embodiments, B isN. In some embodiments, OH NN N NB isN. In some embodiments, B isN. In some embodiments, B is OH OH NN N NO N . In some embodiments, B is . In some embodiments, B isN N. FFO O N F In some embodiments, B isN. In some embodiments, B is F . In some NO N OF F embodiments, B isNF . In some embodiments, B isNF . In some embodiments, B is OH NON N OH N NN F F . In some embodiments, B isN. In some embodiments, B isN. In NN N NOH N N some embodiments, B is . In some embodiments, B isHO. In some embodiments, OH NNOHN NB isN. In some embodiments, B isN. In some embodiments, B is F O F N NN N NO N N . In some embodiments, B isN. In some embodiments, B isN. In some embodiments, B is 5-membered heteroaryl containing 1, 2, or 3 ring atoms independently selected from N, O, and S (e.g., furan, thiophene, oxazole, isooxazole, oxadiazole, thiazole, isothiazole, thiadiazole, pyrazole, or triazole) and optionally substituted with one or more substituents independently selected from halo; C1-C6 alkyl; C1-C6 haloalkyl; C1-C6 alkoxy; phenyl optionally substituted with one or more substituents selected from halo, COOH, S(O)2NH2, S(O)2(C1-C6alkyl), C1-C6alkyl, C1-C6haloalkyl, C1-C6alkoxy, and C3-C6cycloalkyl; C3-C6carbocyclyl; (C3-C6cycloalkyl)(C1-C6alkyl); phenyl(C1-C6alkyl); 5- or 6-membered heterocyclyl containing 1 or 2 ring atoms independently selected from N and O and optionally substituted with OH; and 5- or 6-membered heteroaryl containing 1 or 2 ring atoms independently selected from N and O and optionally substituted with one or more substituents independently selected from halo and C1-C6alkyl. In some embodiments, B is 5-membered heteroaryl containing 1, 2, or 3 ring atoms independently selected from N and O and substituted with phenyl optionally substituted with one or more substituents independently selected from halo and C1-C6haloalkoxy. In some embodiments, B is isoxazolyl, thiadiazolyl, or oxadiazole, in which B is substituted with phenyl or pyridyl, each of which is optionally substituted one or more substituents independently selected from halo and C1-C6 alkyl. N O O N In some embodiments, B is . In some embodiments, B is . In some NNNNNN embodiments, B isF. In some embodiments, B is . In some embodiments, B is FONONF ONF F . In soClO me embodiments, B is . In some embodiments, B is . F F NNN N N In some embodiments, B is . In some embodiments, B is F . In some F N S N embodiments, B is . In some embodiments, B is . In some embodiments, B is Cl N NN FN N N . In some embodiments, B is . In some embodiments, B is . In some N N N N embodiments, B is . In some embodiments, B is . In some embodiments, B is Cl N N N N N N . In some embodiments, B is . In some embodiments, B is . In some NN ClN N embodiments, B is . In some embodiments, B is . In some embodiments, B is N N N NFN N . In some embodiments, B is . In some embodiments, B is . In some N N O S S N embodiments, B is . In some embodiments, B is. In some embodiments, B isN. O S S NIn some embodiments, B isN. In some embodiments, B is . In some embodiments, BONO S N N is . In some embodiments, B is . In some embodiments, B is . In S S N some embodiments, B isN. In some embodiments, B isN. In some embodiments, S OO FN B isN. In some embodiments, B is . In some embodiments, B is . In some S S N N S N embodiments, B isN. In some embodiments, B is . In some embodiments, B isN. S O N N In some embodiments, B isN. In some embodiments, B isN. In some embodiments, B S N S N isN. In some embodiments, B isN. In some embodiments, B is . In some O O O N embodiments, B isN. In some embodiments, B isN. In some embodiments, B is . In F SONsome embodiments, B isN. In some embodiments, B is . In some embodiments, B is SFS S N N N N . In some embodiments, B isN. In some embodiments, B isN. In some F S S N N embodiments, B isN. In some embodiments, B isN. In some embodiments, B is N S N N N N O N . In some embodiments, B isO. In some embodiments, B isN. In some NCF3SSN embodiments, B isN. In some embodiments, B isN. In some embodiments, B is F Cl S S S N N N N . In some embodiments, B isN. In some embodiments, B isN. In some N N S N S N embodiments, B isN. In some embodiments, B isN. In some embodiments, B is N CF O3S ClS S N N N N . In some embodiments, B is . In some embodiments, B isN. In some F NFN O O embodiments, B isN. In some embodiments, B isN. In some embodiments, B is N N O S S S N N N N . In some embodiments, B isN. In some embodiments, B isN. In some N O SN FN embodiments, B isN. In some embodiments, B isO. In some embodiments, B is N F F O S S N N N . In some embodiments, B is . In some embodiments, B isO. In some S S N N embodiments, B isN. In some embodiments, B isN. In some embodiments, B is O O S S N NS FN N . In some embodiments, B isN. In some embodiments, B is . In some F SS FN embodiments, B is . In some embodiments, B isN. In some embodiments, B is F F N N S S O N . In some embodiments, B isN. In some embodiments, B isN. In some N F N S N N embodiments, B isNO . In some embodiments, B isN. In some embodiments, B is N N N N N N N N N O . In some embodiments, B isO. In some embodiments, B isO. In some N N N S O N embodiments, B isN. In some embodiments, B isN. In some embodiments, B is N N N S S S N N . In some embodiments, B is . In some embodiments, B isN. In some O N S NS SNO Oembodiments, B isN. In some embodiments, B isN. In some embodiments, B is N N SOS N N N O N . In some embodiments, B is . In some embodiments, B isN. In some F F N N S S N N embodiments, B isN. In some embodiments, B isN. In some embodiments, B is F O N SSNN FNO NH2N O N . In some embodiments, B isO. In some embodiments, B isN. In some F N S O N embodiments, B isN. In some embodiments, B isN. In some embodiments, B is F N SS COOH S FN N N N . In some embodiments, B isN. In some embodiments, B isN. In some S S F N F O embodiments, B isN. In some embodiments, B isN. In some embodiments, B isN. OF N N FIn some embodiments, B isN. In some embodiments, B is . In some embodiments, B N N O S O isF. In some embodiments, B isN. In some embodiments, B isN. In some N N SN FN embodiments, B isN. In some embodiments, B isO. In some embodiments, B is F HN N N NN N O . In some embodiments, B isF. In some embodiments, B isF. In OH O N S N S N N N some embodiments, B is . In some embodiments, B is . In some embodiments, B is F SS NN S N N N . In some embodiments, B is . In some embodiments, B isF. In someN SN N embodiments, B isF. In some embodiments, B isF. In some embodiments, B is F N Cl Cl S NN O N ON N N . In some embodiments, B is . In some embodiments, B is . In some ON O Nembodiments, B isN N. In some embodiments, B isN. In some embodiments, B is Cl NO NO N ON N N . In some embodiments, B is . In some embodiments, B is . Cl N Cl OO NN N In some embodiments, B is . In some embodiments, B is . In some ON O NN N N embodiments, B is . In some embodiments, B is . In some embodiments, B is ON O N O NN N N . In some embodiments, B is . In some embodiments, B is . In ONN ONN N some embodiments, B is . In some embodiments, B is . In some ON O NF N N embodiments, B is . In some embodiments, B is . In some ONO NN embodiments, B isF. In some embodiments, B isF. In some embodiments, B is ON O N O NN N F . In some embodiments, B isF. In some embodiments, B isF F. In some ONN Oembodiments, B isF. In some embodiments, B isF. In some embodiments, B is ON O N O NN . In some embodiments, B is . In some embodiments, B is . In NO NOsome embodiments, B isF. In some embodiments, B is . In some embodiments, F ONO NN B is . In some embodiments, B is . In some embodiments, B is ON O N N O NN N N F . In some embodiments, B isF. In some embodiments, B is H . InO NNO NO N N some embodiments, B is . In some embodiments, B is . In some embodiments, Cl Cl NO N O N ON N N B is . In some embodiments, B is . In some embodiments, B is . In NO N ON N some embodiments, B is . In some embodiments, B isF. In some embodiments, NO N ON ON N B isF. In some embodiments, B isF. In some embodiments, B isN. NO N ON F N In some embodiments, B is . In some embodiments, B is . In some NO N ON N embodiments, B is . In some embodiments, B is . In some embodiments, B is F NO N O N ON N . In some embodiments, B is . In some embodiments, B isF. In F NO N Osome embodiments, B isF. In some embodiments, B isF. In some embodiments, B ClNClNN N S O N N N O N is . In some embodiments, B is . In some embodiments, B is . In some Cl ClNN N S N S N S N N N N embodiments, B is . In some embodiments, B is . In some embodiments, B is . F N S N S N N N In some embodiments, B is . In some embodiments, B is . In some embodiments, B is NNNNNNN F . In some embodiments, B isF. In some embodiments, B isF. In some NClNO N O N N N embodiments, B is . In some embodiments, B is . In some embodiments, B is pyridyl optionally substituted with one or more substituents independently selected from halo, C1-C6 alkoxy, and C3-C6 cycloalkyl. In some embodiments, B is NClN Cl N . In some embodiments, B is . In some embodiments, B is . In some O N N embodiments, B isN. In some embodiments, B is . In some embodiments, B isF. In N some embodiments, B is . In some embodiments, B is 9-membered bicyclic heteroaryl containing 1, 2, or 3 ring atoms independently selected from N, O, and S and optionally substituted with one or more halo. In some Cl S S embodiments, B is . In some embodiments, B is . In some embodiments, B is S OO ClN . In some embodiments, B is . In some embodiments, B isN. In some SClS embodiments, B is . In some embodiments, B is . In some embodiments, B is F F S OS N. In some embodiments, B is . In some embodiments, B is . In some OO Clembodiments, B isN. In some embodiments, B is . In some embodiments, B is F OF S FO N . In some embodiments, B isN. In some embodiments, B isN. In some NF S Nembodiments, B isS. In some embodiments, B isN. In some embodiments, B is N S N . O H O OH HSONIn some embodiments, B is N . In some embodiments, the compound is of Formula (II): N H O N6O H2N R S L1L3N L2B X' R2 X R2'(II), or a pharmaceutically acceptable salt thereof, in which all variables are as defined herein. In some embodiments, the compound is of Formula (III): H O N O AR6H 1'N BR1 RN X' O 2 X RR2'(III), or a pharmaceutically acceptable salt thereof, in which all variables are as defined herein. In some embodiments, the compound is of Formula (IV): or a pharmaceutically acceptable salt thereof, in which R2’is C1-C6 alkyl or C1-C6 alkoxy, and all other variables are as defined herein. In some embodiments, R2’is CH3. In some embodiments, R2’is OCH3. In some embodiments, the compound is of Formula (V): or a pharmaceutically acceptable salt thereof, in which R2’is H or C1-C6alkyl, and all other variables are as defined herein. In some embodiments, R2’is H. In some embodiments, R2’is CH3. In some embodiments, the compound is of Formula (VI): or a pharmaceutically acceptable salt thereof, in which R2is C1-C6alkyl, and all other variables are as defined herein. In some embodiments, R2is CH3. In some embodiments, the compound is of Formula (VII): or a pharmaceutically acceptable salt thereof, in which variables are as defined herein. In some embodiments, a compound of the disclosure is a compound of Table 1 or a pharmaceutically acceptable salt thereof. In some embodiments, a compound of the disclosure is a compound having C1 esterase (C1s) inhibiting activity. Pharmaceutical Compositions A pharmaceutical composition of the disclosure contains one or more of the compounds disclosed herein (e.g., one or more of the compounds of Formulas (I), (I’), (I”), (II), (III), (IV), (V), (VI), and (VII), and Table 1) as the therapeutic compound. In addition to a therapeutically effective amount of the compound, the pharmaceutical compositions also contain a pharmaceutically acceptable excipient, which can be formulated by methods known to those skilled in the art. In some embodiments, the pharmaceutical compositions for treating cancer contain one or more of the compounds disclosed herein (e.g., one or more of the compounds of Formulas (I), (I’), (I”), (II), (III), (IV), (V), (VI), and (VII), and Table 1) may be formulated and / or administered with or without other therapeutics for a particular condition. Examples of such therapeutics (second therapeutic agents) are described herein. The compounds disclosed herein (e.g., the compounds of Formulas (I), (I’), (I”), (II), (III), (IV), (V), (VI), and (VII), and Table 1) may be used in the form of free base or in the form of salts. All forms are within the scope of the disclosure. Exemplary routes of administration of the pharmaceutical compositions (or the compounds of the composition) include oral, sublingual, buccal, transdermal, intradermal, intramuscular, parenteral, intravenous, intra-arterial, intracranial, subcutaneous, intraorbital, intraventricular, intraspinal, intraperitoneal, intranasal, inhalation, and topical administration. In some embodiments, a compound of the present disclosure (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) is formulated for oral administration. Formulations for Oral Administration The pharmaceutical compositions of the present disclosure include those formulated for oral administration (“oral dosage forms”). Oral dosage forms can be, for example, in the form of tablets, capsules, a liquid solution or suspension, a powder, or liquid or solid crystals, which contain the active ingredient(s) in a mixture with non-toxic pharmaceutically acceptable excipients. These excipients may be, for example, inert diluents or fillers; granulating and disintegrating agents; binding agents; and lubricating agents, glidants, and antiadhesives (e.g., magnesium stearate, zinc stearate, stearic acid, silicas, hydrogenated vegetable oils, or talc). Other pharmaceutically acceptable excipients can be colorants, flavoring agents, plasticizers, humectants, buffering agents, and the like. Pharmaceutical compositions for oral administration may also be presented as chewable tablets, as hard gelatin capsules where the active ingredient is mixed with an inert solid diluent, or as soft gelatin capsules where the active ingredient is mixed with water or an oil medium Powders, granulates, and pellets may be prepared using the ingredients mentioned above under tablets and capsules in a conventional manner using, e.g., a mixer, a fluid bed apparatus or a spray drying equipment. The liquid forms in which the compounds and compositions of the present disclosure can be incorporated for administration orally include aqueous solutions, suitably flavored syrups, aqueous or oil suspensions, and flavored emulsions with edible oils, as well as elixirs and similar pharmaceutical vehicles. Formulations for Parenteral Administration The pharmaceutical compositions of the present disclosure can be administered in a pharmaceutically acceptable parenteral (e.g., intravenous, intramuscular, subcutaneous or the like) formulation as described herein. The pharmaceutical composition may also be administered parenterally in dosage forms or formulations containing conventional, non-toxic pharmaceutically acceptable carriers and adjuvants. In particular, formulations suitable for parenteral administration include aqueous and non- aqueous sterile injection solutions which may contain antioxidants, buffers, bacteriostats and solutes which render the formulation isotonic with the blood of the intended recipient; and aqueous and non- aqueous sterile suspensions which may include suspending agents and thickening agents. For example, to prepare such a composition, the compounds of the present disclosure may be dissolved or suspended in a parenterally acceptable liquid vehicle. Among acceptable vehicles and solvents that may be employed are water; water adjusted to a suitable pH by addition of an appropriate amount of hydrochloric acid, sodium hydroxide, or a suitable buffer; 1,3-butanediol; Ringer’s solution; and isotonic sodium chloride solution. The aqueous formulation may also contain one or more preservatives. Additional information regarding parenteral formulations can be found, for example, in the United States Pharmacopeia-National Formulary (USP-NF), herein incorporated by reference in its entirety. The parenteral formulation can be any of the five general types of preparations identified by the USP-NF as suitable for parenteral administration: (1) “Drug Injection:” a liquid preparation that is a drug substance (e.g., a compound of the present disclosure), or a solution thereof; (2) “Drug for Injection:” the drug substance (e.g., a compound of the present disclosure) as a dry solid that will be combined with the appropriate sterile vehicle for parenteral administration as a drug injection; (3) “Drug Injectable Emulsion:” a liquid preparation of the drug substance (e.g., a compound of the present disclosure) that is dissolved or dispersed in a suitable emulsion medium; (4) “Drug Injectable Suspension:” a liquid preparation of the drug substance (e.g., a compound of the present disclosure) suspended in a suitable liquid medium; and (5) “Drug for Injectable Suspension:” the drug substance (e.g., a compound of the present disclosure) as a dry solid that will be combined with the appropriate sterile vehicle for parenteral administration as a drug injectable suspension. Exemplary formulations for parenteral administration include solutions of the compound prepared in water suitably mixed with a surfactant, e.g., hydroxypropyl cellulose. Dispersions can also be prepared in glycerol, liquid polyethylene glycols, DMSO and mixtures thereof with or without alcohol, and in oils. Under ordinary conditions of storage and use, these preparations may contain a preservative to prevent the growth of microorganisms. Conventional procedures and ingredients for the selection and preparation of suitable formulations are described, for example, in Remington: The Science and Practice of Pharmacy, 23rdEd., Adejare, Ed., Academic Press (2020) and in The United States Pharmacopeia and National Formulary (USP-NF 2021 Issues 1-3), published in 2021. Formulations for parenteral administration may, for example, contain sterile water, saline, polyalkylene glycols (e.g., polyethylene glycol), oils of vegetable origin, or hydrogenated naphthalenes. Biocompatible, biodegradable lactide polymer, lactide / glycolide copolymer, or polyoxyethylene- polyoxypropylene copolymers may be used to control the release of the compounds. Other potentially useful parenteral delivery systems for compounds include ethylene-vinyl acetate copolymer particles, osmotic pumps, implantable infusion systems, and liposomes. Formulations for inhalation may contain, for example, lactose, or may be aqueous solutions containing, for example, polyoxyethylene-9-lauryl ether, glycocholate and deoxycholate, or may be oily solutions for administration in the form of nasal drops, or as a gel. The dosage of the compounds described herein (e.g., the compounds of Formulas (I), (I’), (I”), (II), (III), (IV), (V), (VI), and (VII), and Table 1), and / or compositions including a compound described herein, can vary depending on many factors, such as the pharmacodynamic properties of the compound; the mode of administration; the age, health, and weight of the recipient; the nature and extent of the symptoms; the frequency of the treatment, and the type of concurrent treatment, if any; and the clearance rate of the compound in the subject to be treated. One of skill in the art can determine the appropriate dosage based on the above factors. In general, satisfactory results may be obtained when the compounds described herein are administered to a human at a daily dosage of, for example, between 0.05 mg and 3000 mg (measured as the solid form). For example, the dose range may be 10-1000 mg (e.g., 50-800 mg). Alternatively, the dosage amount can be calculated using the body weight of the patient. For example, the dose of a compound, or pharmaceutical composition thereof, administered to a patient may be 0.1-100 mg / kg. A dosage form containing a compound disclosed herein (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) can be administered, for example, once a day (QD), twice a day (BID), three times a day (TID), four times a day (QID), once every other day (Q2D), once every third day (Q3D), or any dosing schedule as needed, Uses of Active Compounds for Treatment of Selected Disorders In one aspect, an effective amount of an active compound described herein (e.g., any one of the compounds of Formulas (I), (I’), (I”), (II), (III), (IV), (V), (VI), and (VII), and Table 1), or a pharmaceutically acceptable salt thereof) is used to treat a medical disorder which is an inflammatory or immune condition, a disorder mediated by the complement cascade (including a dysfunctional cascade) including a complement-related disorder or alternative complement pathway-related disorder, a disorder or abnormality of a cell that adversely affects the ability of the cell to engage in or respond to normal complement activity, or an undesired complement-mediated response to a medical treatment, such as surgery or other medical procedure or a pharmaceutical or biopharmaceutical drug administration, a blood transfusion, or other allogenic tissue or fluid administration. In some embodiments, the disorder is an autoimmune disease. In some embodiments, the disorder is cancer. In some embodiments, the disorder is an infectious disease. In some embodiments, the disorder is an inflammatory disease. In some embodiments, the disorder is a hematological disease. In some embodiments, the disorder is an ischemia-reperfusion injury. In some embodiments, the disorder is an ocular disease. In some embodiments, the disorder is a renal disease. In some embodiments, the disorder is transplant rejection. In some embodiments, the disorder is antibody-mediated transplant rejection, e.g., acute antibody-mediated rejection. In some embodiments, the disorder is a vascular disease. In some embodiments, the disorder is a vasculitis disorder. In some embodiments, the disorder is a neurodegenerative disorder, e.g., a tauopathy. In some embodiments, the disorder is a medical disorder of the central nervous system (CNS) or peripheral nervous system disorders involving complement activation. In some embodiments, the disorder is an acquired brain or spinal cord injury. In some embodiments, the disorder is ischemic- reperfusion injury. In some embodiments, the disorder is stroke. In some embodiments, the disorder is traumatic brain injury (TBI). In some embodiments, the disorder is spinal cord injury (SCI). In some embodiments, the disorder is a neuroinflammatory disorder. In some embodiments, the neuroinflammatory disorder is cranial arteritis. In some embodiments, the neuroinflammatory disorder is giant cell arteritis. In some embodiments, the neuroinflammatory disorder is Holmes-Adie syndrome. In some embodiments, the neuroinflammatory disorder is inclusion body myositis (IBM). In some embodiments, the neuroinflammatory disorder is meningitis. In some embodiments, the neuroinflammatory disorder is a neurologic paraneoplastic syndrome, e.g., Lambert- Eaton myasthenic syndrome, stiff-person syndrome, encephalomyelitis (inflammation of the brain and spinal cord), myasthenia gravis, cerebellar degeneration, limbic and / or brainstem encephalitis, neuromyotonia, opsoclonus (involving eye movement), or sensory neuropathy. In some embodiments, the neuroinflammatory disorder is polymyositis. In some embodiments, the neuroinflammatory disorder is transverse myelitis. In some embodiments, the neuroinflammatory disorder is vasculitis, e.g., temporal arteritis. In some embodiments, the neuroinflammatory disorder is arachnoiditis. In some embodiments, the neuroinflammatory disorder is Kinsbourne syndrome. In some embodiments, the neuroinflammatory disorder is opsoclonus myoclonus syndrome (OMS). In some embodiments, the neuroinflammatory disorder is Saint Vitus Dance or Sydenham’s chorea (SD) disease. In some embodiments, the disorder is Alzheimer's disease (AD). AD is characterized by two hallmark pathologies; amyloid-β (Aβ) plaques and neurofibrillary tangles comprising hyperphosphorylated tau. Recent studies have implicated complement in AD pathogenesis, including genome-wide association studies identifying single nucleotide polymorphisms (SNPs) associated with risk of late-onset AD in genes encoding complement proteins clusterin (CLU) and CR1 (CR1). See Carpanini et al., Therapeutic Inhibition of the Complement System in Diseases of the Central Nervous System, Front. Immunol., 04 March 2019. Biomarker studies have also identified complement proteins and activation products in plasma and / or CSF that distinguish AD from controls and predict risk of progression to AD. In some embodiments, the disorder is frontotemporal dementia. In some embodiments, the disorder is Pick's disease. In some embodiments, the disorder is sporadic frontotemporal dementia, e.g., frontotemporal dementia with Parkinsonism linked to chromosome 17. In some embodiments, progressive supranuclear palsy (PSP). In some embodiments, corticobasal degeneration (CBD). In some embodiments, the disorder is subacute sclerosing panencephalitis. In some embodiments, the disorder is amyotrophic lateral sclerosis (ALS). ALS is caused by progressive loss of upper and lower (α) motor neurons resulting in denervation of neuromuscular junctions in the peripheral nervous system, progressive muscle weakness, atrophy, spasticity, respiratory failure, and ultimately paralysis and death. Recent studies have shown increased C1q protein in motor cortex and spinal cord of ALS post-mortem tissue; C3 activation fragments and TCC in areas of pathology; C4d and TCC staining of degenerating neurons and glia in ALS motor cortex and spinal cord, and C5aR1 upregulation in areas of pathology. C3d and C4d have been found on oligodendroglia and degenerating neurites, surrounded by CR4-positive microglia, in spinal cord and motor cortex, and C1q, C3, and TCC have been shown to be present on motor endplates in intercostal muscles in ALS donors even early in the disease process. See Carpanini et al., Therapeutic Inhibition of the Complement System in Diseases of the Central Nervous System, Front. Immunol., 04 March 2019. In some embodiments, the disorder is Parkinson's disease (PD). PD is characterized by loss of dopaminergic neurons in the substantia nigra and deposits of the protein α-synuclein that form the pathological hallmarks of the disease, Lewy bodies. Patients present with resting tremor, bradykinesia, and rigidity. Complement activation has been associated with α-synuclein and Lewy bodies in Parkinson's disease; in vitro studies have demonstrated that the disease-associated splice variant α- synuclein 112, but not the full-length protein, cause activation of complement. In vivo, C3d, C4d, C7 and C9 localization in Lewy bodies has been reported. More recently, deposition of iC3b and C9 in Lewy bodies and melanized neurons has been reported, and iC3b immunoreactivity has been shown to be increased with normal ageing and was further elevated in PD vs. age-matched controls. Furthermore, correlation between the ratios of C3 / Aβ42 or FH / Aβ42 in CSF and severity of Parkinson's disease motor and cognitive symptoms has been shown. See Carpanini et al., Therapeutic Inhibition of the Complement System in Diseases of the Central Nervous System, Front. Immunol., 04 March 2019. In some embodiments, the subject to be treated suffers from Parkinson’s Disease with dementia (PDD). In some embodiments, the disorder is Huntington's disease (HD). HD is an autosomal dominant, inherited neurodegenerative disease characterized by progressive motor symptoms, psychiatric disturbances, and dementia. It is caused by expansion of a three-base-pair (CAG) repeat (39–121 repeats vs. normal range 8–39 repeats) in exon 1 of the HTT gene that translates into a polyglutamine tract at the N-terminus of the protein. This results in a polyglutamine length-dependent misfolding and accumulation of huntingtin protein in the striatum and cortex (layers 3, 5, and 6) followed by neuronal loss in these areas which spreads to the hippocampus. It has been shown that neurons, astrocytes, and myelin sheaths in the HD caudate and striatum were immunoreactive for C1q, C4, C3 and neo-epitopes in iC3b and TCC. Expression of mRNA encoding early complement components C1q (c-chain), C1r, C3, and C4, complement regulators C1INH, Clusterin, MCP, DAF and CD59, and complement receptors C3a and C5a, have been shown to be upregulated in the HD striatum, see Carpanini et al., Therapeutic Inhibition of the Complement System in Diseases of the Central Nervous System, Front. Immunol., 04 March 2019. In some embodiments, the disorder is argyrophilic grain dementia. In some embodiments, the disorder is British type amyloid angiopathy. In some embodiments, the disorder is cerebral amyloid angiopathy. In some embodiments, the disorder is Creutzfeldt-Jakob disease. In some embodiments, the disorder is dementia pugilistica. In some embodiments, the disorder is diffuse neurofibrillary tangles with calcification. In some embodiments, the disorder is Down's syndrome. In some embodiments, the disorder is frontotemporal lobar degeneration. In some embodiments, the disorder is Gerstmann- Straussler-Scheinker disease. In some embodiments, the disorder is Hallervorden-Spatz disease. In some embodiments, the disorder is inclusion body myositis. In some embodiments, the disorder is multiple system atrophy (MSA). In some embodiments, the disorder is myotonic dystrophy. In some embodiments, the disorder is Niemann-Pick disease type C. In some embodiments, the disorder is non- Guamanian motor neuron disease with neurofibrillary tangles. In some embodiments, the disorder is postencephalitic parkinsonism. In some embodiments, the disorder is prion protein cerebral amyloid angiopathy. In some embodiments, the disorder is progressive subcortical gliosis. In some embodiments, the disorder is progressive supranuclear palsy. In some embodiments, the disorder is subacute sclerosing panencephalitis. In some embodiments, the disorder is Tangle only dementia. In some embodiments, the disorder is multi-infarct dementia. In some embodiments, the disorder is ischemic stroke. In some embodiments, the disorder is chronic traumatic encephalopathy (CTE). In some embodiments, the disorder is a hereditary motor and sensory neuropathy (HMSN). In some embodiments, the HMSN is Charcot-Marie-Tooth (CMT) disease. In some embodiments, the HSMN is Charcot–Marie–Tooth disease type 1A or type 1B. In some embodiments, the HSMN is Charcot–Marie–Tooth disease type 2. In some embodiments, the HSMN is Dejerine–Sottas disease (Charcot–Marie–Tooth type 3). In some embodiments, the HSMN is Refsum disease. In some embodiments, the HSMN is Charcot–Marie–Tooth with pyramidal features. In some embodiments, the HSMN is Charcot–Marie–Tooth type 6. In some embodiments, the HSMN is HMSN+retinitis pigmentosa. In some embodiments, the disorder is Churg-Strauss syndrome. In some embodiments, the disorder is peripheral artery disease (PAD). In some embodiments, the disorder is myasthenia gravis, e.g., myasthenia gravis with CNS involvement. In some embodiments, the disorder is dementia with Lewy bodies. In some embodiments, the disorder is prion disease. In some embodiments, the disorder is Behcet's Disease. In some embodiments, the disorder is congenital myasthenia. In some embodiments, the disorder is subacute sclerosing panencephalitis (SSPE). In some embodiments, the disorder is a demyelinating disease. In some embodiments, the disorder is demyelinating myelinoclastic disease. In some embodiments, the disorder is demyelinating leukodystrophic disease. In some embodiments, the demyelinating myelinoclastic disease is multiple sclerosis (MS). Multiple sclerosis (MS) is the most common cause of neurological disability in young adults in northern European-Caucasian populations, with an approximate lifetime risk of one in 400. C3 has been shown to be deposited in the brains of MS patients. T-cell clone (TCC) has been shown to be in association with capillary endothelial cells, predominantly within plaques and adjacent white matter. Localization of C activation to areas of active myelin destruction has also been shown, with TCC deposited exclusively in such areas. C3d has been shown to be deposited in association with short segments of disrupted myelin in plaques with low-grade active demyelination and provides evidence for a C contribution to disease progression as well as acute inflammation. See Ingram et al., Complement in multiple sclerosis: its role in disease and potential as a biomarker. Clin Exp Immunol.2009 Feb;155(2):128-39. In some embodiments, the demyelinating myelinoclastic disease is neuromyelitis optica (NMO). Neuromyelitis optica (NMO) is an inflammatory demyelinating disease affecting predominantly the optic nerves and spinal cord. Traditionally seen as a variant of MS, it has been redefined recently according to new criteria using a combination of phenotypic subtyping along with a newly developed biomarker of disease, NMO-immunoglobulin G (IgG) (reported sensitivity of 58–76% and specificity of 85–99% for NMO). NMO patients have higher levels of C3a and anti-C1q antibodies than healthy controls. C3a levels correlated with disease activity, neurological disability and aquaporin-4 IgG. Nytrova et al. J Neuroimmunol.2014 Sep 15;274(1-2):185-91. In some embodiments, the demyelinating myelinoclastic disease is idiopathic inflammatory demyelinating diseases (IIDD). In some embodiments, the demyelinating myelinoclastic disease is anti- NMDA receptor encephalitis. In some embodiments, the demyelinating myelinoclastic disease is acute disseminated encephalomyelitis. In some embodiments, the demyelinating myelinoclastic disease is anti- MOG autoimmune encephalomyelitis. In some embodiments, the demyelinating myelinoclastic disease is chronic relapsing inflammatory optic neuritis (CRION). In some embodiments, the demyelinating myelinoclastic disease is acute disseminated encephalomyelitis (ADEM). In some embodiments, the demyelinating myelinoclastic disease is immune-mediated encephalomyelitis. In some embodiments, the demyelinating myelinoclastic disease is progressive multifocal leukoencephalopathy (PML). In some embodiments, the demyelinating myelinoclastic disease is McDonalds-positive multiple sclerosis. In some embodiments, the demyelinating myelinoclastic disease is acute hemorrhagic leukoencephalitis. In some embodiments, the demyelinating myelinoclastic disease is Rasmussen's Encephalitis. In some embodiments, the demyelinating myelinoclastic disease is Marburg multiple sclerosis. In some embodiments, the demyelinating myelinoclastic disease is pseudotumefactive or tumefactive multiple sclerosis. In some embodiments, the demyelinating myelinoclastic disease is Balo concentric sclerosis. In some embodiments, the demyelinating myelinoclastic disease is diffuse myelinoclastic sclerosis. In some embodiments, the demyelinating myelinoclastic disease is solitary sclerosis. In some embodiments, the demyelinating myelinoclastic disease is multiple sclerosis with cavitary lesions. In some embodiments, the demyelinating myelinoclastic disease is myelocortical multiple sclerosis (MCMS). In some embodiments, the demyelinating myelinoclastic disease is atypical optic-spinal multiple sclerosis. In some embodiments, the demyelinating myelinoclastic disease is pure spinal multiple sclerosis. In some embodiments, the demyelinating myelinoclastic disease is HLA DRB3*02:02 multiple sclerosis. In some embodiments, the demyelinating myelinoclastic disease is autoimmune GFAP astrocytopathy. In some embodiments, the demyelinating myelinoclastic disease is chronic inflammatory demyelinating polyneuropathy (CIDP). In some embodiments, the demyelinating myelinoclastic disease is Guillain– Barré syndrome (acute or chronic). In some embodiments, the demyelinating myelinoclastic disease is progressive inflammatory neuropathy. In some embodiments, the demyelinating myelinoclastic disease is Lewis-Sumner Syndrome. In some embodiments, the demyelinating myelinoclastic disease is combined central and peripheral demyelination (CCPD). In some embodiments, the demyelinating myelinoclastic disease is Bickerstaff brainstem encephalitis. In some embodiments, the demyelinating myelinoclastic disease is Fisher syndrome. In some embodiments, the demyelinating myelinoclastic disease is trigeminal neuralgia. In some embodiments, the demyelinating myelinoclastic disease is NMDAR anti- NMDA receptor encephalitis. In some embodiments, the demyelinating myelinoclastic disease is primary progressive MS (PPMS). In some embodiments, the demyelinating myelinoclastic disease is OPA1 variant multiple sclerosis. In some embodiments, the demyelinating myelinoclastic disease is KIR4.1 multiple sclerosis. In some embodiments, the demyelinating myelinoclastic disease is aquaporin-related multiple sclerosis. In some embodiments, the demyelinating myelinoclastic disease is chronic cerebrospinal venous insufficiency (CCSVI or CCVI). In some embodiments, the demyelinating myelinoclastic disease is diffuse sclerosis. In some embodiments, the demyelinating myelinoclastic disease is Schilder's disease. In certain aspects, the disorder to be treated is a demyelinating leukodystrophic disease. In some embodiments, the demyelinating leukodystrophic disease is myelitis. In some embodiments, the demyelinating leukodystrophic disease is central pontine myelinolysis (CPM). In some embodiments, the demyelinating leukodystrophic disease is extrapontine myelinolysis. In some embodiments, the demyelinating leukodystrophic disease is tabes dorsalis. In some embodiments, the demyelinating leukodystrophic disease is progressive multifocal leukoencephalopathy. In some embodiments, the demyelinating leukodystrophic disease is leukoencephalopathy with vanishing white matter. In some embodiments, the demyelinating leukodystrophic disease is leukoencephalopathy with neuroaxonal spheroids. In some embodiments, the demyelinating leukodystrophic disease is reversible posterior leukoencephalopathy syndrome. In some embodiments, the demyelinating leukodystrophic disease is megalencephalic leukoencephalopathy with subcortical cysts. In some embodiments, the demyelinating leukodystrophic disease is megalencephalic leukoencephalopathy with subcortical cysts 1. In some embodiments, the demyelinating leukodystrophic disease is hypertensive leukoencephalopathy. In some embodiments, the demyelinating leukodystrophic disease is metachromatic leukodystrophy. In some embodiments, the demyelinating leukodystrophic disease is Krabbe disease. In some embodiments, the demyelinating leukodystrophic disease is Canavan disease. In some embodiments, the demyelinating leukodystrophic disease is X-linked adrenoleukodystrophy. In some embodiments, the demyelinating leukodystrophic disease is Alexander disease. In some embodiments, the demyelinating leukodystrophic disease is cerebrotendinous xanthomatosis. In some embodiments, the demyelinating leukodystrophic disease is Pelizaeus–Merzbacher disease. In some embodiments, the demyelinating leukodystrophic disease is Refsum disease. In some embodiments, an effective amount of an active compound described herein, or a pharmaceutically acceptable salt thereof, is used to treat Buerger's disease, also known as thromboangiitis obliterans. In some embodiments, an effective amount of an active compound described herein, or a pharmaceutically acceptable salt thereof, is used to treat giant cell arteritis. In some embodiments, an effective amount of an active compound described herein, or a pharmaceutically acceptable salt thereof, is used to treat Raynaud's disease. In certain aspects, the disorder to be treated is a demyelinating disease of the peripheral nervous system. In some embodiments, the demyelinating disease of the peripheral nervous system is anti-MAG peripheral neuropathy. In some embodiments, the demyelinating disease of the peripheral nervous system is hereditary neuropathy with liability to pressure palsy. In some embodiments, the demyelinating disease of the peripheral nervous system is a copper deficiency-associated condition (e.g., peripheral neuropathy, myelopathy, or rarely optic neuropathy). In some embodiments, an effective amount of an active compound described herein, or a pharmaceutically acceptable salt thereof, is used to treat transverse myelitis. In certain aspects, the disorder to be treated is a peripheral neuropathy. In some embodiments, the peripheral neuropathy is a mononeuropathy. In some embodiments, the neuropathy is a polyneuropathy. In some embodiments, the polyneuropathy is distal axonopathy, diabetic neuropathy, a demyelinating polyneuropathy, small fiber peripheral neuropathy, mononeuritis multiplex, polyneuritis multiplex, autonomic neuropathy, or neuritis. In some embodiments, an effective amount of an active compound described herein, or a pharmaceutically acceptable salt thereof, is used to treat multifocal motor neuropathy. In some embodiments, an effective amount of an active compound described herein, or a pharmaceutically acceptable salt thereof, is used to treat an autoimmune vascular disease. In some embodiments, the autoimmune vascular disease is vasculitis. In some embodiments, the vasculitis includes, but is not limited to, autoimmune inflammatory vasculitis, Cutaneous small-vessel vasculitis, Granulomatosis with polyangiitis , Eosinophilic granulomatosis with polyangiitis, Behçet's disease, Kawasaki disease, Buerger's disease, and "Limited" granulomatosis with polyangiitis vasculitis. In some embodiments, an active compound (e.g., any one of the compounds of Formulas (I), (I’), (I”), (II), (III), (IV), (V), (VI), and (VII), and Table 1) or its salt or composition as described herein is used to treat an arteritis. In some embodiments, the arteritis is giant cell arteritis. In some embodiments, the arteritis is Takayasu arteritis. In some embodiments, the arteritis is temporal arteritis. In some embodiments, the arteritis is polyarteritis nodosa. In some embodiments, a method for the treatment of a glomerulonephritis is provided. In some embodiment, the glomerulonephritis is membranoproliferative glomerulonephritis (MPGN). In some embodiments, the MPGN is MPGN Type I. In some embodiments, the MPGN is MPGN Type II. In some embodiments, the MPGN is MPGN Type III. In some embodiments, the MPGN is C3 glomerulonephritis (C3G). In some embodiments, the MPGN is dense deposit disease (DDD). In some embodiments, the MPGN is a C4 deposition disorder. In some embodiments, the glomerulonephritis is IC-MPGN. In some embodiments, the glomerulonephritis is a membranous glomerulonephritis. In some embodiments, the glomerulonephritis is IgA nephropathy. In some embodiments, the glomerulonephritis is post-infectious glomerulonephritis. In some embodiments, the glomerulonephritis is a rapidly progressive glomerulonephritis, for example Type I (Goodpasture syndrome), Type II, or Type III rapidly progressive glomerulonephritis. In some embodiments, a method for the treatment of paroxysmal nocturnal hemoglobinuria (PNH) is provided that includes the administration of an effective amount of a compound disclosed herein (e.g., any one of the compounds of Formulas (I), (I’), (I”), (II), (III), (IV), (V), (VI), and (VII), and Table 1) or a pharmaceutically acceptable salt thereof to a subject, optionally in a pharmaceutically acceptable composition. In some embodiments, a method for the treatment of hereditary angioedema (HAE) is provided that includes the administration of an effective amount of a compound disclosed herein (e.g., any one of the compounds of Formulas (I), (I’), (I”), (II), (III), (IV), (V), (VI), and (VII), and Table 1) or a pharmaceutically acceptable salt thereof to a subject, optionally in a pharmaceutically acceptable composition. Mutations in the SERPING1 gene cause hereditary angioedema type I and type II. Hereditary angioedema is a disorder characterized by recurrent episodes of severe swelling (angioedema). The most common areas of the body to develop swelling are the limbs, face, intestinal tract, and airway. The SERPING1 gene provides instructions for making the C1 inhibitor protein, which is important for controlling inflammation. C1 inhibitor blocks the activity of certain proteins that promote inflammation. Mutations that cause hereditary angioedema type I lead to reduced levels of C1 inhibitor in the blood, while mutations that cause type II result in the production of a C1 inhibitor that functions abnormally. Without the proper levels of functional C1 inhibitor, excessive amounts of a protein fragment (peptide) called bradykinin are generated. Bradykinin promotes inflammation by increasing the leakage of fluid through the walls of blood vessels into body tissues. Excessive accumulation of fluids in body tissues causes the episodes of swelling seen in individuals with hereditary angioedema type I and type II. In some embodiments, a method for the treatment of cold agglutinin disease (CAD) is provided that includes the administration of an effective amount of a compound disclosed herein (e.g., any one of the compounds of Formulas (I), (I’), (I”), (II), (III), (IV), (V), (VI), and (VII), and Table 1) or a pharmaceutically acceptable salt thereof to a subject, optionally in a pharmaceutically acceptable composition. CAD is a rare autoimmune hemolytic condition with potentially serious acute and chronic consequences that are driven by C1 activation of the classical complement pathway. In some embodiments, a method for the treatment of atypical hemolytic uremic syndrome (aHUS) is provided that includes the administration of an effective amount of a compound disclosed herein (e.g., any one of the compounds of Formulas (I), (I’), (I”), (II), (III), (IV), (V), (VI), and (VII), and Table 1) or a pharmaceutically acceptable salt thereof to a subject, optionally in a pharmaceutically acceptable composition. Atypical hemolytic-uremic syndrome is a disease that primarily affects kidney function. Atypical hemolytic uremic syndrome, which can occur at any age, causes abnormal blood clots (thrombi) to form in small blood vessels in the kidneys. These clots can cause serious medical problems if they restrict or block blood flow. Atypical hemolytic-uremic syndrome is characterized by three major features related to abnormal clotting: hemolytic anemia, thrombocytopenia, and kidney failure. In another embodiment, a method for the treatment of wet or dry age-related macular degeneration (AMD) in a subject is provided that includes the administration of an effective amount of a compound disclosed herein (e.g., any one of the compounds of Formulas (I), (I’), (I”), (II), (III), (IV), (V), (VI), and (VII), and Table 1) or a pharmaceutically acceptable salt thereof to a subject, optionally in a pharmaceutically acceptable composition. In another embodiment, a method for the treatment of rheumatoid arthritis in a subject is provided that includes the administration of an effective amount of a compound disclosed herein (e.g., any one of the compounds of Formulas (I), (I’), (I”), (II), (III), (IV), (V), (VI), and (VII), and Table 1) or a pharmaceutically acceptable salt thereof to a subject, optionally in a pharmaceutically acceptable composition. In another embodiment, a method for the treatment of multiple sclerosis in a subject is provided that includes the administration of an effective amount of a compound disclosed herein (e.g., any one of the compounds of Formulas (I), (I’), (I”), (II), (III), (IV), (V), (VI), and (VII), and Table 1) or a pharmaceutically acceptable salt thereof to a subject, optionally in a pharmaceutically acceptable composition. The active compounds or pharmaceutically acceptable salts thereof disclosed herein, are also useful for administration in combination (in the same or a different dosage form) or alternation with a second pharmaceutical agent for use in ameliorating or reducing a side effect of the second pharmaceutical agent. For example, in some embodiments, the active compound may be used in combination with an adoptive cell-transfer therapy to reduce an inflammatory response associated with such therapy, for example, a cytokine mediated response such as cytokine response syndrome. In some embodiments, the adoptive cell-transfer therapy is a chimeric antigen receptor T-Cell (CAR T), or a dendritic cell used to treat a hematologic or solid tumor, for example, a B-cell related hematologic cancer. In some embodiments, the hematologic or solid tumor is acute lymphoblastic leukemia (ALL), acute myeloid leukemia (AML), non-Hodgkin’s lymphoma, chronic lymphocytic leukemia (CLL), pancreatic cancer, glioblastoma, or a cancer that expresses CD19. In some embodiments, the adoptive cell-transfer therapy is a non-engineered T-cell therapy, in which the T-cells have been activated and / or expanded to one or more viral or tumor antigens. In some embodiments, the associated inflammatory response is a cytokine mediated response. In some embodiments, the second pharmaceutical agent is a cell that has been transformed to express a protein, in which the protein in the subject is mutated or otherwise has impaired function. In some embodiments, the transformed cell includes a CRISPR gene. Another embodiment is provided that includes the administration of an effective amount of an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or a pharmaceutically acceptable salt thereof, optionally in a pharmaceutically acceptable composition to a subject to treat an ocular, pulmonary, gastrointestinal, or other disorder. In other embodiments of the disclosure, an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) provided herein can be used to treat or prevent a disorder in a subject mediated by complement. As examples, the disclosure includes methods to treat or prevent complement associated disorders that are induced by antibody-antigen interactions, a component of an immune or autoimmune disorder or by ischemic injury. The disclosure also provides methods to decrease inflammation or an immune response, including an autoimmune response, where mediated or affected by the classical complement pathway. In some embodiments, the disorder is selected from fatty liver and conditions stemming from fatty liver, such as nonalcoholic steatohepatitis (NASH), liver inflammation, cirrhosis, and liver failure. In some embodiments of the present disclosure, a method is provided for treating fatty liver disease in a subject by administering an effective amount of an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein. In another embodiment, an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein is used to modulate an immune response prior to or during surgery or other medical procedure. One non-limiting example is use in connection with acute or chronic graft versus subject disease, which is a common complication as a result of organ transplantation, allogeneic tissue transplant, and can also occur as a result of a blood transfusion. In some embodiments, the present disclosure provides a method of treating dermatomyositis by administering to a subject in need thereof an effective amount of an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein. In some embodiments, the present disclosure provides a method of treating amyotrophic lateral sclerosis by administering to a subject in need thereof an effective amount of an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein. In some embodiments, the present disclosure provides a method of treating abdominal aortic aneurysm, hemodialysis complications, hemolytic anemia, or hemodialysis by administering to a subject in need thereof an effective amount of an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein. In another embodiment, a method is provided for the treatment or prevention of cytokine or inflammatory reactions in response to the administration of pharmaceutical or biotherapeutic (e.g., CAR T- cell therapy or monoclonal antibody therapy) in a subject by administering an effective amount of an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein. Various types of cytokine or inflammatory reactions may occur in response to a number of factors, such as the administrations of biotherapeutics. In some embodiments, the cytokine or inflammatory reaction is cytokine release syndrome. In some embodiments, the cytokine or inflammatory reaction is tumor lysis syndrome (which also leads to cytokine release). Symptoms of cytokine release syndrome range from fever, headache, and skin rashes to bronchospasm, hypotension, and even cardiac arrest. Severe cytokine release syndrome is described as a cytokine storm and can be fatal. Fatal cytokine storms have been observed in response to infusion with several monoclonal antibody therapeutics. See, Abramowicz D, et al. “Release of tumor necrosis factor, interleukin-2, and gamma-interferon in serum after injection of OKT3 monoclonal antibody in kidney transplant recipients” Transplantation (1989) 47(4):606-8; Chatenoud L, et al. “In vivo cell activation following OKT3 administration. Systemic cytokine release and modulation by corticosteroids” Transplantation (1990) 49(4):697-702; and Lim LC, Koh LP, and Tan P. “Fatal cytokine release syndrome with chimeric anti- CD20 monoclonal antibody rituximab in a 71-year-old patient with chronic lymphocytic leukemia” J. Clin Oncol. (1999) 17(6):1962-3. Also contemplated herein, is the use of an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein to mediate an adverse immune response in patients receiving bi-specific T-cell engagers (BiTE). A bi-specific T-cell engager directs T-cells to target and bind with a specific antigen on the surface of a cancer cell. For example, Blinatumomab (Amgen), a BiTE has recently been approved as a second line therapy in Philadelphia chromosome-negative relapsed or refractory acute lymphoblastic leukemia. Blinatumomab is given by continuous intravenous infusion in 4-week cycles. The use of BiTE agents has been associated with adverse immune responses, including cytokine release syndrome. The most significantly elevated cytokines in the CRS associated with ACT include IL-10, IL-6, and IFN-γ (Klinger et al., Immunopharmacologic response of patients with B-lineage acute lymphoblastic leukemia to continuous infusion of T cell-engaging CD19 / CD3-bispecific BiTE antibody blinatumomab. Blood (2012) 119:6226– 6233). In another embodiment, the disorder is episcleritis, idiopathic episcleritis, anterior episcleritis, or posterior episcleritis. In some embodiments, the disorder is idiopathic anterior uveitis, HLA-B27 related uveitis, herpetic keratouveitis, Posner Schlossman syndrome, Fuch’s heterochromic iridocyclitis, or cytomegalovirus anterior uveitis. In some embodiments, the present disclosure provides a method of treating an IC-MPGN by administering to a subject in need thereof an effective amount of an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein. In some embodiments, the present disclosure provides a method of treating a paroxysmal nocturnal hemoglobinuria (PNH) by administering to a subject in need thereof an effective amount of an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein. In some embodiments, the present disclosure provides a method of treating a hereditary angioedema (HAE) by administering to a subject in need thereof an effective amount of an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein. In some embodiments, the present disclosure provides a method of treating cold agglutinin disease (CAD) by administering to a subject in need thereof an effective amount of an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein. In some embodiments, the present disclosure provides a method of treating atypical hemolytic syndrome (aHUS) by administering to a subject in need thereof an effective amount of an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein. In some embodiments, the present disclosure provides a method of treating age-related macular degeneration (AMD) by administering to a subject in need thereof an effective amount of an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein. In some embodiments, the present disclosure provides a method of treating rheumatoid arthritis by administering to a subject in need thereof an effective amount of an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein. In some embodiments, the present disclosure provides a method of treating multiple sclerosis by administering to a subject in need thereof an effective amount of an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein. In some embodiments, the present disclosure provides a method of treating myasthenia gravis by administering to a subject in need thereof an effective amount of an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein. In some embodiments, the present disclosure provides a method of treating atypical hemolytic uremic syndrome (aHUS) by administering to a subject in need thereof an effective amount of an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein. In another embodiment, the present disclosure provides a method of treating a disorder as described below by administering to a subject in need thereof an effective amount of an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein, including: vitritis, sarcoidosis, syphilis, tuberculosis, or Lyme disease; retinal vasculitis, Eales disease, tuberculosis, syphilis, or toxoplasmosis; neuroretinitis, viral retinitis, or acute retinal necrosis; varicella zoster virus, herpes simplex virus, cytomegalovirus, Epstein-Barr virus, lichen planus, or Dengue-associated disease (e.g., hemorrhagic Dengue Fever); Masquerade syndrome, contact dermatitis, trauma induced inflammation, UVB induced inflammation, eczema, granuloma annulare, or acne. In an additional embodiment, the disorder is selected from: acute myocardial infarction, aneurysm, cardiopulmonary bypass, dilated cardiomyopathy, complement activation during cardiopulmonary bypass operations, coronary artery disease, restenosis following stent placement, or percutaneous transluminal coronary angioplasty (PTCA); antibody-mediated transplant rejection, anaphylactic shock, anaphylaxis, allogenic transplant, humoral and vascular transplant rejection, graft dysfunction, graft-versus-subject disease, Graves' disease, adverse drug reactions, or chronic graft vasculopathy; allergic bronchopulmonary aspergillosis, allergic neuritis, drug allergy, radiation- induced lung injury, eosinophilic pneumonia, radiographic contrast media allergy, bronchiolitis obliterans, or interstitial pneumonia; parkinsonism-dementia complex, sporadic frontotemporal dementia, frontotemporal dementia with Parkinsonism linked to chromosome 17, frontotemporal lobar degeneration, tangle only dementia, cerebral amyloid angiopathy, cerebrovascular disorder, certain forms of frontotemporal dementia, argyrophilic grain dementia, dementia pugilistica, dementia with Lewy Bodies (DLB), or multi- infarct dementia; Creutzfeldt-Jakob disease, multifocal motor neuropathy (MMN), prion protein cerebral amyloid angiopathy, polymyositis, postencephalitic parkinsonism, subacute sclerosing panencephalitis, non-Guamanian motor neuron disease with neurofibrillary tangles, neural regeneration, and diffuse neurofibrillary tangles with calcification. In some embodiments, the disorder is selected from: atopic dermatitis, dermatitis, dermatomyositis bullous pemphigoid, scleroderma, sclerodermatomyositis, psoriatic arthritis, pemphigus vulgaris, Discoid lupus erythematosus, cutaneous lupus, chilblain lupus erythematosus, or lupus erythematosus-lichen planus overlap syndrome; cryoglobulinemic vasculitis, mesenteric / enteric vascular disorder, peripheral vascular disorder, antineutrophil cytoplasm antibody (ANCA)-associated vasculitis (AAV), IL-2 induced vascular leakage syndrome, immune complex vasculitis, angioedema, low platelets (HELLP) syndrome, sickle cell disease, platelet refractoriness, red cell casts, or typical or infectious hemolytic uremic syndrome (tHUS); hematuria, hemorrhagic shock, drug-induced thrombocytopenia, autoimmune hemolytic anemia (AIHA), azotemia, blood vessel and / or lymph vessel inflammation, rotational atherectomy, or delayed hemolytic transfusion reaction; British type amyloid angiopathy, Buerger's disease, bullous pemphigoid, C1q nephropathy, cancer, and catastrophic antiphospholipid syndrome. In some embodiments, the disorder is autoimmune hemolytic anemia, e.g., warm autoimmune hemolytic anemia. In another embodiment, the disorder is selected from: wet (exudative) AMD, dry (non-exudative) AMD, chorioretinal degeneration, choroidal neovascularization (CNV), choroiditis, loss of RPE function, loss of vision (including loss of visual acuity or visual field), loss of vision from AMD, retinal damage in response to light exposure, retinal degeneration, retinal detachment, retinal dysfunction, retinal neovascularization (RNV), retinopathy of prematurity, pathological myopia, or RPE degeneration; pseudophakic bullous keratopathy, symptomatic macular degeneration related disorder, optic nerve degeneration, photoreceptor degeneration, cone degeneration, loss of photoreceptor cells, pars planitis, scleritis, proliferative vitreoretinopathy, or formation of ocular drusen; chronic urticaria, Churg-Strauss syndrome, cold agglutinin disease (CAD), corticobasal degeneration (CBD), cryoglobulinemia, cyclitis, damage of the Bruch's membrane, Degos disease, diabetic angiopathy, elevated liver enzymes, endotoxemia, epidermolysis bullosa, or epidermolysis bullosa acquisita; essential mixed cryoglobulinemia, excessive blood urea nitrogen-BUN, focal segmental glomerulosclerosis, Gerstmann-Straussler- Scheinker disease, giant cell arteritis, gout, Hallervorden-Spatz disease, Hashimoto's thyroiditis, Henoch- Schonlein purpura nephritis, or abnormal urinary sediments; hepatitis, hepatitis A, hepatitis B, hepatitis C or human immunodeficiency virus (HIV), a viral infection more generally, for example selected from Flaviviridae, Retroviruses, Coronaviridae, Poxviridae, Adenoviridae, Herpesviridae, Caliciviridae, Reoviridae, Picornaviridae, Togaviridae, Orthomyxoviridae, Rhabdoviridae, or Hepadnaviridae; Neisseria meningitidis, Shiga toxin E. coli-related hemolytic uremic syndrome (STEC-HUS), hemolytic uremic syndrome (HUS); Streptococcus, and poststreptococcal glomerulonephritis. In a further embodiment, the disorder is selected from: hyperlipidemia, hypertension, hypoalbuminemia, hypovolemic shock, hypocomplementemic urticarial vasculitis syndrome, hypophosphastasis, hypovolemic shock, idiopathic pneumonia syndrome, or idiopathic pulmonary fibrosis; inclusion body myositis, intestinal ischemia, iridocyclitis, iritis, juvenile chronic arthritis, Kawasaki's disease (arteritis), or lipiduria; membranoproliferative glomerulonephritis (MPGN) I, microscopic polyangiitis, mixed cryoglobulinemia, molybdenum cofactor deficiency (MoCD) type A, pancreatitis, panniculitis, Pick's disease, polyarteritis nodosa (PAN), progressive subcortical gliosis, proteinuria, reduced glomerular filtration rate (GFR), or renovascular disorder; multiple organ failure, multiple system atrophy (MSA), myotonic dystrophy, Niemann-Pick disease type C, chronic demyelinating diseases, or progressive supranuclear palsy; spinal cord injury, spinal muscular atrophy, spondyloarthropathies, Reiter's syndrome, spontaneous fetal loss, recurrent fetal loss, pre-eclampsia, synucleinopathy, Takayasu's arteritis, post-partum thyroiditis, thyroiditis, Type I cryoglobulinemia, Type II mixed cryoglobulinemia, Type III mixed cryoglobulinemia, ulcerative colitis, uremia, urticaria, venous gas embolus (VGE), or Wegener's granulomatosis; von Hippel-Lindau disease, histoplasmosis of the eye, hard drusen, soft drusen, pigment clumping, and photoreceptor and / or retinal pigmented epithelia (RPE) loss. In some embodiments, an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein is useful for treating a disorder selected from autoimmune oophoritis, endometriosis, autoimmune orchitis, Ord’s thyroiditis, autoimmune enteropathy, coeliac disease, Hashimoto’s encephalopathy, antiphospholipid syndrome (APLS) (Hughes syndrome), aplastic anemia, autoimmune lymphoproliferative syndrome (Canale-Smith syndrome), autoimmune neutropenia, Evans syndrome, pernicious anemia, pure red cell aplasia, thrombocytopenia, adipose dolorosa (Dercum’s disease), adult onset Still’s disease, ankylosing spondylitis, CREST syndrome, drug-induced lupus, eosinophilic fasciitis (Shulman’s syndrome), Felty syndrome, IgG4-related disease, mixed connective tissue disease (MCTD), palindromic rheumatism (Hench-Rosenberg syndrome), Parry-Romberg syndrome, Parsonage-Turner syndrome, relapsing polychondritis (Meyenburg-Altherr-Uehlinger syndrome), retroperitonial fibrosis, rheumatic fever, Schnitzler syndrome, fibromyalgia, neuromyotonia (Isaac’s disease), paraneoplastic degeneration, autoimmune inner ear disease, Meniere’s disease, interstitial cystitis, autoimmune pancreatitis, zika virus- related disorders, chikungunya virus-related disorders, subacute bacterial endocarditis (SBE), IgA nephropathy, IgA vasculitis, polymyalgia rheumatic, rheumatoid vasculitis, alopecia areata, autoimmune progesterone dermatitis, dermatitis herpetiformis, erythema nodosum, gestational pemphigoid, hidradenitis suppurativa, lichen sclerosus, linear IgA disease (LAD), morphea, myositis, pityriasis lichenoides et varioliformis acuta, vitiligo post-myocardial infarction syndrome (Dressler’s syndrome), post-pericardiotomy syndrome, autoimmune retinopathy, Cogan syndrome, Graves opthalmopathy, ligneous conjunctivitis, Mooren’s ulcer, opsoclonus myoclonus syndrome, optic neuritis, retinocochleocerebral vasculopathy (Susac’s syndrome), sympathetic ophthalmia, Tolosa-Hunt syndrome, interstitial lung disease, antisynthetase syndrome, Addison’s disease, autoimmune polyendocrine syndrome (APS) type I, autoimmune polyendocrine syndrome (APS) type II, autoimmune polyendocrine syndrome (APS) type III, disseminated sclerosis (multiple sclerosis, pattern II), rapidly progressing glomerulonephritis (RPGN), juvenile rheumatoid arthritis, enthesitis-related arthritis, reactive arthritis (Reiter’s syndrome), autoimmune hepatitis or lupoid hepatitis, primary biliary cirrhosis (PBS), primary sclerosing cholangitis, microscopic colitis, latent lupus (undifferentiated connective tissue disease (UCTD)), acute disseminated encephalomyelitis (ADEM), acute motor axonal neuropathy, anti-(R)-N- methyl-D-aspartate receptor encephalitis, Balo concentric sclerosis (Schilders disease), Bickerstaff’s encephalitis, chronic inflammatory demyelinating polyneuropathy, idiopathic inflammatory demyelinating disease, Lambert-Eaton mysathenic syndrome, Oshtoran syndrome, pediatric autoimmune neuropsychiatric disorder associated with streptococcus (PANDAS), progressive inflammatory neuropathy, restless leg syndrome, stiff person syndrome, Sydenhem syndrome, transverse myelitis, lupus vasculitis, leukocytoclastic vasculitis, Microscopic Polyangiitis, polymyositis, and ischemic- reperfusion injury of the eye. Examples of eye disorders that may be treated according to the compositions and methods disclosed herein include amoebic keratitis, fungal keratitis, bacterial keratitis, viral keratitis, onchocercal keratitis, bacterial keratoconjunctivitis, viral keratoconjunctivitis, corneal dystrophic diseases, Fuchs' endothelial dystrophy, Sjogren's syndrome, Stevens-Johnson syndrome, autoimmune dry eye diseases, environmental dry eye diseases, corneal neovascularization diseases, post-corneal transplant rejection prophylaxis and treatment, autoimmune uveitis, infectious uveitis, posterior uveitis (including toxoplasmosis), pan-uveitis, an inflammatory disease of the vitreous or retina, endophthalmitis prophylaxis and treatment, macular edema, macular degeneration, age related macular degeneration, proliferative and non-proliferative diabetic retinopathy, hypertensive retinopathy, an autoimmune disease of the retina, primary and metastatic intraocular melanoma, other intraocular metastatic tumors, open angle glaucoma, closed angle glaucoma, pigmentary glaucoma, and combinations thereof. In a further embodiment, the disorder is selected from glaucoma, diabetic retinopathy, blistering cutaneous diseases (including bullous pemphigoid, pemphigus, and epidermolysis bullosa), ocular cicatricial pemphigoid, uveitis, adult macular degeneration, diabetic retinopathy, retinitis pigmentosa, macular edema, diabetic macular edema, Behcet's uveitis, multifocal choroiditis, Vogt-Koyanagi-Harada syndrome, intermediate uveitis, birdshot retinochorioditis, sympathetic ophthalmia, ocular cicatricial pemphigoid, ocular pemphigus, nonarteritic ischemic optic neuropathy, postoperative inflammation, and retinal vein occlusion, and central retinal vein occlusion (CVRO). In some embodiments, a method for the treatment of an autoimmune blistering disease in a subject is provided that includes the administration of an effective amount of an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein. In some embodiments, a method for the treatment of bullous pemphigoid in a subject is provided that includes the administration of an effective amount of an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein. In some embodiments, the complement mediated disorder is an ophthalmic disease (e.g., early or neovascular age-related macular degeneration and geographic atrophy), an autoimmune disease (e.g., arthritis or rheumatoid arthritis), a respiratory diseases, or a cardiovascular disease. In other embodiments, the compounds of the disclosure are suitable for use in the treatment of diseases and disorders associated with fatty acid metabolism, including obesity and other metabolic disorders. In some embodiments, a method for the treatment of geographic atrophy in a subject is provided that includes the administration of an effective amount of an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein. Disorders that may be treated or prevented by an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein also include, but are not limited to: hereditary angioedema, capillary leak syndrome, hemolytic uremic syndrome (HUS), neurological disorders, Guillain-Barré Syndrome, diseases of the central nervous system and other neurodegenerative conditions, glomerulonephritis (including membrane proliferative glomerulonephritis), SLE nephritis, proliferative nephritis, liver fibrosis, tissue regeneration and neural regeneration, or Barraquer-Simons Syndrome; inflammatory effects of sepsis, systemic inflammatory response syndrome (SIRS), disorders of inappropriate or undesirable complement activation, interleukin-2 induced toxicity during IL-2 therapy, inflammatory disorders, inflammation of autoimmune diseases, systemic lupus erythematosus (SLE), lupus nephritis, arthritis, immune complex disorders and autoimmune diseases, systemic lupus, or lupus erythematosus; ischemia / reperfusion injury (I / R injury), myocardial infarction, myocarditis, post-ischemic reperfusion conditions, balloon angioplasty, atherosclerosis, post-pump syndrome in cardiopulmonary bypass or renal bypass, renal ischemia, mesenteric artery reperfusion after aortic reconstruction, antiphospholipid syndrome, autoimmune heart disease, ischemia-reperfusion injuries, obesity, or diabetes; Alzheimer’s dementia, stroke, schizophrenia, traumatic brain injury, trauma, Parkinson's disease, epilepsy, transplant rejection, prevention of fetal loss, biomaterial reactions (e.g. in hemodialysis, implants), hyperacute allograft rejection, xenograft rejection, transplantation, psoriasis, burn injury, thermal injury including burns or frostbite, or crush injury; asthma, allergy, acute respiratory distress syndrome (ARDS), cystic fibrosis, adult respiratory distress syndrome, dyspnea, hemoptysis, chronic obstructive pulmonary disease (COPD), emphysema, pulmonary embolisms and infarcts, pneumonia, fibrogenic dust diseases, inert dusts and minerals (e.g., silicon, coal dust, beryllium, and asbestos), pulmonary fibrosis, organic dust diseases, chemical injury (due to irritant gases and chemicals, e.g., chlorine, phosgene, sulfur dioxide, hydrogen sulfide, nitrogen dioxide, ammonia, and hydrochloric acid), smoke injury, thermal injury (e.g., burn, freeze), bronchoconstriction, hypersensitivity pneumonitis, parasitic diseases, Goodpasture's Syndrome (anti-glomerular basement membrane nephritis), pulmonary vasculitis, Pauci-immune vasculitis, and immune complex- associated inflammation. In some embodiments, a method for the treatment of sickle cell disease in a subject is provided that includes the administration of an effective amount of an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein. In some embodiments, a method for the treatment of immune thrombocytopenic purpura (ITP), thrombotic thrombocytopenic purpura (TTP), or idiopathic thrombocytopenic purpura (ITP) in a subject is provided that includes the administration of an effective amount of an active compound (e.g., a compound of Formula (I), (I’), or (I”), Table 1) or its salt or composition as described herein. In some embodiments, a method for the treatment of immune thrombocytopenic purpura (ITP). In some embodiments, a method for the treatment of ANCA-vasculitis in a subject is provided that includes the administration of an effective amount of an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein. In some embodiments, a method for the treatment of IgA nephropathy in a subject is provided that includes the administration of an effective amount of an active compound (e.g., a compound of Formula (I), (I’), or (I”), Table 1) or its salt or composition as described herein. In some embodiments, a method for the treatment of rapidly progressing glomerulonephritis (RPGN), in a subject is provided that includes the administration of an effective amount of an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein. In some embodiments, a method for the treatment of lupus nephritis, in a subject is provided that includes the administration of an effective amount of an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein. In some embodiments, a method for the treatment of hemorrhagic dengue fever, in a subject is provided that includes the administration of an effective amount of an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein. In an additional alternative embodiment, an active compound (e.g., a compound of Formula (I), (I’), or (I”), Table 1) or its salt or composition as described herein is used in the treatment of an autoimmune disorder. The complement pathway enhances the ability of antibodies and phagocytic cells to clear microbes and damaged cells from the body. It is part of the innate immune system and in healthy individuals is an essential process. Inhibiting the complement pathway will decrease the body’s immune system response. Therefore, it is an object of the present disclosure to treat autoimmune disorders by administering an effective does of an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein to a subject in need thereof. In some embodiments, the autoimmune disorder is caused by activity of the complement system. In some embodiments the autoimmune disorder is caused by activity of the alternative complement pathway. In some embodiments the autoimmune disorder is caused by activity of the classical complement pathway. In another embodiment the autoimmune disorder is caused by a mechanism of action that is not directly related to the complement system, such as the over-proliferation of T- lymphocytes or the over-production of cytokines. Non-limiting examples of autoimmune disorders include: lupus, allograft rejection, autoimmune thyroid diseases (such as Graves' disease and Hashimoto's thyroiditis), autoimmune uveoretinitis, giant cell arteritis, inflammatory bowel diseases (including Crohn's disease, ulcerative colitis, regional enteritis, granulomatous enteritis, distal ileitis, regional ileitis, and terminal ileitis), diabetes, multiple sclerosis, pernicious anemia, psoriasis, rheumatoid arthritis, sarcoidosis, and scleroderma. In some embodiments, an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein is used in the treatment of lupus. Non-limiting examples of lupus include lupus erythematosus, cutaneous lupus, discoid lupus erythematosus, chilblain lupus erythematosus, and lupus erythematosus-lichen planus overlap syndrome. Lupus erythematosus is a general category of disease that includes both systemic and cutaneous disorders. The systemic form of the disease can have cutaneous as well as systemic manifestations. However, there are also forms of the disease that are only cutaneous without systemic involvement. For example, SLE is an inflammatory disorder of unknown etiology that occurs predominantly in women, and is characterized by articular symptoms, butterfly erythema, recurrent pleurisy, pericarditis, generalized adenopathy, splenomegaly, as well as CNS involvement and progressive renal failure. The sera of most patients (over 98%) contain antinuclear antibodies, including anti-DNA antibodies. High titers of anti-DNA antibodies are essentially specific for SLE. Conventional treatment for this disease has been the administration of corticosteroids or immunosuppressants. There are three forms of cutaneous lupus: chronic cutaneous lupus (also known as discoid lupus erythematosus or DLE), subacute cutaneous lupus, and acute cutaneous lupus. DLE is a disfiguring chronic disorder primarily affecting the skin with sharply circumscribed macules and plaques that display erythema, follicular plugging, scales, telangiectasia, and atrophy. The condition is often precipitated by sun exposure, and the early lesions are erythematous, round scaling papules that are 5 to 10 mm in diameter and display follicular plugging. DLE lesions appear most commonly on the cheeks, nose, scalp, and ears, but they may also be generalized over the upper portion of the trunk, extensor surfaces of the extremities, and on the mucous membranes of the mouth. If left untreated, the central lesion atrophies and leaves a scar. Unlike SLE, antibodies against double-stranded DNA (e.g., DNA-binding test) are almost invariably absent in DLE. Diabetes can refer to either type 1 or type 2 diabetes. In some embodiments an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein is provided at an effective dose to treat a patient with type 1 diabetes. In some embodiments an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein is provided at an effective dose to treat a patient with type 2 diabetes. Type 1 diabetes is an autoimmune disease. An autoimmune disease results when the body's system for fighting infection (the immune system) attacks a part of the body. In the case of diabetes type 1, the pancreas then produces little or no insulin. In some embodiments, the complement-mediated disease or disorder comprises transplant rejection. In some embodiments, the complement-mediated disease or disorder is antibody-mediated transplant rejection. In certain aspects, an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein is used to treat a proliferative disorder, including, but not limited to, cancer. Targeted cancers suitable for administration of an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt described herein include, but are not limited to, estrogen-receptor positive cancer, HER2-negative advanced breast cancer, late-line metastatic breast cancer, liposarcoma, non-small cell lung cancer, liver cancer, ovarian cancer, glioblastoma, refractory solid tumors, retinoblastoma positive breast cancer as well as retinoblastoma positive endometrial, vaginal and ovarian cancers and lung and bronchial cancers, adenocarcinoma of the colon, adenocarcinoma of the rectum, central nervous system germ cell tumors, teratomas, estrogen receptor-negative breast cancer, estrogen receptor-positive breast cancer, familial testicular germ cell tumors, HER2-negative breast cancer, HER2-positive breast cancer, male breast cancer, ovarian immature teratomas, ovarian mature teratoma, ovarian monodermal and highly specialized teratomas, progesterone receptor-negative breast cancer, progesterone receptor-positive breast cancer, recurrent breast cancer, recurrent colon cancer, recurrent extragonadal germ cell tumors, recurrent extragonadal non-seminomatous germ cell tumor, recurrent extragonadal seminomas, recurrent malignant testicular germ cell tumors, recurrent melanomas, recurrent ovarian germ cell tumors, recurrent rectal cancer, stage III extragonadal non-seminomatous germ cell tumors, stage III extragonadal seminomas, stage III malignant testicular germ cell tumors, stage III ovarian germ cell tumors, stage IV breast cancers, stage IV colon cancers, stage IV extragonadal non-seminomatous germ cell tumors, stage IV extragonadal seminoma, stage IV melanomas, stage IV ovarian germ cell tumors, stage IV rectal cancers, testicular immature teratomas, testicular mature teratomas. In particular embodiments, the targeted cancers included estrogen-receptor positive, HER2-negative advanced breast cancer, late-line metastatic breast cancer, liposarcoma, non-small cell lung cancer, liver cancer, ovarian cancer, glioblastoma, refractory solid tumors, retinoblastoma positive breast cancer as well as retinoblastoma positive endometrial, vaginal and ovarian cancers and lung and bronchial cancers, metastatic colorectal cancer, metastatic melanoma with CDK4 mutation or amplification, or cisplatin-refractory, unresectable germ cell tumors, lung cancer, bone cancer, pancreatic cancer, skin cancer, cancer of the head or neck, cutaneous or intraocular melanoma, uterine cancer, ovarian cancer, rectal cancer, cancer of the anal region, stomach cancer, colon cancer, breast cancer, uterine cancer, carcinoma of the fallopian tubes, carcinoma of the endometrium, carcinoma of the cervix, carcinoma of the vagina, carcinoma of the vulva, cancer of the esophagus, cancer of the small intestine, cancer of the endocrine system, cancer of the thyroid gland, cancer of the parathyroid gland, cancer of the adrenal gland, sarcoma of soft tissue, cancer of the urethra, cancer of the penis, prostate cancer, cancer of the bladder, cancer of the kidney or ureter, renal cell carcinoma, carcinoma of the renal pelvis, neoplasms of the central nervous system (CNS), primary CNS lymphoma, spinal axis tumors, brain stem glioma, pituitary adenoma, fibrosarcoma, myxosarcoma, chondrosarcoma, osteosarcoma, chordoma, malignant fibrous histiocytoma, hemangiosarcoma, angiosarcoma, lymphangiosarcoma, Mesothelioma, leiomyosarcoma, rhabdomyosarcoma, squamous cell carcinoma; epidermoid carcinoma, malignant skin adnexal tumors, adenocarcinoma, hepatoma, hepatocellular carcinoma, renal cell carcinoma, hypernephroma, cholangiocarcinoma, transitional cell carcinoma, choriocarcinoma, seminoma, embryonal cell carcinoma, glioma anaplastic; glioblastoma multiforme, neuroblastoma, medulloblastoma, malignant meningioma, malignant schwannoma, neurofibrosarcoma, parathyroid carcinoma, medullary carcinoma of thyroid, bronchial carcinoid, pheochromocytoma, Islet cell carcinoma, malignant carcinoid, malignant paraganglioma, melanoma, Merkel cell neoplasm, cystosarcoma phyllodes, salivary cancers, thymic carcinomas, bladder cancer, and Wilms tumor, a blood disorder or a hematologic malignancy, including, but not limited to, myeloid disorder, lymphoid disorder, leukemia, lymphoma, myelodysplastic syndrome (MDS), myeloproliferative disease (MPD), mast cell disorder, and myeloma (e.g., multiple myeloma), among others, T-cell or NK-cell lymphoma, for example, but not limited to: peripheral T-cell lymphoma; anaplastic large cell lymphoma, for example anaplastic lymphoma kinase (ALK) positive, ALK negative anaplastic large cell lymphoma, or primary cutaneous anaplastic large cell lymphoma; angioimmunoblastic lymphoma; cutaneous T-cell lymphoma, for example mycosis fungoides, Sézary syndrome, primary cutaneous anaplastic large cell lymphoma, primary cutaneous CD30+ T-cell lymphoproliferative disorder; primary cutaneous aggressive epidermotropic CD8+ cytotoxic T-cell lymphoma; primary cutaneous gamma-delta T-cell lymphoma; primary cutaneous small / medium CD4+ T- cell lymphoma, and lymphomatoid papulosis; Adult T-cell Leukemia / Lymphoma (ATLL); blastic NK-cell lymphoma; enteropathy-type T-cell lymphoma; hepatosplenic gamma-delta T-cell lymphoma; lymphoblastic Lymphoma; nasal NK / T-cell lymphomas; treatment-related T-cell lymphomas; for example lymphomas that appear after solid organ or bone marrow transplantation; T-cell prolymphocytic leukemia; T-cell large granular lymphocytic leukemia; chronic lymphoproliferative disorder of NK-cells; aggressive NK cell leukemia; systemic EBV+ T-cell lymphoproliferative disease of childhood (associated with chronic active EBV infection); hydroa vacciniforme-like lymphoma; adult T-cell leukemia / lymphoma; Enteropathy- associated T-cell lymphoma; Hepatosplenic T-cell lymphoma; or Subcutaneous panniculitis-like T-cell lymphoma. In some embodiments, the methods described herein can be used to treat a subject, for example a human, with a lymphoma or lymphocytic or myelocytic proliferation disorder or abnormality. For example, the methods as described herein can be administered to a subject with a Hodgkin Lymphoma or a Non-Hodgkin Lymphoma. For example, the subject can have a Non-Hodgkin Lymphoma such as, but not limited to: an AIDS-Related Lymphoma; Anaplastic Large-Cell Lymphoma; Angioimmunoblastic Lymphoma; Blastic NK-Cell Lymphoma; Burkitt’s Lymphoma; Burkitt-like Lymphoma (Small Non-Cleaved Cell Lymphoma); Chronic Lymphocytic Leukemia / Small Lymphocytic Lymphoma; Cutaneous T-Cell Lymphoma; Diffuse Large B-Cell Lymphoma; Enteropathy-Type T-Cell Lymphoma; Follicular Lymphoma; Hepatosplenic Gamma-Delta T-Cell Lymphoma; Lymphoblastic Lymphoma; Mantle Cell Lymphoma; Marginal Zone Lymphoma; Nasal T-Cell Lymphoma; Pediatric Lymphoma; Peripheral T-Cell Lymphomas; Primary Central Nervous System Lymphoma; T-Cell Leukemias; Transformed Lymphomas; Treatment- Related T-Cell Lymphomas; or Waldenstrom's Macroglobulinemia, a Hodgkin Lymphoma, such as, but not limited to: Nodular Sclerosis Classical Hodgkin’s Lymphoma (CHL); Mixed Cellularity CHL; Lymphocyte-depletion CHL; Lymphocyte-rich CHL; Lymphocyte Predominant Hodgkin Lymphoma; or Nodular Lymphocyte Predominant HL, a specific B-cell lymphoma or proliferative disorder such as, but not limited to: multiple myeloma; Diffuse large B cell lymphoma; Follicular lymphoma; Mucosa-Associated Lymphatic Tissue lymphoma (MALT); Small cell lymphocytic lymphoma; Mediastinal large B cell lymphoma; Nodal marginal zone B cell lymphoma (NMZL); Splenic marginal zone lymphoma (SMZL); Intravascular large B-cell lymphoma; Primary effusion lymphoma; or Lymphomatoid granulomatosis; B- cell prolymphocytic leukemia; Hairy cell leukemia; Splenic lymphoma / leukemia, unclassifiable; Splenic diffuse red pulp small B-cell lymphoma; Hairy cell leukemia-variant; Lymphoplasmacytic lymphoma; Heavy chain diseases, for example, Alpha heavy chain disease, Gamma heavy chain disease, Mu heavy chain disease; Plasma cell myeloma; Solitary plasmacytoma of bone; Extraosseous plasmacytoma; Primary cutaneous follicle center lymphoma; T cell / histiocyte rich large B-cell lymphoma; DLBCL associated with chronic inflammation; Epstein-Barr virus (EBV)+ DLBCL of the elderly; Primary mediastinal (thymic) large B-cell lymphoma; Primary cutaneous DLBCL, leg type; ALK+ large B-cell lymphoma; plasmablastic lymphoma; Large B-cell lymphoma arising in HHV8-associated multicentric; Castleman disease; B-cell lymphoma, unclassifiable, with features intermediate between diffuse large B- cell lymphoma; or B-cell lymphoma, unclassifiable, with features intermediate between diffuse large B-cell lymphoma and classical Hodgkin lymphoma, a leukemia, for example, an acute or chronic leukemia of a lymphocytic or myelogenous origin, such as, but not limited to: acute lymphoblastic leukemia (ALL); Acute myelogenous leukemia (AML); chronic lymphocytic leukemia (CLL); chronic myelogenous leukemia (CML); juvenile myelomonocytic leukemia (JMML); hairy cell leukemia (HCL); acute promyelocytic leukemia (a subtype of AML); large granular lymphocytic leukemia; or adult T-cell chronic leukemia. In some embodiments, the patient has an acute myelogenous leukemia, for example an undifferentiated AML (M0); myeloblastic leukemia (M1; with / without minimal cell maturation); myeloblastic leukemia (M2; with cell maturation); promyelocytic leukemia (M3 or M3 variant [M3V]); myelomonocytic leukemia (M4 or M4 variant with eosinophilia [M4E]); monocytic leukemia (M5); erythroleukemia (M6); or megakaryoblastic leukemia (M7), small cell lung cancer, retinoblastoma, HPV positive malignancies like cervical cancer and certain head and neck cancers, MYC amplified tumors such as Burkitts’ Lymphoma, and triple negative breast cancer; certain classes of sarcoma, certain classes of non-small cell lung carcinoma, certain classes of melanoma, certain classes of pancreatic cancer, certain classes of leukemia, certain classes of lymphoma, certain classes of brain cancer, certain classes of colon cancer, certain classes of prostate cancer, certain classes of ovarian cancer, certain classes of uterine cancer, certain classes of thyroid and other endocrine tissue cancers, certain classes of salivary cancers, certain classes of thymic carcinomas, certain classes of kidney cancers, certain classes of bladder cancers, and certain classes of testicular cancers. In certain aspects, an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt as described herein can be used to preserve or prevent damage to an organ or blood product. For example, an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt described herein can be used to prevent damage to an organ, tissue, cell product, or blood product, that has been harvested for transplantation. In some embodiments, the organ is the heart, kidney, pancreas, lung, liver, or intestine. In some embodiments, the tissue is derived from the cornea, bone, tendon, muscle, heart valve, nerve, artery or vein, or the skin. In some embodiments, the blood product is whole blood, plasma, red blood cells or reticulocytes. In some embodiments, an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein prevents or delays the onset of at least one symptom of a complement-mediated disease or disorder in an individual. In some embodiments, an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein reduces or eliminates at least one symptom of a complement-mediated disease or disorder in an individual. Examples of symptoms include, but are not limited to, symptoms associated with autoimmune disease, cancer, hematological disease, infectious disease, inflammatory disease, ischemia-reperfusion injury, neurodegenerative disease, neurodegenerative disorder, renal disease, transplant rejection, ocular disease, vascular disease, or a vasculitis disorder. The symptom can be a neurological symptom, for example, impaired cognitive function, memory impairment, loss of motor function, etc. The symptom can also be the activity of C1s protein in a cell, tissue, or fluid of an individual. The symptom can also be the extent of complement activation in a cell, tissue, or fluid of an individual. In some embodiments, administering an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein to an individual modulates complement activation in a cell, tissue, or fluid of an individual. In some embodiments, administration of an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein to an individual inhibits complement activation in a cell, tissue, or fluid of an individual. For example, in some embodiments, an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein, when administered in one or more doses as monotherapy or in combination therapy to an individual having a complement-mediated disease or disorder, inhibits complement activation in the individual by at least about 10%, at least about 15%, at least about 20%, at least about 25%, at least about 30%, at least about 40%, at least about 50%, at least about 60%, at least about 70%, at least about 80%, at least about 90%, or more than 90%, compared to complement activation in the individual before treatment with the compounds described herein. In some embodiments, an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein reduces C3 deposition onto red blood cells; for example, in some embodiments, an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein reduces deposition of C3b, iC3b, etc., onto RBCs. In some embodiments, an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein inhibits complement-mediated red blood cell lysis. In some embodiments, an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein reduces C3 deposition onto platelets; for example, in some embodiments, an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein reduces deposition of C3b, iC3b, etc., onto platelets. In some embodiments, administering an active compound (e.g., a compound of Formula (I), (I’), or (I”), Table 1) or its salt or composition as described herein results in an outcome selected from the group consisting of: (a) a reduction in complement activation; (b) an improvement in cognitive function; (c) a reduction in neuron loss; (d) a reduction in phospho-Tau levels in neurons; (e) a reduction in glial cell activation; (f) a reduction in lymphocyte infiltration; (g) a reduction in macrophage infiltration; (h) a reduction in antibody deposition, (i) a reduction in glial cell loss; (j) a reduction in oligodendrocyte loss; (k) a reduction in dendritic cell infiltration; (l) a reduction in neutrophil infiltration; (m) a reduction in red blood cell lysis; (n) a reduction in red blood cell phagocytosis; (o) a reduction in platelet phagocytosis; (p) a reduction in platelet lysis; (q) an improvement in transplant graft survival; (r) a reduction in macrophage mediated phagocytosis; (s) an improvement in vision; (t) an improvement in motor control; (u) an improvement in thrombus formation; (v) an improvement in clotting; (w) an improvement in kidney function; (x) a reduction in antibody mediated complement activation; (y) a reduction in autoantibody mediated complement activation; (z) an improvement in anemia; (aa) reduction of demyelination; (ab) reduction of eosinophilia; (ac) a reduction of C3 deposition on red blood cells (e.g., a reduction of deposition of C3b, iC3b, etc., onto RBCs); and (ad) a reduction in C3 deposition on platelets (e.g., a reduction of deposition of C3b, iC3b, etc., onto platelets); and (ae) a reduction of anaphylatoxin toxin production; (af) a reduction in autoantibody mediated blister formation; (ag) a reduction in autoantibody induced pruritis; (ah) a reduction in autoantibody induced erythematosus; (ai) a reduction in autoantibody mediated skin erosion; (aj) a reduction in red blood cell destruction due to transfusion reactions; (ak) a reduction in red blood cell lysis due to alloantibodies; (al) a reduction in hemolysis due to transfusion reactions; (am) a reduction in allo-antibody mediated platelet lysis; (an) a reduction in platelet lysis due to transfusion reactions; (ao) a reduction in mast cell activation; (ap) a reduction in mast cell histamine release; (aq) a reduction in vascular permeability; (ar) a reduction in edema; (as) a reduction in complement deposition on transplant graft endothelium; (at) a reduction of anaphylatoxin generation in transplant graft endothelium; (au) a reduction in the separation of the dermal-epidermal junction; (av) a reduction in the generation of anaphylatoxins in the dermal-epidermal junction; (aw) a reduction in alloantibody mediated complement activation in transplant graft endothelium; (ax) a reduction in antibody mediated loss of the neuromuscular junction; (ay) a reduction in complement activation at the neuromuscular junction; (az) a reduction in anaphylatoxin generation at the neuromuscular junction; (ba) a reduction in complement deposition at the neuromuscular junction; (bb) a reduction in paralysis; (bc) a reduction in numbness; (bd) increased bladder control; (be) increased bowel control; (bf) a reduction in mortality associated with autoantibodies; and (bg) a reduction in morbidity associated with autoantibodies. In some embodiments, an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein, when administered in one or more doses to an individual having a complement-mediated disease or disorder, is effective to achieve a reduction of at least about 10%, at least about 15%, at least about 20%, at least about 25%, at least about 30%, at least about 40%, at least about 50%, at least about 60%, at least about 70%, at least about 80%, at least about 90%, or more than 90%, of one or more of the following outcomes: (a) complement activation; (b) decline in cognitive function; (c) neuron loss; (d) phospho-Tau levels in neurons; (e) glial cell activation; (f) lymphocyte infiltration; (g) macrophage infiltration; (h) antibody deposition, (i) glial cell loss; (j) oligodendrocyte loss; (k) dendritic cell infiltration; (l) neutrophil infiltration; (m) red blood cell lysis; (n) red blood cell phagocytosis; (o) platelet phagocytosis; (p) platelet lysis; (q) transplant graft rejection; I macrophage mediated phagocytosis; (s) vision loss; (t) antibody mediated complement activation; (u) autoantibody mediated complement activation; (v) demyelination; (w) eosinophilia; compared to the level or degree of the outcome in the individual before treatment with the active compound or its salt. In some embodiments, an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein, when administered in one or more doses to an individual having a complement-mediated disease or disorder, is effective to achieve an improvement of at least about 10%, at least about 15%, at least about 20%, at least about 25%, at least about 30%, at least about 40%, at least about 50%, at least about 60%, at least about 70%, at least about 80%, at least about 90%, or more than 90%, of one or more of the following outcomes: a) cognitive function; b) transplant graft survival; c) vision; d) motor control; e) thrombus formation; f) clotting; g) kidney function; and h) hematocrit (red blood cell count), compared to the level or degree of the outcome in the individual before treatment with the active compound or its salt. In some embodiments, administering an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein to an individual reduces complement activation in the individual. For example, in some embodiments, an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein, when administered in one or more doses to an individual having a complement-mediated disease or disorder, reduces complement activation in the individual by at least about 10%, at least about 15%, at least about 20%, at least about 25%, at least about 30%, at least about 40%, at least about 50%, at least about 60%, at least about 70%, at least about 80%, at least about 90%, or more than 90%, compared to complement activation in the individual before treatment with the active compound or its salt. In some embodiments, administering an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein improves cognitive function in the individual. For example, in some embodiments, an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) described herein, when administered in one or more doses to an individual having a complement-mediated disease or disorder, improves cognitive function in the individual by at least about 10%, at least about 15%, at least about 20%, at least about 25%, at least about 30%, at least about 40%, at least about 50%, at least about 60%, at least about 70%, at least about 80%, at least about 90%, or more than 90%, compared to the cognitive function in the individual before treatment with the active compound or its salt. In some embodiments, administering an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein reduces the rate of decline in cognitive function in the individual. For example, in some embodiments, an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt, when administered in one or more doses to an individual having a complement-mediated disease or disorder, reduces the rate of decline of cognitive function in the individual by at least about 10%, at least about 15%, at least about 20%, at least about 25%, at least about 30%, at least about 40%, at least about 50%, at least about 60%, at least about 70%, at least about 80%, at least about 90%, or more than 90%, compared to the rate of decline in cognitive function in the individual before treatment with the active compound or its salt. In some embodiments, administering an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein to an individual reduces neuron loss in the individual. For example, in some embodiments, an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt, when administered in one or more doses to an individual having a complement-mediated disease or disorder, reduces neuron loss in the individual by at least about 10%, at least about 15%, at least about 20%, at least about 25%, at least about 30%, at least about 40%, at least about 50%, at least about 60%, at least about 70%, at least about 80%, at least about 90%, or more than 90%, compared to neuron loss in the individual before treatment with the active compound or its salt. In some embodiments, administering an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein to an individual reduces phospho-Tau levels in the individual. For example, in some embodiments, an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt, when administered in one or more doses to an individual having a complement-mediated disease or disorder, reduces phospho-Tau in the individual by at least about 10%, at least about 15%, at least about 20%, at least about 25%, at least about 30%, at least about 40%, at least about 50%, at least about 60%, at least about 70%, at least about 80%, at least about 90%, or more than 90%, compared to the phospho- Tau level in the individual before treatment with the active compound or its salt. In some embodiments, administering an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein to an individual reduces glial cell activation in the individual. For example, in some embodiments, an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt, when administered in one or more doses to an individual having a complement-mediated disease or disorder, reduces glial activation in the individual by at least about 10%, at least about 15%, at least about 20%, at least about 25%, at least about 30%, at least about 40%, at least about 50%, at least about 60%, at least about 70%, at least about 80%, at least about 90%, or more than 90%, compared to glial cell activation in the individual before treatment with the active compound or its salt. In some embodiments, the glial cells are astrocytes or microglia. In some embodiments, administering an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein to an individual reduces lymphocyte infiltration in the individual. For example, in some embodiments, an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt, when administered in one or more doses to an individual having a complement-mediated disease or disorder, reduces lymphocyte infiltration in the individual by at least about 10%, at least about 15%, at least about 20%, at least about 25%, at least about 30%, at least about 40%, at least about 50%, at least about 60%, at least about 70%, at least about 80%, at least about 90%, or more than 90%, compared to lymphocyte infiltration in the individual before treatment with the active compound or its salt. In some embodiments, administering an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein to an individual reduces macrophage infiltration in the individual. For example, in some embodiments, an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt, when administered in one or more doses to an individual having a complement-mediated disease or disorder, reduces macrophage infiltration in the individual by at least about 10%, at least about 15%, at least about 20%, at least about 25%, at least about 30%, at least about 40%, at least about 50%, at least about 60%, at least about 70%, at least about 80%, at least about 90%, or more than 90%, compared to macrophage infiltration in the individual before treatment with the active compound or its salt. In some embodiments, administering an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein to an individual reduces antibody deposition in the individual. For example, in some embodiments, an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt, when administered in one or more doses to an individual having a complement-mediated disease or disorder, reduces antibody deposition in the individual by at least about 10%, at least about 15%, at least about 20%, at least about 25%, at least about 30%, at least about 40%, at least about 50%, at least about 60%, at least about 70%, at least about 80%, at least about 90%, or more than 90%, compared to antibody deposition in the individual before treatment with the active compound or its salt. In some embodiments, administering an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt or composition as described herein to an individual reduces anaphylatoxin (e.g., C3a, C4a, C5a) production in an individual. For example, in some embodiments, an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt, when administered in one or more doses to an individual having a complement-mediated disease or disorder, reduces anaphylatoxin production in the individual by at least about 10%, at least about 15%, at least about 20%, at least about 25%, at least about 30%, at least about 40%, at least about 50%, at least about 60%, at least about 70%, at least about 80%, at least about 90%, or more than 90%, compared to the level of anaphylatoxin production in the individual before treatment with the active compound or its salt. The present disclosure provides a use of an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt of the present disclosure or a pharmaceutical composition comprising an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt of the present disclosure and a pharmaceutically acceptable excipient to treat an individual having a complement-mediated disease or disorder. In some embodiments, the present disclosure provides a use of an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt of the present disclosure to treat an individual having a complement-mediated disease or disorder. In some embodiments, the present disclosure provides a use of a pharmaceutical composition comprising an active compound (e.g., a compound of Formula (I), (I’), (I”), (II), (III), (IV), (V), (VI), or (VII), or Table 1) or its salt of the present disclosure and a pharmaceutically acceptable excipient to treat an individual having a complement-mediated disease or disorder. Examples The following examples are merely illustrative and should not be construed as limiting the scope of this disclosure in any way as many variations and equivalents will become apparent to those skilled in the art upon reading the present disclosure. The contents of all references, patents, and patent applications cited throughout this application are expressly incorporated herein by reference. Example 1. Non-Limiting Synthetic Examples of Compounds of the Present Disclosure The below schemes are non-limiting examples of methods to make compounds of the present disclosure. The skilled artisan will recognize that there are various modifications that can be performed to make analogs or prepare compounds in other ways. Abbreviations

[0002] GENERAL METHODS All nonaqueous reactions were performed under an atmosphere of dry argon or nitrogen gas using anhydrous solvents. The progress of reactions and the purity of target compounds were determined using one of the two liquid chromatography (LC) methods A or B disclosed herein. The structure of starting materials, intermediates, and final products was confirmed by standard analytical techniques, including NMR spectroscopy and mass spectrometry. LC Method A Instrument: Waters Acquity Ultra Performance LC Column: ACQUITY UPLC BEH C182.1 ´ 50 mm, 1.7 mm Column Temperature: 40 °C Mobile Phase: Solvent A: H2O + 0.05% FA; Solvent B: CH3CN + 0.05% FA Flow Rate: 0.8 mL / min Gradient: 0.24 min @ 15% B, 3.5 min gradient (15-85% B), then 0.5 min @ 85% B. Detection: UV (210-410 nm) and MS (SQ in ES+ mode) Scheme 1. Synthesis of (6S)-3-(dibenzofuran-2-ylmethylamino)-4-oxo-N-(1H-pyrrolo[3,2-c]pyridin- 2-ylmethyl)-7,8-dihydro-6H-pyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 1) A 250 mL round bottom flask was charged with tert-butyl (S)-5-oxopyrrolidine-2-carboxylate (4000 mg, 21.60 mmol), toluene (120 mL), and Lawesson's Reagent (4000 mg, 11.61 mmol) and heated to 70 ˚C for 30 minutes. Afterwards, the mixture was allowed to cool to room temperature, concentrated in vacuo, and adsorbed onto Celite. Flash chromatography (RediSep Rf Gold silica, 120g, 0-10% MeOH in dichloromethane) afforded the title compound (3.422 g, 17.00 mmol, 78.72% yield) as a white solid. LC / MS: (ESI+) m / z = 202 [M+H]+. Step 2: tert-Butyl (2S)-5-methylsulfanyl-3,4-dihydro-2H-pyrrole-2-carboxylate A 250 mL round bottom flask was charged with tert-butyl (2S)-5-thioxopyrrolidine-2-carboxylate (3.422g, 17.00 mmol), 2-methyltetrahydrofuran (60 mL), and iodomethane (4.2 mL, 67 mmol) at room temperature, and the mixture was stirred for 4 hours. Afterwards, the mixture was concentrated in vacuo. The crude oil was then taken up in DCM (100 mL) and washed with saturated NaHCO3solution (100 mL). The aqueous layer was then extracted with DCM (3 x 50 mL). The combined organic extracts were washed with brine (100 mL), dried over anhydrous Na2SO4, and concentrated in vacuo to afford the title compound (3.335 g, 15.49 mmol, 91.11% yield) as an orange oil. LC / MS: (ESI+) m / z = 216 [M+H]+. Step 3: tert-Butyl (2S)-5-amino-3,4-dihydro-2H-pyrrole-2-carboxylate A 100 mL round bottom was charged with tert-butyl (2S)-5-methylsulfanyl-3,4-dihydro-2H-pyrrole- 2-carboxylate (4.20 g, 19.5 mmol), MeOH (40 mL), and NH4Cl (1300 mg, 24.30 mmol) at room temperature, and the mixture was heated to reflux for 2 hours. Afterwards, the mixture was allowed to cool to room temperature and concentrated in vacuo. The residue was taken up in DCM (75 mL), filtered, and concentrated in vacuo. The crude product was then triturated with hexanes and filtered. The resulting light-yellow solid was then added to a solution of saturated K2CO3(100 mL) and DCM (100 mL). The aqueous layer was then further extracted with DCM (3 x 25 mL). The combined organic extracts were then dried over Na2SO4, filtered, and concentrated in vacuo to afford the title compound (2.45 g, 13.3 mmol, 68.2% yield) that was carried forward without further purification. LC / MS: (ESI+) m / z = 185 [M+H]+. Step 4: 6-(tert-Butyl) 3-methyl (S)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-3,6-dicarboxylate A 150 mL round bottom flask was charged with dimethyl 2-(methoxymethylene)propanedioate (2.50 g, 14.4 mmol) and MeOH (30 mL) and cooled to -10 ˚C in an acetone / ice bath. Tert-butyl (2S)-5- amino-3,4-dihydro-2H-pyrrole-2-carboxylate (2.65 g, 14.4 mmol) in MeOH (30 mL) was then added dropwise, and the resulting solution was allowed to warm to room temperature and stir overnight. Afterwards, the mixture was concentrated in vacuo and subjected to flash chromatography (RediSep Rf Gold silica, 40g, 0-5% MeOH in DCM) to afford the title compound (2205 mg, 7.492 mmol, 52.1% yield) as an orange solid.1H NMR (400 MHz, CDCl3) δ 8.67 (s, 1H), 5.01 (dd, J = 9.8, 2.7 Hz, 1H), 3.88 (s, 3H), 3.35 – 3.21 (m, 1H), 3.19 – 3.07 (m, 1H), 2.60 – 2.49 (m, 1H), 2.35 – 2.24 (m, 1H), 1.48 (s, 9H). LC / MS: (ESI+) m / z = 295 [M+H]+. Step 5: (6S)-6-tert-Butoxycarbonyl-4-oxo-7,8-dihydro-6H-pyrrolo[1,2-a]pyrimidine-3-carboxylic acid A 100 mL round bottom was charged with 6-(tert-butyl) 3-methyl (S)-4-oxo-4,6,7,8- tetrahydropyrrolo[1,2-a]pyrimidine-3,6-dicarboxylate (2205 mg, 7.492 mmol) and MeOH (40 mL), followed by cooling to 0 ˚C in a brine / ice bath. LiOH.H2O (325 mg, 7.563 mmol) in water (8 mL) was added dropwise, and the resulting solution was allowed to slowly warm to room temperature and stir overnight. Afterwards, the mixture was concentrated in vacuo and diluted in water (15 mL). The aqueous mixture was washed with MTBE (10 mL), and the organic layer was discarded. The pH of the aqueous layer was then adjusted to pH 2 with 1M HCl. The aqueous layer was then extracted with DCM (3 x 50 mL). The organic layer was then dried over Na2SO4, filtered, and concentrated in vacuo to afford the title compound (1425 mg, 5.084 mmol, 67.85% yield) as a light-orange solid. LC / MS: (ESI+) m / z = 281 [M+H]+. Step 6: tert-Butyl (6S)-3-amino-4-oxo-7,8-dihydro-6H-pyrrolo[1,2-a]pyrimidine-6-carboxylate A 100 mL round bottom flask was charged with (6S)-6-tert-butoxycarbonyl-4-oxo-7,8-dihydro-6H- pyrrolo[1,2-a]pyrimidine-3-carboxylic acid (750 mg, 2.676 mmol), 1,4-dioxane (15 mL), TEA (0.400 mL, 2.87 mmol), and DPPA (0.600 mL, 2.78 mmol), and the mixture was heated to reflux for 1 hour. Water (0.150 mL, 8.33 mmol) was then added, and the resulting mixture was refluxed for an additional 30 minutes. Afterwards, the mixture was allowed to cool to room temperature and concentrated in vacuo. Flash chromatography (Redisep Rf Gold silica, 40g, 0-10% MeOH in DCM) afforded the title compound (352 mg, 1.4008 mmol, 52.35% yield) as a light-yellow solid.1H NMR (400 MHz, CDCl3) δ 7.34 (s, 1H), 4.96 (dd, J = 9.6, 2.9 Hz, 1H), 3.83 (s, 2H), 3.22 – 3.05 (m, 1H), 3.04 – 2.84 (m, 1H), 2.65 – 2.43 (m, 1H), 2.38 – 2.18 (m, 1H), 1.48 (s, 9H). LC / MS: (ESI+) m / z = 252 [M+H]+. Step 7: tert-Butyl (6S)-3-(dibenzofuran-2-ylmethylamino)-4-oxo-7,8-dihydro-6H-pyrrolo[1,2-a]pyrimidine-6- carboxylate A 100 mL round bottom flask was charged with tert-butyl (6S)-3-amino-4-oxo-7,8-dihydro-6H- pyrrolo[1,2-a]pyrimidine-6-carboxylate (345 mg, 1.3730 mmol), dibenzofuran-2-carbaldehyde (275 mg, 1.402 mmol), DCE (5 mL), and AcOH (0.080 mL, 1.4 mmol) at room temperature under nitrogen. The mixture was allowed to stir for 30 minutes, and sodium triacetoxyborohydride (450 mg, 2.1232 mmol) was added to the mixture. The reaction mixture was allowed to stir overnight at room temperature. Afterwards, the mixture was diluted with DCM (25 mL), washed with saturated NaHCO3solution (50 mL) and brine (50 mL), dried over Na2SO4, filtered, and concentrated in vacuo. Flash chromatography (RediSep Rf Gold silica, 12g, 0-10% MeOH in DCM) afforded the title compound (472 mg, 1.094 mmol, 79.67% yield) as a yellow solid.1H NMR (400 MHz, CDCl3) δ 7.96 – 7.88 (m, 2H), 7.59 – 7.49 (m, 2H), 7.47 – 7.39 (m, 2H), 7.37 – 7.30 (m, 1H), 7.05 (s, 1H), 4.96 (td, J = 9.2, 4.2 Hz, 2H), 4.43 (d, J = 5.3 Hz, 2H), 3.08 (dt, J = 17.0, 9.4 Hz, 1H), 2.93 (ddd, J = 17.1, 9.4, 3.4 Hz, 1H), 2.50 (dq, J = 13.4, 9.5 Hz, 1H), 2.33 – 2.21 (m, 1H), 1.49 (s, 9H). LC / MS: (ESI+) m / z = 432 [M+H]+. Step 8: (6S)-3-(Dibenzofuran-2-ylmethylamino)-4-oxo-7,8-dihydro-6H-pyrrolo[1,2-a]pyrimidine-6- carboxylic acid A 20 mL vial was charged with tert-butyl (6S)-3-(dibenzofuran-2-ylmethylamino)-4-oxo-7,8- dihydro-6H-pyrrolo[1,2-a]pyrimidine-6-carboxylate (460 mg, 1.066 mmol) and DCM (3 mL), and the mixture was cooled to 0 ˚C in a brine / ice bath. Trifluoroacetic acid (2.5 mL, 33 mmol) was added dropwise, and the resulting mixture was allowed to warm to room temperature and stir for 3 hours. Afterwards, the mixture was concentrated in vacuo to afford the title compound as a brown solid, which was directly carried forward to the next reaction. LC / MS: (ESI+) m / z = 376 [M+H]+. Step 9: (6S)-3-(Dibenzofuran-2-ylmethylamino)-4-oxo-N-(1H-pyrrolo[3,2-c]pyridin-2-ylmethyl)-7,8-dihydro- 6H-pyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 1) A 20 mL vial was charged with 1H-pyrrolo[3,2-c]pyridin-2-ylmethanamine;dihydrochloride (75 mg, 0.34075 mmol), (6S)-3-(dibenzofuran-2-ylmethylamino)-4-oxo-7,8-dihydro-6H-pyrrolo[1,2-a]pyrimidine-6- carboxylic acid (100 mg, 0.2664 mmol), DMF (3 mL), and TEa (0.200 mL, 1.51 mmol), and the mixture was cooled to 0 ˚C in a brine / ice bath. [Dimethylamino(triazolo[4,5-b]pyridin-3-yloxy)methylene]-dimethyl- ammonium;hexafluorophosphate (150 mg, 0.39450 mmol) was then added, and the resulting mixture was stirred at 0 ˚C for 30 minutes. Afterwards, the mixture was diluted in EtOAc (25 mL), washed with brine (100 mL), dried over Na2SO4, filtered, and concentrated in vacuo. Flash chromatography (RediSep Rf Gold silica, 12g, 0-50% MeOH in DCM) followed by prep-HPLC (C18, 150 x 21 mm, 5 μM, 5-50% MeCN [0.1% FA] in water [0.1% FA]) and lyophilization afforded Compound 1 (16 mg, 0.03171 mmol, 11.91% yield) as a white solid.1H NMR (400 MHz, CDCl3) δ 9.61 (s, 1H), 8.80 (s, 1H), 8.22 (d, J = 5.9 Hz, 1H), 8.02 – 7.88 (m, 3H), 7.55 (dd, J = 12.8, 8.3 Hz, 2H), 7.51 – 7.39 (m, 2H), 7.39 – 7.31 (m, 1H), 7.21 (d, J = 5.8 Hz, 1H), 7.13 (s, 1H), 6.39 (s, 1H), 5.10 (d, J = 8.8 Hz, 1H), 4.89 (s, 1H), 4.63 (dd, J = 15.4, 6.5 Hz, 1H), 4.50 (dd, J = 15.4, 5.3 Hz, 1H), 4.42 (s, 2H), 3.32 – 3.18 (m, 1H), 3.04 – 2.89 (m, 1H), 2.82 – 2.69 (m, 1H), 2.46 – 2.33 (m, 1H). LC / MS: (ESI+) m / z = 505 [M+H]+. RT (Method A): 1.31 min. Compound 2 was prepared according to the procedures set forth above, using tert-butyl (R)-5- oxopyrrolidine-2-carboxylate as the starting material in Step 1.1H NMR (400 MHz, MeOD) δ 8.85 (s, 1H), 8.48 (s, 1H), 8.17 (d, J = 6.3 Hz, 1H), 8.03 (s, 1H), 8.00 – 7.90 (m, 1H), 7.65 (d, J = 6.3 Hz, 1H), 7.62 – 7.43 (m, 5H), 7.33 (t, J = 7.4 Hz, 1H), 7.04 (s, 1H), 6.79 (s, 1H), 5.13 (dd, J = 9.2, 3.7 Hz, 1H), 4.76 (s, 1H), 4.59 (d, J = 16.1 Hz, 1H), 4.52 (s, 2H), 3.18 – 3.07 (m, 1H), 3.02 – 2.91 (m, 1H), 2.66 – 2.53 (m, 1H), 2.34 – 2.22 (m, 1H). LC / MS: (ESI+) m / z = 505 [M+H]+. RT (Method A): 1.21 min. Scheme 2. Synthesis of (R)-N-((1H-Pyrrolo[3,2-c]pyridin-2-yl)methyl)-6-((1-(dibenzo[b,d]furan-2- yl)ethyl)amino)-5-oxo-5H-thiazolo[3,2-a]pyrimidine-3-carboxamide (Compound 3) To a pre-heated phosphoric acid solution (10 g, 102.0 mmol) (115% H3PO4) at 100 °C was added methyl 2-aminothiazole-4-carboxylate (500 mg, 3.16 mmol). To this viscous solution was added methyl 3,3-dimethoxypropanoate (0.9 mL, 6 mmol) in two equal portions, 3 hours apart. The reaction was stirred for 72 hours at 100 °C to give a dark-brown solution. The mixture was diluted with water and basified with 1N NaOH to pH 9. The mixture was extracted with EtOAc (3 x 20 mL). The combined organic layers were washed with saturated brine, dried over Na2SO4, filtered, and concentrated. The residue was purified by silica gel column chromatography (0 to 5% MeOH in DCM) to give the title compound (49 mg, 8% yield) as a light-yellow oil. LC / MS (ESI) m / z: 211 (M+H)+. Step 2: Methyl 6-bromo-5-oxo-5H-thiazolo[3,2-a]pyrimidine-3-carboxylate To a solution of methyl 5-oxo-5H-thiazolo[3,2-a]pyrimidine-3-carboxylate (180 mg, 0.6 mmol) in MeCN (5 mL) was added NBS (160 mg, 0.9 mmol) at room temperature. The reaction mixture was stirred for 1 hour and concentrated. The mixture was then diluted with saturated Na2S2O3and extracted with EtOAc (3 x 20 mL). The combined organic layers were washed with brine, dried over Na2SO4, filtered, and concentrated. The residue was purified on silica gel column chromatography (0 to 60% EtOAc in hexanes) to give the title compound (208 mg, >100% yield) as a yellow solid. LC / MS (ESI) m / z: 289, 291 (M+H)+. Step 3: Methyl (R)-6-((1-(dibenzo[b,d]furan-2-yl)ethyl)amino)-5-oxo-5H-thiazolo[3,2-a]pyrimidine-3- carboxylate A mixture of methyl 6-bromo-5-oxo-5H-thiazolo[3,2-a]pyrimidine-3-carboxylate (80 mg, 0.28 mmol), (1R)-1-dibenzofuran-2-ylethanamine (120 mg, 0.57 mmol), Cs2CO3(200 mg, 0.62 mmol), Pd2(dba)3 (26 mg, 0.028 mmol), and XantPhos (48 mg, 0.083 mmol) in 1,4-dioxane (4 mL) (pre-sparged with nitrogen for 20 minutes before use) was sparged with nitrogen for 5 minutes. The mixture was heated to 105 °C for 2 hours. The mixture was diluted with EtOAc (10 mL) and filtered over a Celite pad. The filtrate was concentrated and diluted with water / MTBE. The solid was removed. The filtrate was extracted with EtOAc (3 x 10 mL). The combined organic layers were washed with brine, dried over Na2SO4, filtered, and concentrated. The reside was purified on silica gel column chromatography (0 to 80% EtOAc in hexanes) to give the title compound (17 mg, 12% yield) as a yellow foamy solid. LC / MS (ESI) m / z: 420 (M+H)+. Step 4: (R)-6-((1-(Dibenzo[b,d]furan-2-yl)ethyl)amino)-5-oxo-5H-thiazolo[3,2-a]pyrimidine-3-carboxylic acid To a solution of methyl (R)-6-((1-(dibenzo[b,d]furan-2-yl)ethyl)amino)-5-oxo-5H-thiazolo[3,2- a]pyrimidine-3-carboxylate (12 mg, 0.029 mmol) in MeOH (0.5 mL, 10 mmol), water (0.5 mL, 30 mmol), and THF (0.5 mL, 6 mmol) was added LiOH.H2O (1.5 mg, 0.063 mmol) at room temperature, and the reaction mixture was stirred for 1 hour. The mixture was basified with 1N NaOH (0.2 mL) and extracted with EtOAc (10 mL). The organic layer was discarded, and the aqueous layer was acidified to pH 3-4 with 1N HCl and extracted with EtOAc (3 x 20 mL). The combined organic layers were washed with brine, dried over Na2SO4, filtered, and concentrated to give (the title compound (10 mg, 60% yield) as a yellow wax. LC / MS (ESI) m / z: 406 (M+H)+. Step 5: (R)-N-((1H-Pyrrolo[3,2-c]pyridin-2-yl)methyl)-6-((1-(dibenzo[b,d]furan-2-yl)ethyl)amino)-5-oxo-5H- thiazolo[3,2-a]pyrimidine-3-carboxamide (Compound 3) A suspension of (R)-6-((1-(dibenzo[b,d]furan-2-yl)ethyl)amino)-5-oxo-5H-thiazolo[3,2- a]pyrimidine-3-carboxylic acid (10 mg, 0.017 mmol), (1H-pyrrolo[3,2-c]pyridin-2-yl)methanamine dihydrochloride (4 mg, 0.018 mmol), and 50% T3P in EtOAc (0.022 mL, 0.074 mmol) in DMF (2 mL) was cooled with ice bath. After 5 minutes, DIPEA (0.01 mL, 0.06 mmol) was added. After stirring for 40 minutes. Saturated aq. NaHCO3(1 mL) was added, and the resulting mixture was diluted with DMSO (2 mL). After filtration through a Celite pad, the filtrate was purified by ACCQ prep-HPLC (0 to 100% MeCN in H2O (with 0.05% HCOOH)) to give Compound 3 (3.2 mg, 35% yield) as an off-white solid.1H-NMR (400 MHz, MeOD) δ 8.92 (s, 1H), 8.31 (s, 2H), 8.20 (s, 1H), 8.04 – 7.73 (m, 3H), 7.61 – 7.32 (m, 4H), 7.22 (t, J = 7.5 Hz, 1H), 7.02 (s, 1H), 6.97 (s, 1H), 4.58 (d, J = 6.7 Hz, 1H), 1.57 (d, J = 6.7 Hz, 3H). LC / MS (ESI) m / z: 535 (M+H)+. RT (Method A): 1.61 min. Scheme 3. Synthesis of (6S)-4-oxo-3-[(5-phenylthiophene-2-carbonyl)amino]-N-(1H-pyrrolo[3,2- c]pyridin-2-ylmethyl)-7,8-dihydro-6H-pyrrolo[1,2-a]pyrimidine-6-carboxamide formic acid salt (Compound 4) Step 1: tert-Butyl (6S)-4-oxo-3-[(5-phenylthiophene-2-carbonyl)amino]-7,8-dihydro-6H-pyrrolo[1,2- a]pyrimidine-6-carboxylate A 20 mL vial was charged with tert-butyl (6S)-3-amino-4-oxo-7,8-dihydro-6H-pyrrolo[1,2- a]pyrimidine-6-carboxylate (50 mg, 0.2 mmol), 5-phenylthiophene-2-carboxylic acid (150 mg, 0.73 mmol), DMF (2.0 mL), and 1-methylimidazole (0.125 mL, 1.57 mmol) at room temperature. [Chloro(dimethylamino)methylene]-dimethyl-ammonium hexafluorophosphate (200 mg, 0.7 mmol) was then added, and the resulting mixture was stirred at room temperature for 4 hours. Afterwards, the mixture was diluted in EtOAc (25 mL) and washed with saturated NaHCO3solution (50 mL). The organic layer was then washed with brine (75 mL), dried over sodium sulfate, filtered, and concentrated in vacuo. Flash chromatography (RediSep Rf Gold silica, 24g, 0-100% EtOAc in hexanes) afforded the title compound (90 mg, 0.2057 mmol, 103.4% yield) as a white solid.1H NMR (400 MHz, DMSO) δ 8.44 (d, J = 3.9 Hz, 1H), 8.07 (d, J = 4.0 Hz, 1H), 7.95 (s, 1H), 7.75 (d, J = 7.7 Hz, 2H), 7.61 (d, J = 3.9 Hz, 1H), 7.46 (t, J = 7.5 Hz, 2H), 7.39 (t, J = 7.7 Hz, 1H), 4.99 (dd, J = 9.9, 3.2 Hz, 1H), 3.16 – 3.01 (m, 2H), 2.62 (dd, J = 13.1, 9.5 Hz, 1H), 2.22 – 2.10 (m, 1H), 1.44 (s, 9H). LC / MS: (ESI+) m / z = 438 [M+H]+Step 2: (6S)-4-Oxo-3-[(5-phenylthiophene-2-carbonyl)amino]-7,8-dihydro-6H-pyrrolo[1,2-a]pyrimidine-6- carboxylic acid A 20 mL vial was charged with tert-butyl (6S)-4-oxo-3-[(5-phenylthiophene-2-carbonyl)amino]-7,8- dihydro-6H-pyrrolo[1,2-a]pyrimidine-6-carboxylate (87 mg, 0.20 mmol) and DCM (2.5 mL) and cooled to 0 ˚C in a brine / ice bath. TFA (2 mL) was added dropwise, and the resulting mixture was allowed to warm to room temperature and stir for 3 hours. Afterwards, the mixture was concentrated in vacuo to afford the title compound (80 mg, 0.2098 mmol, 105.5% yield) as a white solid, which was directly carried forward to the next reaction. LC / MS: (ESI+) m / z = 382 [M+H]+. Step 3: (6S)-4-Oxo-3-[(5-phenylthiophene-2-carbonyl)amino]-N-(1H-pyrrolo[3,2-c]pyridin-2-ylmethyl)-7,8- dihydro-6H-pyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 4) (formic acid salt) A 20 mL vial was charged with 1H-pyrrolo[3,2-c]pyridin-2-ylmethanamine;dihydrochloride (60 mg, 0.27260 mmol), (6S)-4-oxo-3-[(5-phenylthiophene-2-carbonyl)amino]-7,8-dihydro-6H-pyrrolo[1,2- a]pyrimidine-6-carboxylic acid (80 mg, 0.2 mmol), DMF (5 mL), and TEA (0.500 mL, 3.77 mmol) and cooled to 0 ˚C in a brine / ice bath. T3P (0.300 mL, 0.504 mmol) was then added dropwise, and the resulting mixture was stirred at 0 ˚C for 30 minutes. Afterwards, the mixture was diluted with EtOAc (50 mL), washed with saturated NaHCO3(100 mL) and brine (100 mL), dried over Na2SO4, filtered, and concentrated in vacuo. Flash chromatography (RediSep Rf Gold silica, 12g, 0-50% MeOH in DCM) followed by prep-HPLC (C18, 150 x 21 mm, 5 μM, 5-50% MeCN [0.1% FA] in water [0.1% FA]) and lyophilization afforded Compound 4 as its formic acid salt (37 mg, 0.06648 mmol, 31.69% yield) as a white solid.1H NMR (400 MHz, DMSO-d6) δ 11.41 (s, 1H), 9.62 (s, 1H), 9.04 (t, J = 5.6 Hz, 1H), 8.75 (s, 1H), 8.46 (s, 1H), 8.17 (s, 1H), 8.12 (d, J = 5.6 Hz, 1H), 8.06 (d, J = 4.0 Hz, 1H), 7.75 (dd, J = 7.2, 1.7 Hz, 2H), 7.62 (d, J = 4.0 Hz, 1H), 7.47 (t, J = 7.6 Hz, 2H), 7.39 (t, J = 7.4 Hz, 1H), 7.33 (d, J = 5.6 Hz, 1H), 6.47 (s, 1H), 5.12 (dd, J = 9.4, 3.0 Hz, 1H), 4.49 (qd, J = 15.8, 5.5 Hz, 2H), 3.19 – 3.00 (m, 2H), 2.63 – 2.53 (m, 1H), 2.35 – 2.15 (m, 1H). LC / MS: (ESI+) m / z = 511 [M+H]+. RT (Method A): 1.15 min. The following compounds were isolated as their formic acid salts based on the procedures set forth above.

[0003] aStep 3 was performed with HATU and DIPEA instead of T3P and TEA.bStep 2 was performed with HCl / 1,4-dioxane under N2at 60 °C in 2 hours.cStep 2 was performed with HCl / 1,4-dioxane in DCM in 2 hours.dStep 1 was performed in MeCN. Scheme 4. Synthesis of (6S)-4-Oxo-3-(3-phenylpropylamino)-N-(1H-pyrrolo[3,2-c]pyridin-2- ylmethyl)-7,8-dihydro-6H-pyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 6) Step 1: tert-Butyl (6S)-4-oxo-3-(3-phenylpropylamino)-7,8-dihydro-6H-pyrrolo[1,2-a]pyrimidine-6- carboxylate A 250 mL round bottom flask was charged with tert-butyl (6S)-3-amino-4-oxo-7,8-dihydro-6H- pyrrolo[1,2-a]pyrimidine-6-carboxylate (100 mg, 0.4 mmol), 3-phenylpropanal (55 mg, 0.41 mmol), DCE (5 mL), and AcOH (0.023 mL, 0.40 mmol) at room temperature under nitrogen. The mixture was allowed to stir for 30 minutes, and sodium triacetoxyborohydride (120 mg, 0.56620 mmol) was added to the mixture. The reaction mixture was allowed to stir overnight at room temperature. Afterwards, the mixture was diluted in DCM (25 mL), washed with saturated NaHCO3 solution (50 mL) and brine (50 mL), dried over NA2SO4, filtered, and concentrated in vacuo. Flash chromatography (RediSep Rf Gold silica, 40g, 0-10% MeOH in DCM) afforded the title compound (56 mg, 0.15 mmol, 38% yield) as a yellow solid.1H NMR (400 MHz, DMSO) δ 7.32 – 7.25 (m, 2H), 7.25 – 7.12 (m, 3H), 6.92 (s, 1H), 5.23 (s, 1H), 4.88 (dd, J = 9.7, 3.2 Hz, 1H), 3.00 (t, J = 6.8 Hz, 2H), 2.96 – 2.86 (m, 2H), 2.68 – 2.60 (m, 2H), 2.57 – 2.51 (m, 1H), 2.15 – 2.03 (m, 1H), 1.84 (p, J = 7.4 Hz, 2H), 1.42 (s, 9H). LC / MS: (ESI+) m / z = 370 [M+H]+. Step 2: (6S)-4-Oxo-3-(3-phenylpropylamino)-7,8-dihydro-6H-pyrrolo[1,2-a]pyrimidine-6-carboxylic acid A 20 mL vial was charged with tert-butyl (6S)-4-oxo-3-(3-phenylpropylamino)-7,8-dihydro-6H- pyrrolo[1,2-a]pyrimidine-6-carboxylate (53 mg, 0.14 mmol) and DCM (1.5 mL), and the solution was cooled to 0 ˚C in a brine / ice bath. TFA (1 mL) was added dropwise, and the resulting mixture was allowed to warm to room temperature and stir for 3 hours. Afterwards, the mixture was concentrated in vacuo to the title compound (45 mg, 0.14 mmol, 100.1% yield) as a white solid that was directly carried forward to the next reaction. LC / MS: (ESI+) m / z = 314 [M+H]+. Step 3: (6S)-4-Oxo-3-(3-phenylpropylamino)-N-(1H-pyrrolo[3,2-c]pyridin-2-ylmethyl)-7,8-dihydro-6H- pyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 6) A 20 mL vial was charged with 1H-pyrrolo[3,2-c]pyridin-2-ylmethanamine;dihydrochloride (40 mg, 0.18 mmol), (6S)-4-oxo-3-(3-phenylpropylamino)-7,8-dihydro-6H-pyrrolo[1,2-a]pyrimidine-6-carboxylic acid (44 mg, 0.14 mmol), DMF (2 mL), and TEA (0.200 mL, 1.51 mmol), and the mixture was cooled to 0 ˚C in a brine / ice bath. T3P (0.160 mL, 0.269 mmol) was then added dropwise, and the resulting mixture was stirred at 0 ˚C for 30 minutes. Afterwards, the mixture was diluted with EtOAc (50 mL), washed with saturated NaHCO3 solution (100 mL) and brine (100 mL), dried over Na2SO4, filtered, and concentrated in vacuo. Flash chromatography (RediSep Rf Gold silica, 12g, 0-50% MeOH in DCM) followed by prep- HPLC (C18, 150 x 21 mm, 5 μM, 5-50% MeCN [0.1% FA] in water [0.1% FA]) and lyophilization afforded Compound 6 (22.3 mg, 0.0504 mmol, 35.9% yield) as a white solid.1H NMR (400 MHz, MeOD) δ 8.84 (s, 1H), 8.51 (s, 1H), 8.18 (d, J = 6.2 Hz, 1H), 7.62 (d, J = 6.1 Hz, 1H), 7.26 (t, J = 7.5 Hz, 2H), 7.23 – 7.11 (m, 3H), 6.99 (s, 1H), 6.76 (s, 1H), 5.11 (dd, J = 9.2, 3.6 Hz, 1H), 4.75 (d, J = 16.0 Hz, 1H), 4.58 (d, J = 16.0 Hz, 1H), 3.20 – 3.12 (m, 1H), 3.11 (t, J = 7.0 Hz, 2H), 3.05 – 2.95 (m, 1H), 2.72 (t, J = 7.6 Hz, 2H), 2.65 – 2.54 (m, 1H), 2.35 – 2.23 (m, 1H), 1.95 (p, J = 7.3 Hz, 2H). LC / MS: (ESI+) m / z = 443 [M+H]+. RT (Method A): 0.94 min. The following compounds were prepared based on the procedures set forth above.

[0004] aHATU was used in place of T3P in Step 3. Scheme 5. Synthesis of (S)-N-((1H-Pyrrolo[3,2-c]pyridin-2-yl)methyl)-3-(((R)-1-(dibenzo-[b,d]furan- 2-yl)ethyl)amino)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 8) To a solution of bicyclo[2.2.1]hepta-2,5-diene (10.0 g, 109 mmol) in DCM (100 mL) was added sulfurisocyanatidic chloride (16.7 g, 118 mmol) dropwise at -15 °C, and the reaction mixture was stirred at room temperature for 2 hours. The mixture was quenched with saturated aq. Na2S2O3 solution, adjusted to pH 9 with 1N aq. NaOH solution, and extracted with DCM twice. The combined organic layers were washed with brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 0 - 5% MeOH in DCM) to give the title compound (1.1 g, yield 7.5%) as a yellow solid. Step 2: Methyl (S)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxylate To a solution of 3-azatricyclo[4.2.1.02,5]non-7-en-4-one (1.0 g, 7.41 mmol) in ethylbenzene (2 mL) was added methyl (S)-5-methoxy-3,4-dihydro-2H-pyrrole-2-carboxylate (2.9 g, 18.47 mmol), and the mixture was stirred under N2atmosphere at 130 °C overnight. The mixture was concentrated under reduced pressure to remove ethylbenzene, and the mixture was stirred at 150 °C for another 8 hours. The mixture was concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 0 - 50% EtOAc in PE) to give the title compound (752 mg, yield 52.3%) as a yellow oil. LC / MS (ESI) m / z: 195 (M+H)+. Step 3: Methyl (S)-3-bromo-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxylate To a solution of methyl (S)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxylate (750 mg, 3.87 mmol) in CHCl3(7 mL) was added Br2(623 mg, 3.89 mmol) under N2atmosphere, and the reaction mixture was stirred at room temperature for 4 hours. The mixture was quenched with saturated aq. Na2S2O3 solution and extracted wit EtOAc twice. The combined organic layers were washed with brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 0 - 60% EtOAc in PE) to give the title compound (280 mg, yield 26.6%) as a yellow solid. LC / MS (ESI) m / z: 273 (M+H)+. Step 4: Methyl (S)-3-(((R)-1-(dibenzo[b,d]furan-2-yl)ethyl)amino)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2- a]pyrimidine-6-carboxylate To a mixture of methyl (S)-3-bromo-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]-pyrimidine-6- carboxylate (280 mg, 1.03 mmol) and (R)-1-(dibenzo[b,d]furan-2-yl)-ethan-1-amine (294 mg, 1.39 mmol) in toluene (6 mL) was added Cs2CO3(670 mg, 2.06mmol), BINAP (128 mg, 0.21 mmol), and Pd2(dba)3(23 mg, 0.10 mmol) under N2atmosphere, and the reaction mixture was degassed under N2atmosphere for three times and stirred under N2 atmosphere at 100 °C for 5 hours. The mixture was diluted with EtOAc, washed with brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 0 - 40% EtOAc in PE) to give the title compound (150 mg, yield 36.1%) as a yellow oil. LC / MS (ESI) m / z: 404 (M+H)+. Step 5: (S)-3-(((R)-1-(Dibenzo[b,d]furan-2-yl)ethyl)amino)-4-oxo-4,6,7,8-tetrahydro-pyrrolo[1,2- a]pyrimidine-6-carboxylic acid To a solution of methyl (S)-3-(((R)-1-(dibenzo[b,d]furan-2-yl)ethyl)amino)-4-oxo-4,6,7,8- tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxylate (150 mg, 0.37 mmol) in MeOH / water (5.0 mL, v / v= 2 / 1) was added LiOH (35.7 mg, 1.49 mmol) and the reaction mixture was stirred at room temperature for 1 hour. The mixture was acidified with 1N aq. HCl to pH 3 and extracted with EtOAc twice. The combined organic layers were dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure to give the title compound (120 mg, yield 82.9%) as a white solid, which was used directly in the next step without further purification. LC / MS (ESI) m / z: 390 (M+H)+. Step 6: (S)-N-((1H-Pyrrolo[3,2-c]pyridin-2-yl)methyl)-3-(((R)-1-(dibenzo[b,d]furan-2-yl)-ethyl)amino)-4-oxo- 4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 8) To a mixture of (S)-3-(((R)-1-(dibenzo[b,d]furan-2-yl)ethyl)amino)-4-oxo-4,6,7,8- tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxylic acid (120 mg, 0.31 mmol) and (1H-pyrrolo[3,2-c]pyridin-2- yl)methanamine hydrochloride (66 mg, 0.45 mmol) in DMF (2 mL) was added DIPEA (198 mg, 1.53 mmol) and HATU (176 mg, 0.46 mmol) and the reaction mixture was stirred at room temperature for 1 hour. The mixture was diluted with EtOAc, washed with saturated aq. NaHCO3 solution, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 0 - 20% MeOH in DCM) and further purified by prep-HPLC to give Compound 8 (26.1 mg, yield 16.4%) as a white solid.1H NMR (400 MHz, DMSO-d6) δ: 11.37 (s, 1H), 8.95 (t, J = 5.5 Hz, 1H), 8.75 (s, 1H), 8.17 (d, J = 1.2 Hz, 1H), 8.11 (m, 2H), 7.68 (d, J = 8.2 Hz, 1H), 7.64 (d, J = 8.5 Hz, 1H), 7.58 - 7.48 (m, 2H), 7.39 (t, J = 7.5 Hz, 1H), 7.34 (d, J = 5.7 Hz, 1H), 6.79 (s, 1H), 6.46 (s, 1H), 5.55 (d, J = 6.8 Hz, 1H), 5.05 - 4.98 (m, 1H), 4.61 - 4.54 (m, 1H), 4.52 - 4.43 (m, 2H), 2.97 - 2.87 (m, 1H), 2.77 - 2.67 (m, 1H), 2.45 - 2.35 (m, 1H), 2.12 - 2.04 (m, 1H), 1.57 (d, J = 6.7 Hz, 3H). LC / MS (ESI) m / z: 519 (M+H)+. RT (Method A): 1.42 min. Scheme 6. Synthesis of (R)-N-((1H-Pyrrolo[3,2-c]pyridin-2-yl)methyl)-3-(((R)-1-(dibenzo-[b,d]furan- 2-yl)ethyl)amino)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 10) A mixture of methyl (R)-5-oxopyrrolidine-2-carboxylate (7.0 g, 48.95 mmol) and dimethyl sulfate (8.12 g, 64.44 mmol) was stirred under N2atmosphere at 60 °C for 22 hours. The mixture was cooled to room temperature and added dropwise to a solution of TEA (10 mL) in MTBE (100 mL) at 0 °C. The reaction mixture was quenched with saturated aq. Na2CO3 solution and extracted with MTBE twice. The combined organic layers were washed with brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 0 - 30% EtOAc in PE) to give the title compound (1.1 g, yield 14.3%) as a colorless oil. LC / MS (ESI) m / z: 158 (M+H)+. Step 2: Methyl (R)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxylate To a solution of 3-azatricyclo[4.2.1.02,5]non-7-en-4-one (380 mg, 2.81 mmol) in ethylbenzene (4 mL) was added methyl (R)-5-methoxy-3,4-dihydro-2H-pyrrole-2-carboxylate (1.1 g, 7.0 mmol), and the mixture was stirred under N2 atmosphere at 120 °C overnight. The mixture was concentrated under reduced pressure to remove ethylbenzene, and the mixture was stirred at 150 °C for another 8 hours. The mixture was concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 0 - 50% EtOAc in PE) to give the title compound (370 mg, yield 78.8%) as a yellow oil. LC / MS (ESI) m / z: 195 (M+H)+. Step 3: Methyl (R)-3-bromo-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxylate To a solution of methyl (R)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxylate (370 mg, 1.91 mmol) in chloroform (4 mL) was added Br2(305 mg, 1.91 mmol) under N2atmosphere, and the reaction mixture was stirred at room temperature for 4 hours. The mixture was quenched with saturated aq. Na2S2O3solution and extracted with EtOAc twice. The combined organic layers were washed with brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 0 - 60% EtOAc in PE) to give the title compound (80 mg, yield 15.4%) as a yellow solid. LC / MS (ESI) m / z: 273 (M+H)+. Step 4: Methyl (R)-3-(((R)-1-(dibenzo[b,d]furan-2-yl)ethyl)amino)-4-oxo-4,6,7,8-tetrahydro-pyrrolo[1,2- a]pyrimidine-6-carboxylate To a mixture of methyl (R)-3-bromo-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6- carboxylate (80 mg, 0.29 mmol) and (R)-1-(dibenzo[b,d]furan-2-yl)ethan-1-amine hydrochloride (124 mg, 0.59 mmol) in toluene (1 mL) was added Cs2CO3 (191 mg, 0.59 mmol), BINAP (37 mg, 0.06 mmol), and Pd2(dba)3(7 mg, 0.03 mmol) under N2atmosphere, and the reaction mixture was degassed under N2atmosphere for three times and stirred under N2 atmosphere at 100 °C for 5 hours. The mixture was diluted with EtOAc, washed with brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 0 - 40% EtOAc in PE) to give the title compound (67 mg, yield 56.5%) as a yellow oil. LC / MS (ESI) m / z: 404 (M+H)+. Step 5: (R)-3-(((R)-1-(Dibenzo[b,d]furan-2-yl)ethyl)amino)-4-oxo-4,6,7,8-tetrahydropyrrolo-[1,2- a]pyrimidine-6-carboxylic acid To a solution of methyl (R)-3-(((R)-1-(dibenzo[b,d]furan-2-yl)ethyl)amino)-4-oxo-4,6,7,8- tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxylate (67 mg, 0.17 mmol) in MeOH / water (3.0 mL, v / v = 2 / 1) was added LiOH (16 mg, 0.67 mmol), and the reaction mixture was stirred at room temperature for 1 hour. The mixture was acidified with 1N aq. HCl to pH 3 and extracted with EtOAc twice. The combined organic layers were dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure to give the title compound (64 mg, yield 99.0%) as a white solid, which was used directly in the next step without further purification. LC / MS (ESI) m / z: 390 (M+H)+. Step 6: (R)-N-((1H-Pyrrolo[3,2-c]pyridin-2-yl)methyl)-3-(((R)-1-(dibenzo[b,d]furan-2-yl)ethyl)amino)-4-oxo- 4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 10) To a mixture of (R)-3-(((R)-1-(dibenzo[b,d]furan-2-yl)ethyl)amino)-4-oxo-4,6,7,8- tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxylic acid (64 mg, 0.16 mmol) and (1H-pyrrolo[3,2-c]pyridin-2- yl)methanamine hydrochloride (46 mg, 0.25 mmol) in DMF (1 mL) was added DIPEA (108 mg, 0.84 mmol) and HATU (95 mg, 0.25 mmol), and the reaction mixture was stirred at room temperature for 1 hour. The mixture was diluted with EtOAc, washed with saturated aq. NaHCO3solution and brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 0 - 20% MeOH in DCM) and further purified by prep-HPLC to give Compound 10 (5.1 mg, yield 5.9%) as a white solid.1H NMR (400 MHz, DMSO-d6) δ 11.37 (s, 1H), 8.94 (t, J = 5.5 Hz, 1H), 8.76 (s, 1H), 8.16 (s, 1H), 8.12 (d, J = 5.6 Hz, 1H), 8.06 (d, J = 7.7 Hz, 1H), 7.67 (d, J = 8.2 Hz, 1H), 7.63 (d, J = 8.6 Hz, 1H), 7.59 - 7.56 (m, 1H), 7.52 - 7.48 (m, 1H), 7.37 (t, J = 7.5 Hz, 1H), 7.33 (d, J = 5.6 Hz, 1H), 6.82 (s, 1H), 6.46 (s, 1H), 5.56 (d, J = 7.1 Hz, 1H), 5.04 - 4.99 (m, 1H), 4.57 (t, J = 6.9 Hz, 1H), 4.50 - 4.40 (m, 2H), 2.92 - 2.79 (m, 2H), 2.46 - 2.39 (m, 1H), 2.10 - 2.05 (m, 1H), 1.56 (d, J = 6.7 Hz, 3H). LC / MS (ESI) m / z: 519 (M+H)+. RT (Method A): 1.36 min. The following compounds were prepared based on Steps 4-6 shown in Scheme 6. Scheme 7. Synthesis of (S)-N-((1H-pyrrolo[3,2-c]pyridin-2-yl)methyl)-3-(((S)-2,3-dihydro-1H-inden- 1-yl)amino)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 12) Step 1: Ethyl (2S)-5-methoxy-3,4-dihydro-2H-pyrrole-2-carboxylate A round bottom flask was charged with ethyl (2S)-5-oxopyrrolidine-2-carboxylate (1.00 g, 6.36 mmol), dichloromethane (30 mL, 468.0 mmol), and cooled to 0 ˚C in a brine / ice bath. Trimethyloxonium;tetrafluoroborate (1.050 g, 7.099 mmol) was added portionwise, and the resulting mixture was allowed to warm to room temperature and stir for 3 hours. Afterwards, the mixture was cooled to 0 ˚C and quenched with saturated NaHCO3 solution (100 mL). The layers were separated, and the aqueous layer was extracted with DCM (3 x 50 mL). The combined organic layers were dried over anhydrous MgSO4, filtered, and concentrated in vacuo to afford the title compound (960 mg, 5.6 mmol,79% yield) as a light-yellow oil.1H NMR (400 MHz, CDCl3) δ 4.51 (dd, J = 8.6, 5.7 Hz, 1H), 4.19 (q, J = 7.1 Hz, 2H), 3.86 (s, 3H), 2.65 – 2.55 (m, 1H), 2.55 – 2.42 (m, 1H), 2.40 – 2.25 (m, 1H), 2.25 – 2.06 (m, 1H), 1.28 (t, J = 7.1 Hz, 3H). LC / MS: (ESI)+ m / z = 171.76 [M+H]+. Step 2: Ethyl (6S)-4-oxo-7,8-dihydro-6H-pyrrolo[1,2-a]pyrimidine-6-carboxylate A 100 mL round bottom was charged with ethyl (2S)-5-methoxy-3,4-dihydro-2H-pyrrole-2- carboxylate (950 mg, 5.5494 mmol), 3-azatricyclo[4.2.1.02,5]non-7-en-4-one (1.10 g, 8.14 mmol), and toluene (1.0 mL, 9.5 mmol) at room temperature, and the mixture was heated to 110 ˚C overnight. Afterwards, the mixture was allowed to cool to room temperature and subjected to flash chromatography (RediSep Rf Gold silica, 40g, 0-100% EtOAc in hexanes) to afford ethyl (1S)-9-oxo-1,2,3,4a,5,8,8a,9- octahydro-5,8-methanopyrrolo[2,1-b]quinazoline-1-carboxylate as a black oil. (LC / MS: (ESI)+ m / z = 274.76 [M+H]+). The oil was then heated to 150 ˚C for 1 hour and allowed to cool to room temperature to afford the title compound (650 mg, 3.1 mmol, 56% Yield) as a black oil, which was carried forward without further purification. LC / MS: (ESI)+ m / z = 208.86 [M+H]+. Step 3: Ethyl (6S)-3-bromo-4-oxo-7,8-dihydro-6H-pyrrolo[1,2-a]pyrimidine-6-carboxylate A 100 mL round bottom flask was charged with ethyl (6S)-4-oxo-7,8-dihydro-6H-pyrrolo[1,2- a]pyrimidine-6-carboxylate (600 mg, 2.88 mmol), DMF (5 mL), and 1-bromopyrrolidine-2,5-dione (600 mg, 3.37 mmol) at room temperature. The mixture was then heated to 50 ˚C for 30 minutes. Afterwards, the mixture was allowed to cool to room temperature and diluted in water (100 mL). The mixture was then extracted with EtOAc (3 x 25 mL). The layers were separated, and the combined organic extracts were then washed with brine (150 mL), dried over Na2SO4, filtered, and concentrated in vacuo. Flash chromatography (RediSep Rf Gold silica, 40g, 0-10% MeOH in DCM) afforded the title compound (550 mg, 1.9 mmol, 66.5% yield) as an orange oil.1H NMR (400 MHz, CDCl3) δ 8.18 (s, 1H), 5.10 (dd, J = 9.7, 3.0 Hz, 1H), 4.34 – 4.20 (m, 2H), 3.30 – 3.14 (m, 1H), 3.14 – 3.03 (m, 1H), 2.68 – 2.52 (m, 1H), 2.40 – 2.28 (m, 1H), 1.30 (t, J = 7.1 Hz, 3H). LC / MS: (ESI)+ m / z = 286.92 [M+H]+. Step 4: ethyl (S)-3-(((S)-2,3-dihydro-1H-inden-1-yl)amino)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2- a]pyrimidine-6-carboxylate A 20 mL microwave vial was charged with (1S)-indan-1-amine (65 mg, 0.49 mmol), ethyl (6S)-3- bromo-4-oxo-7,8-dihydro-6H-pyrrolo[1,2-a]pyrimidine-6-carboxylate (100 mg, 0.35 mmol), Cs2CO3 (230 mg, 0.71 mmol), Pd(OAc)2(6 mg, 0.027 mmol), and [1-(2-diphenylphosphanyl-1-naphthyl)-2-naphthyl]- diphenyl-phosphane (34 mg, 0.055 mmol), and was subsequently crimp sealed and placed under nitrogen.1,4-Dioxane (5.0 mL) was added, and the resulting mixture was sparged with nitrogen for 10 minutes. The vessel was then heated to 110 °C for 18 hours. Afterwards, the mixture was allowed to cool to room temperature, filtered over Celite, washed with EtOAc, adsorbed onto Celite, and concentrated in vacuo. Reverse-phase flash chromatography (RediSep Rf Gold C18, 15.5g, 10-100% MeCN [0.1% FA] in water [0.1% FA]) and lyophilization afforded the title compound (50 mg, 0.15 mmol, 42% yield) as a brown solid.1H NMR (400 MHz, CDCl3) δ 7.97 – 7.69 (m, 1H), 7.64 – 7.06 (m, 3H), 6.94 – 6.66 (m, 1H), 5.06 (d, J = 9.6 Hz, 1H), 4.88 (s, 1H), 4.73 (s, 1H), 4.40 – 4.11 (m, 2H), 3.29 – 2.84 (m, 4H), 2.63 – 2.48 (m, 2H), 2.41 – 2.16 (m, 1H), 2.10 – 1.83 (m, 1H), 1.30 (td, J = 7.1, 3.2 Hz, 3H). LC / MS: (ESI+) m / z = 340 [M+H]+. Step 5: (S)-3-(((S)-2,3-Dihydro-1H-inden-1-yl)amino)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6- carboxylic acid A 20 mL vial was charged with ethyl (6S)-3-[[(1S)-indan-1-yl]amino]-4-oxo-7,8-dihydro-6H- pyrrolo[1,2-a]pyrimidine-6-carboxylate (50 mg, 0.1473 mmol), THF (2.5 mL) and MeOH (0.50 mL). Sodium hydroxide (1M, 0.450 mL) was added, and the resulting solution was stirred at room temperature for 60 minutes. The pH of the solution was then adjusted to pH 2 with 1M HCl, then the solution was diluted with brine (10 mL). The aqueous layer was then extracted with EtOAc (3 x 20 mL). The layers were separated, and the combined organic layers were then dried over Na2SO4, filtered, and concentrated in vacuo to afford the title compound (45 mg, 0.14 mmol, 98% Yield) as a yellow residue, which was directly carried forward to the next reaction. LC / MS: (ESI+) m / z = 312 [M+H]+. Step 6: (S)-N-((1H-Pyrrolo[3,2-c]pyridin-2-yl)methyl)-3-(((S)-2,3-dihydro-1H-inden-1-yl)amino)-4-oxo- 4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 12) A 20 mL vial was charged with 1H-pyrrolo[3,2-c]pyridin-2-ylmethanamine;dihydrochloride (35 mg, 0.16 mmol), (6S)-3-[[(1S)-indan-1-yl]amino]-4-oxo-7,8-dihydro-6H-pyrrolo[1,2-a]pyrimidine-6-carboxylic acid (45 mg, 0.1446 mmol), DMF (2 mL), and TEA (0.100 mL, 0.753 mmol) and cooled to 0 ˚C in a brine / ice bath. T3P (0.260 mL, 0.437 mmol) was then added dropwise, and the resulting mixture was stirred at 0 ˚C for 30 minutes. Afterwards, the mixture was diluted with EtOAc (50 mL), washed with saturated NaHCO3(100 mL) and brine (100 mL), dried over Na2SO4, filtered, and concentrated in vacuo. Flash chromatography (RediSep Rf Gold silica, 12g, 0-50% MeOH in DCM) followed by prep-HPLC (C18, 150 x 21 mm, 5 μM, 5-50% MeCN [0.1% FA] in water [0.1% FA]) and lyophilization afforded Compound 12 (4.5 mg, 0.010 mmol, 7.1% yield) as a white solid.1H NMR (400 MHz, DMSO-d6) δ 11.45 (s, 1H), 9.02 (t, J = 5.3 Hz, 1H), 8.73 (s, 1H), 8.40 (s, 2H), 8.11 (d, J = 5.3 Hz, 1H), 7.37 – 7.11 (m, 6H), 6.44 (s, 1H), 5.11 – 5.00 (m, 2H), 5.00 – 4.90 (m, 1H), 4.57 – 4.38 (m, 2H), 3.03 – 2.92 (m, 2H), 2.91 – 2.78 (m, 2H), 2.20 – 2.03 (m, 1H), 1.98 – 1.83 (m, 1H). LC / MS: (ESI+) m / z = 441 [M+H]+. RT (Method A): 0.84 min. Scheme 8. Synthesis of (S)-N-((1H-Pyrrolo[3,2-c]pyridin-2-yl)methyl)-4-oxo-3-(((R)-1-(2- phenyloxazol-4-yl)ethyl)amino)-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 13) To a solution of benzamide (8.0 g, 66 mmol) in 1,4-dioxane / EtOH (80 mL, v / v= 1 / 1) was added 1- bromobutane-2,3-dione (10.9 g, 66.1 mmol), and the reaction mixture was stirred at 90 °C overnight. The mixture was concentrated under reduced pressure to half volume and extracted with EtOAc twice. The combined organic layers were washed with brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 0 - 5% EtOAc in PE) to give the title compound (1.8 g, yield 14.6%) as a yellow solid. LC / MS (ESI) m / z: 188 (M+H)+. Step 2: (R,Z)-2-Methyl-N-(1-(2-phenyloxazol-4-yl)ethylidene)propane-2-sulfinamide To a mixture of 1-(2-phenyloxazol-4-yl)ethan-1-one (1.8 g, 9.61 mmol) and (R)-2-methylpropane- 2-sulfinamide (4.67 g, 38.7 mmol) in THF (20 mL) was added Ti(OEt)4 (8.77 g, 38.5 mmol) under N2 atmosphere, and the reaction mixture was stirred at 70 °C overnight. The mixture was diluted with EtOAc, washed with water and brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure to give the title compound (1 g, yield 35.8%) as a brown oil, which was used directly in the next step without further purification. LC / MS (ESI) m / z: 291 (M+H)+. Step 3: (R)-2-Methyl-N-((R)-1-(2-phenyloxazol-4-yl)ethyl)propane-2-sulfinamide To a solution of ((R,Z)-2-methyl-N-(1-(2-phenyloxazol-4-yl)ethylidene)propane-2-sulfinamide (1 g, 3.44 mmol) in THF (10 mL) was added DIBAL-H (13 mL, 20.0 mmol, 1.5 M in THF) dropwise at -78 °C under N2 atmosphere, and the mixture was stirred under N2 atmosphere at -78 °C for 30 minutes. The mixture was quenched with saturated aq. potassium sodium tartrate solution at 0 °C and extracted with EtOAc twice. The combined organic layers were washed with brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure then purified by flash chromatography (silica gel, 0 - 80% EtOAc in PE) to give the title compound (625 mg, yield 62.0%) as a yellow solid. LC / MS (ESI) m / z: 293 (M+H)+. Step 4: (R)-1-(2-Phenyloxazol-4-yl)ethan-1-amine hydrochloride To a solution of (R)-2-methyl-N-((R)-1-(2-phenyloxazol-4-yl)ethyl)propane-2-sulfinamide (620 mg, 2.12 mmol) in DCM (4 mL) was added HCl / 1,4-dioxane (2 mL, 4 M), and the reaction mixture was stirred under N2atmosphere at room temperature for 1 hour. The reaction mixture was concentrated under reduced pressure to give the title compound (450 mg, yield 94.4%) as a yellow solid, which was used directly in the next step without further purification. LC / MS (ESI) m / z: 189 (M+H)+. Step 5: Methyl (S)-4-oxo-3-(((R)-1-(2-phenyloxazol-4-yl)ethyl)amino)-4,6,7,8-tetrahydro-pyrrolo[1,2- a]pyrimidine-6-carboxylate To a mixture of (R)-1-(2-phenyloxazol-4-yl)ethan-1-amine hydrochloride (130 mg, 0.51 mmol) and methyl (S)-6-bromo-5-oxo-1,2,3,5-tetrahydroindolizine-3-carboxylate (100 mg, 0.36 mmol) in toluene (5 mL) was added Cs2CO3 (359 mg, 1.10 mmol), BINAP (45 mg, 0.072 mmol), Pd(OAc)2 (8 mg, 0.035 mmol) under N2 atmosphere, and the reaction mixture was degassed under N2 atmosphere for three times and stirred at 100 °C overnight. The mixture was diluted with EtOAc, washed with brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 0 - 20% MeOH in DCM) to give the title compound (20 mg, yield 14.3%) as a yellow solid. LC / MS (ESI) m / z: 381 (M+H)+. Step 6: (S)-4-Oxo-3-(((R)-1-(2-phenyloxazol-4-yl)ethyl)amino)-4,6,7,8-tetrahydropyrrolo-[1,2-a]pyrimidine- 6-carboxylic acid To a solution of methyl (S)-4-oxo-3-(((R)-1-(2-phenyloxazol-4-yl)ethyl)amino)-4,6,7,8-tetra- hydropyrrolo[1,2-a]pyrimidine-6-carboxylate (20 mg, 0.052 mmol) in MeOH / water (2.0 mL, v / v = 4 / 1) was added LiOH·H2O (5 mg, 0.12 mmol), and the reaction mixture was stirred at room temperature for 1 hour. The mixture was acidified with 1N aq. HCl to pH 3 and extracted with EtOAc twice. The combined organic layers were dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure to give the title compound (18 mg, yield 93.4%) as a yellow solid, which was used directly in the next step without further purification. LC / MS (ESI) m / z: 367 (M+H)+. Step 7: (S)-N-((1H-Pyrrolo[3,2-c]pyridin-2-yl)methyl)-4-oxo-3-(((R)-1-(2-phenyloxazol-4-yl)ethyl)amino)- 4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 13) To a mixture of (S)-4-oxo-3-(((R)-1-(2-phenyloxazol-4-yl)ethyl)amino)-4,6,7,8-tetrahydro- pyrrolo[1,2-a]pyrimidine-6-carboxylic acid (18 mg, 0.049 mmol) and (1H-pyrrolo[3,2-c]pyridin-2- yl)methanamine hydrochloride (15 mg, 0.081 mmol) in DMF (2 mL) was added DIPEA (32 mg, 0.24 mmol) and HATU (22 mg, 0.057 mmol), and the reaction mixture was stirred at room temperature for 1 hour. The mixture was concentrated under reduced pressure. The residue was purified by prep-HPLC and further purified by prep-SFC (Chiral Cel OJ, 250×21.2mm I.D., 5µm, A for CO2and B for MeOH (0.1% 7mol / L NH3 in MeOH)) to give Compound 13 (2.9 mg, yield 11.9%) as a white solid.1H NMR (400 MHz, CD3OD) δ 8.70 (s, 1H), 8.38 (d, J = 4.3 Hz, 1H), 8.10 - 8.06 (m, 3H), 7.57 - 7.46 (m, 4H), 7.34 (d, J = 5.8 Hz, 1H), 6.60 (s, 1H), 5.22 (dd, J = 9.6, 3.3 Hz, 1H), 4.66 - 4.59 (m, 2H), 4.47 - 4.39 (m, 1H), 3.39 - 3.34 (m, 1H), 3.25 - 3.19 (m, 1H), 2.71 - 2.64 (m, 1H), 2.39 - 2.32 (m, 1H), 1.51 - 1.48 (m, 3H). LC / MS (ESI) m / z: 496 (M+H)+. RT (Method A): 0.37 min. Scheme 9. Synthesis of (S)-N-((1H-pyrrolo[3,2-c]pyridin-2-yl)methyl)-3-((3-(4- fluorophenyl)propyl)amino)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide A 20 mL microwave vial was charged with 3-(4-fluorophenyl)propan-1-amine (75 mg, 0.49 mmol), ethyl (6S)-3-bromo-4-oxo-7,8-dihydro-6H-pyrrolo[1,2-a]pyrimidine-6-carboxylate (90 mg, 0.31 mmol), Cs2CO3 (230 mg, 0.71 mmol), Pd(OAc)2 (8 mg, 0.04 mmol), and BINAP (40 mg, 0.06 mmol), and was subsequently crimp sealed and placed under nitrogen. Toluene (5.0 mL) was added, and the resulting solution was sparged with nitrogen for 10 minutes. The vessel was then heated to 110 °C for 18 hours. Afterwards, the mixture was allowed to cool to room temperature, filtered over Celite, washed with EtOAc, adsorbed onto Celite, and concentrated in vacuo. Flash chromatography (RediSep Rf Gold silica, 12g, 10- 100% EtOAc in hexanes) afforded the title compound (23 mg, 0.064 mmol, 20.4% yield) as a brown solid. LC / MS: (ESI+) m / z = 360 [M+H]+. Step 2: (S)-3-((3-(4-Fluorophenyl)propyl)amino)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6- carboxylic acid A 20 mL vial was charged with ethyl (S)-3-((3-(4-fluorophenyl)propyl)amino)-4-oxo-4,6,7,8- tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxylate (23 mg, 0.064 mmol), THF (2.5 mL, 31 mmol) and MeOH (0.50 mL). NaOH (1M, 0.20 mL) was added, and the resulting solution was stirred at room temperature for 60 minutes. The pH of the solution was then adjusted to pH 2 with 1M HCl and diluted with brine (10 mL). The aqueous layer was then extracted with EtOAc (3 x 20 mL). The organic layer was then dried over Na2SO4, filtered, and concentrated in vacuo to afford the title compound (25 mg, 0.075 mmol, 117% Yield) as a yellow residue, which was directly carried forward to the next reaction. LC / MS: (ESI+) m / z = 312 [M+H]+. Step 3: (S)-N-((1H-Pyrrolo[3,2-c]pyridin-2-yl)methyl)-3-((3-(4-fluorophenyl)propyl)amino)-4-oxo-4,6,7,8- tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 21) A 20 mL vial was charged with 1H-pyrrolo[3,2-c]pyridin-2-ylmethanamine;dihydrochloride (20 mg, 0.09 mmol), (S)-3-((3-(4-fluorophenyl)propyl)amino)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6- carboxylic acid (25 mg, 0.075 mmol), DMF (1.0 mL), and TEA (0.100 mL, 0.753 mmol), and the mixture was cooled to 0 ˚C in a brine / ice bath. HATU (40 mg, 0.11 mmol) was then added dropwise, and the resulting mixture was stirred at 0 ˚C for 30 minutes. Afterwards, the mixture was diluted with EtOAc (50 mL), washed with saturated NaHCO3(50 mL), LiOH (0.5% w / v in water, 2 x 25 mL), and brine (50 mL), then dried over Na2SO4, filtered, and concentrated in vacuo. Prep-HPLC (RediSep C18Aq, 150 x 21 mm, 5 μM, 10-50% MeCN [0.1% FA] in water [0.1% FA]) and lyophilization afforded Compound 21 (6 mg, 0.013 mmol, 17% yield) as a white solid.1H NMR (400 MHz, DMSO-d6) δ 11.36 (s, 1H), 8.95 (t, J = 5.7 Hz, 1H), 8.73 (s, 1H), 8.11 (d, J = 5.6 Hz, 1H), 7.34 (d, J = 5.6 Hz, 1H), 7.30 – 7.22 (m, 2H), 7.09 (t, J = 8.8 Hz, 2H), 6.93 (s, 1H), 6.44 (s, 1H), 5.17 (t, J = 5.8 Hz, 1H), 5.01 (dd, J = 9.2, 2.9 Hz, 1H), 4.55 – 4.41 (m, 2H), 3.04 – 2.93 (m, 3H), 2.91 – 2.81 (m, 1H), 2.68 – 2.64 (m, 1H), 2.63 (t, J = 7.7 Hz, 2H), 2.48 – 2.42 (m, 1H), 2.19 – 2.05 (m, 1H), 1.84 (p, J = 7.3 Hz, 2H). LC / MS: (ESI+) m / z = 461 [M+H]+. RT (Method A): 1.10 min. Scheme 10. Synthesis of (S)-N-((1H-pyrrolo[3,2-c]pyridin-2-yl)methyl)-3-(((6- fluorobenzo[b]thiophen-2-yl)methyl)amino)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6- carboxamide (Compound 41) A 100 mL Schlenk flask was charged with 6-fluorobenzothiophene (550 mg, 3.6 mmol) and THF (6.0 mL) and cooled to -78 ˚C in a dry ice / acetone bath. N-BuLi (2.3M in cyclohexane / hexanes) (1.76 mL, 4.0 mmol) was then added dropwise, and the resulting mixture was stirred for 1 hour at -78 ˚C. DMF (0.300 mL) was then added dropwise at -78 ˚C. After stirring for 1 hour, the mixture was quenched while at -78 ˚C with saturated NH4Cl solution (25 mL). The mixture was then allowed to warm to room temperature then extracted with EtOAc (2 x 50 mL). The combined organic extracts were then washed with brine, dried over Na2SO4, filtered, and concentrated in vacuo. To the resulting solid was added minimal DCM (~ 1 mL) and heptanes (10 mL), and the suspension was sonicated for 5 minutes. The precipitate was then filtered, washed with heptanes, and dried to afford the title compound (362 mg, 2.01 mmol, 55.6% Yield) as a white solid.1H NMR (400 MHz, CDCl3) δ 10.07 (s, 1H), 8.00 (s, 1H), 7.91 (dd, J = 8.8, 5.2 Hz, 1H), 7.58 (d, J = 10.3 Hz, 1H), 7.21 (td, J = 8.8, 2.0 Hz, 1H). Step 2: tert-Butyl (S)-3-(((6-fluorobenzo[b]thiophen-2-yl)methyl)amino)-4-oxo-4,6,7,8- tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxylate A 100 mL round bottom flask was charged with tert-butyl (6S)-3-amino-4-oxo-7,8-dihydro-6H- pyrrolo[1,2-a]pyrimidine-6-carboxylate (60 mg, 0.24 mmol), 6-fluorobenzothiophene-2-carbaldehyde (50 mg, 0.28 mmol), DCE (2 mL), and AcOH (0.014 mL, 0.24 mmol) at room temperature under nitrogen. The mixture was allowed to stir for 30 minutes, and sodium triacetoxyborohydride (75 mg, 0.33 mmol) was added to the mixture. The reaction mixture was allowed to stir overnight at room temperature. Afterwards, EtOH (3 mL) and NaBH4(50 mg) were added, and the resulting mixture was stirred at room temperature for 30 minutes. The mixture was diluted with DCM (25 mL), washed with saturated NaHCO3 solution (50 mL) and brine (50 mL), then dried over Na2SO4, filtered, and concentrated in vacuo. Flash chromatography (RediSep Rf Gold silica, 40g, 0-10% MeOH in DCM) afforded the title compound (50 mg, 0.12 mmol, 50.4% Yield) as a yellow solid. LC / MS: (ESI+) m / z = 416 [M+H]+. Step 3: (S)-3-(((6-Fluorobenzo[b]thiophen-2-yl)methyl)amino)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2- a]pyrimidine-6-carboxylic acid A 100 mL round bottom flask was charged with tert-butyl (6S)-3-[(6-fluorobenzothiophen-2- yl)methylamino]-4-oxo-7,8-dihydro-6H-pyrrolo[1,2-a]pyrimidine-6-carboxylate (50 mg, 0.12 mmol) and DCM (2.0 mL), and the solution was cooled to 0 ˚C in a brine / ice bath. TFA (2.0 mL, 26 mmol) was added dropwise, and the resulting mixture was allowed to warm to room temperature and stir for 3 hours. Afterwards, the mixture was concentrated in vacuo to afford the title compound (43 mg, 0.12 mmol, 99% Yield) as a white solid, which was directly carried forward to the next reaction. LC / MS: (ESI+) m / z = 360 [M+H]+. Step 4: (S)-N-((1H-Pyrrolo[3,2-c]pyridin-2-yl)methyl)-3-(((6-fluorobenzo[b]thiophen-2-yl)methyl)amino)-4- oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 41) A 20 mL vial was charged with 1H-pyrrolo[3,2-c]pyridin-2-ylmethanamine;dihydrochloride (30 mg, 0.14 mmol), (6S)-3-[(6-fluorobenzothiophen-2-yl)methylamino]-4-oxo-7,8-dihydro-6H-pyrrolo[1,2- a]pyrimidine-6-carboxylic acid (40 mg, 0.11 mmol), DMF (2 mL), and TEA (0.100 mL, 0.753 mmol) and cooled to 0 ˚C in a brine / ice bath. HATU (65 mg, 0.17 mmol) was then added, and the resulting mixture was stirred at 0 ˚C for 30 minutes. Afterwards, the mixture was diluted in EtOAc (50 mL), washed with saturated NaHCO3 (50 mL), LiOH (0.5% in water) (2 x 10 mL) and brine (50 mL), dried over NaSO4, filtered, and concentrated in vacuo. Flash chromatography (RediSep Rf Gold silica, 4g, 0-50% MeOH in DCM) followed by prep-HPLC (C18, 150 x 21 mm, 5 μM, 5-50% MeCN [0.1% FA] in water [0.1% FA]) and lyophilization afforded Compound 41 (10 mg, 0.020 mmol, 18.4% yield) as a white solid.1H NMR (400 MHz, DMSO-d6) δ 11.38 (s, 1H), 8.97 (t, J = 5.6 Hz, 1H), 8.74 (s, 1H), 8.12 (d, J = 5.6 Hz, 1H), 7.82 – 7.75 (m, 2H), 7.40 – 7.33 (m, 2H), 7.20 (td, J = 9.1, 2.3 Hz, 1H), 7.03 (s, 1H), 6.46 (s, 1H), 6.06 (t, J = 6.2 Hz, 1H), 5.02 (dd, J = 9.2, 2.6 Hz, 1H), 4.56 (d, J = 6.2 Hz, 2H), 4.49 (d, J = 5.5 Hz, 2H), 3.02 – 2.89 (m, 1H), 2.89 – 2.77 (m, 1H), 2.47 – 2.41 (m, 1H), 2.17 – 2.05 (m, 1H). LC / MS: (ESI+) m / z = 489 [M+H]+. RT (Method A): 0.93 min. Compound 43 was prepared according to the procedures set forth above, using 6- chlorobenzothiophene in place of 6-fluorobenzothiophene as the starting material.1H NMR (400 MHz, DMSO-d6) δ 11.38 (s, 1H), 8.97 (t, J = 5.5 Hz, 1H), 8.74 (s, 1H), 8.12 (d, J = 5.6 Hz, 1H), 8.03 (s, 1H), 7.77 (d, J = 8.5 Hz, 1H), 7.41 – 7.32 (m, 3H), 7.02 (s, 1H), 6.46 (s, 1H), 6.09 (t, J = 6.2 Hz, 1H), 5.02 (dd, J = 9.3, 2.7 Hz, 1H), 4.57 (d, J = 6.1 Hz, 2H), 4.49 (d, J = 5.5 Hz, 2H), 3.01 – 2.87 (m, 1H), 2.87 – 2.75 (m, 1H), 2.48 – 2.39 (m, 1H), 2.18 – 2.02 (m, 1H). LC / MS: (ESI+) m / z = 505 [M+H]+. RT (Method A): 1.29 min. Scheme 11. Synthesis of (S)-N-(5-Chloro-2-(1H-tetrazol-1-yl)benzyl)-4-oxo-3-(5-phenyl-thiophene- 2-carboxamido)-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 44) To a mixture of methyl (S)-3-bromo-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6- carboxylate (500 mg, 1.84 mmol) and tert-butyl carbamate (236 mg, 2.02 mmol) in toluene (25 mL) was added Cs2CO3 (600 mg, 1.84 mmol), BrettPhos (197 mg, 0.37 mmol), and Pd2(dba)3 (336 mg, 0.37 mmol) under N2 atmosphere, the reaction mixture was degassed under N2 atmosphere for three times and stirred at 120 °C for 5 hours. The mixture was diluted with EtOAc, washed with water and brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure and then purified by prep-TLC (DCM: MeOH= 20: 1) to give the title compound (130 mg, yield 22.9%) as a cream-colored solid. LC / MS (ESI) m / z: 310 (M+H)+. Step 2: Methyl (S)-3-amino-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxylate To a solution of methyl (S)-3-((tert-butoxycarbonyl)amino)-4-oxo-4,6,7,8-tetrahydropyrrolo-[1,2- a]pyrimidine-6-carboxylate (50 mg, 0.16 mmol) in DCM (1 mL) was added TFA (1 mL), and the reaction mixture was stirred at room temperature for 3 hours. The reaction mixture was concentrated under reduced pressure to give the title compound (30 mg, yield 88.8%) as a white solid, which was used directly in the next step without further purification. LC / MS (ESI) m / z: 210 (M+H)+. Step 3: Methyl (S)-4-oxo-3-(5-phenylthiophene-2-carboxamido)-4,6,7,8-tetrahydropyrrolo-[1,2- a]pyrimidine-6-carboxylate To a mixture of methyl (S)-3-amino-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxylate (30 mg, 0.14 mmol) and 5-phenylthiophene-2-carboxylic acid (29 mg, 0.14 mmol) in MeCN (1 mL) was added TCFH (120 mg, 0.43 mmol) and NMI (35 mg, 0.43 mmol), and the mixture was stirred at room temperature for 1 hour. The mixture was diluted with EtOAc, washed with water and brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by prep- TLC (DCM: MeOH= 20: 1) to give the title compound (25 mg, yield 44.1%) as a yellow solid. LC / MS (ESI) (m / z): 396 (M+H)+. Step 4: (S)-4-Oxo-3-(5-phenylthiophene-2-carboxamido)-4,6,7,8-tetrahydropyrrolo [1,2-a]-pyrimidine-6- carboxylic acid To a solution of methyl (S)-4-oxo-3-(5-phenylthiophene-2-carboxamido)-4,6,7,8-tetrahydro- pyrrolo[1,2-a]pyrimidine-6-carboxylate (25 mg, 0.06 mmol) in MeOH (1 mL) and water (0.5 mL) was added LiOH (6 mg, 0.25 mmol), and the reaction mixture was stirred at room temperature for 1 hour. The mixture was acidified with 1N aq. HCl to pH 3 and extracted with EtOAc twice. The combined organic layers were washed with brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure to give the title compound (24 mg, yield 99.5%) as a yellow solid, which was used directly in the next reaction without further purification. LC / MS (ESI) m / z: 382 (M+H)+. Step 5: (S)-N-(5-Chloro-2-(1H-tetrazol-1-yl)benzyl)-4-oxo-3-(5-phenylthiophene-2-carboxamido)-4,6,7,8- tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 44) To a mixture of (S)-4-oxo-3-(5-phenylthiophene-2-carboxamido)-4,6,7,8-tetrahydropyrrolo-[1,2- a]pyrimidine-6-carboxylic acid (24 mg, 0.06 mmol) and (5-chloro-2-(1H-tetrazol-1-yl)phenyl)methanamine (25 mg, 0.12 mmol) in DMF (1 mL) was added DIPEA (51 mg, 0.40 mmol) and HATU (45 mg, 0.12 mmol), and the mixture was stirred at room temperature for 1 hour. The mixture was diluted with EtOAc, washed with water and brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by prep-HPLC (C18, 40-98% MeCN in water with 0.1% NH3.H2O) to give Compound 44 (5.7 mg, yield 15.8%) as a white solid.1H NMR (400 MHz, CD3OD) δ 9.57 (s, 1H), 8.79 (s, 1H), 7.85 (d, J = 4.0 Hz, 1H), 7.81 (d, J = 2.0 Hz, 1H), 7.73 (d, J = 7.4 Hz, 2H), 7.60 - 7.55 (m, 1H), 7.52 - 7.43 (m, 4H), 7.38 (t, J = 7.3 Hz, 1H), 5.12 - 5.09 (m, 1H), 4.39 - 4.24 (m, 2H), 3.26 - 3.18 (m, 1H), 3.14 - 3.08 (m, 1H), 2.62 - 2.53 (m, 1H), 2.29 - 2.19 (m, 1H). LC / MS (ESI) (m / z): 573 (M+H)+. RT (Method A): 2.10 min. Scheme 12. Synthesis of (3S,6R,8aS)-N-((1H-Pyrrolo[3,2-c]pyridin-2-yl)methyl)-5-oxo-6-(5-phenyl- thiophene-2-carboxamido)octahydroindolizine-3-carboxamide (Compound 45) To a solution of 1-(tert-butyl) 2-methyl (R)-5-oxopyrrolidine-1,2-dicarboxylate (8.5 g, 34.9 mmol) in THF (150 mL) was added vinylmagnesium bromide (42 mL, 42.0 mmol) dropwise at -40 °C under N2atmosphere and the mixture was stirred under N2atmosphere at -40 °C for 3 hours. The mixture was quenched with saturated aq. NH4Cl solution and extracted with EtOAc twice. The combined organic layers were washed with brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 30 - 60% EtOAc in PE) to give the title compound (7.0 g, yield 73.9%) as a colorless oil. LC / MS (ESI) m / z: 272 (M+H)+. Step 2: 9-(tert-Butyl) 1-methyl (2R)-2-((tert-butoxycarbonyl)amino)-8-((diphenyl-methylene)amino)-5- oxononanedioate To a mixture of methyl (R)-2-((tert-butoxycarbonyl)amino)-5-oxohept-6-enoate (5 g, 18.4 mmol) and tert-butyl 2-((diphenylmethylene)amino)acetate (6 g, 20.3 mmol) in THF (110 mL) was added Cs2CO3 (6 g, 18.4 mmol) under N2atmosphere, and the reaction mixture was stirred at room temperature overnight. The mixture was filtered, and the filtrate was concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 30 - 70% EtOAc in PE) to give the title compound (1.7 g, yield 16.3%) as a colorless oil. LC / MS (ESI) m / z: 567 (M+H)+. Step 3: tert-Butyl (3S,6R,8aS)-6-((tert-butoxycarbonyl)amino)-5-oxooctahydroindolizine-3-carboxylate To a solution of 9-(tert-butyl) 1-methyl (2R)-2-((tert-butoxycarbonyl)amino)-8-((diphenyl- methylene)amino)-5-oxononanedioate (880 mg, 1.6 mmol) in EtOH (16 mL) and AcOH (2 mL) was added Pd / C (100 mg, 10% w.t.). The mixture was degassed under N2 atmosphere for three times and stirred under a H2balloon at room temperature overnight. The mixture was basified with aq. NaHCO3to pH 8 and extracted with EtOAc twice. The combined organic layers were dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 40 - 70% EtOAc in PE) to give the title compound (200 mg, yield 36.3%) as a colorless oil.1H NMR (400 MHz, CDCl3) δ 5.25 (s, 1H), 4.30 (d, J = 9.6 Hz, 1H), 3.94 - 3.85 (m, 1H), 3.63 - 3.55 (m, 1H), 2.48 (s, 1H), 2.14 - 2.06 (m, 2H), 2.01 - 1.92 (m, 2H), 1.86 - 1.78 (m, 1H), 1.73 - 1.64 (m, 2H), 1.44 (s, 9H), 1.42 (s, 9H). LC / MS (ESI) m / z: 355 (M+H)+. Step 4: tert-Butyl (3S,6R,8aS)-6-amino-5-oxooctahydroindolizine-3-carboxylate To a solution of tert-butyl (3S,6R,8aS)-6-((tert-butoxycarbonyl)amino)-5-oxooctahydro-indolizine- 3-carboxylate (180 mg, 0.5 mmol) in DCM (2 mL) was added TFA (0.5 mL), and the mixture was stirred at room temperature for 30 minutes. The mixture was basified with aq. NaHCO3to pH 8 and extracted with EtOAc twice. The combined organic layers were dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure to give the title compound (110 mg, yield 85.2%) as a white solid, which was used directly in the next reaction without further purification. LC / MS (ESI) m / z: 255 (M+H)+. Step 5: tert-Butyl (3S,6R,8aS)-5-oxo-6-(5-phenylthiophene-2-carboxamido)octahydro-indolizine-3- carboxylate To a mixture of tert-butyl (3S,6R,8aS)-6-amino-5-oxooctahydroindolizine-3-carboxylate (90 mg, 0.4 mmol) and 5-phenylthiophene-2-carboxylic acid (90 mg, 0.4 mmol) in MeCN (5 mL) was added NMI (88 mg, 1.1 mmol) and TCFH (298 mg, 1.1 mmol), and the mixture was stirred at room temperature for 1 hour. The reaction mixture was diluted with EtOAc, washed with water and brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 0 - 40% EtOAc in PE) to give the title compound (110 mg, yield 70.6%) as a white solid. LC / MS (ESI) m / z: 441 (M+H)+. Step 6: (3S,6R,8aS)-5-Oxo-6-(5-phenylthiophene-2-carboxamido)octahydroindolizine-3-carboxylic acid A solution of tert-butyl (3S,6R,8aS)-5-oxo-6-(5-phenylthiophene-2-carboxamido)octahydro- indolizine-3-carboxylate (110 mg, 0.25 mmol) in HCl / 1,4-dioxane (3 mL) was stirred at room temperature for 30 minutes. The mixture was concentrated under reduced pressure to give the title compound (80 mg, yield 83.3%) as a white solid, which was used directly in the next reaction without further purification. LC / MS (ESI) m / z: 385 (M+H)+. Step 7: (3S,6R,8aS)-N-((1H-Pyrrolo[3,2-c]pyridin-2-yl)methyl)-5-oxo-6-(5-phenylthiophene-2- carboxamido)octahydroindolizine-3-carboxamide (Compound 45) To a mixture of (3S,6R,8aS)-5-oxo-6-(5-phenylthiophene-2-carboxamido)octahydro-indolizine-3- carboxylic acid (80 mg, 0.2 mmol) and (1H-pyrrolo[3,2-c]pyridin-2-yl)-methanamine hydrochloride (55 mg, 0.3 mmol) in DMF (4 mL) was added HBTU (103 mg, 0.3 mmol) and DIPEA (135 mg, 1.0 mmol), and the reaction mixture was stirred at room temperature for 20 minutes. The reaction mixture was concentrated under reduced pressure. The residue was purified by prep-HPLC (C18, 10% - 95% MeCN in water with 0.1% FA) to give Compound 45 (3.6 mg, yield 3.37%) as a white solid.1H NMR (400 MHz, CD3OD) δ 8.93 (s, 1H), 8.21 (d, J = 6.3 Hz, 1H), 7.78 (d, J = 6.4 Hz, 1H), 7.69 (d, J = 5.6 Hz, 3H), 7.46 - 7.41 (m, 3H), 7.38 - 7.34 (m, 1H), 6.90 (s, 1H), 4.81 (s, 1H), 4.53 - 4.44 (m, 3H), 3.79 (t, J = 7.0 Hz, 1H), 2.29 - 2.20 (m, 3H), 2.15 - 2.08 (m, 2H), 2.06 - 2.02 (m, 1H), 1.88 - 1.79 (m, 2H). LC / MS (ESI) m / z: 514 (M+H)+. RT (Method A): 1.35 min. Compound 46 was prepared according to the procedures set forth above using 1-(tert-butyl) 2- methyl (S)-5-oxopyrrolidine-1,2-dicarboxylate as the starting material.1H NMR (400 MHz, CD3OD) δ 8.87 (s, 1H), 8.02 (d, J = 6.4 Hz, 1H), 7.61 (d, J = 6.5 Hz, 1H), 7.60 - 7.58 (m, 1H), 7.58 - 7.56 (m, 2H), 7.43 - 7.40 (m, 2H), 7.38 - 7.35 (m, 1H), 7.26 (d, J = 4.0 Hz, 1H), 6.89 (s, 1H), 4.77 - 4.68 (m, 2H), 4.57 - 4.54 (m, 1H), 4.52 (d, J = 9.2 Hz, 1H), 3.82 - 3.76 (m, 1H), 2.32 - 2.21 (m, 3H), 2.16 - 2.10 (m, 2H), 2.07 - 2.02 (m, 1H), 2.00 - 1.83 (m, 2H). LC / MS (ESI) m / z: 514 (M+H)+. RT (Method A): 1.35 min. Scheme 13. Synthesis of (6S)-3-[(2-Fluoro-3-methoxy-phenyl)methylamino]-4-oxo-N-(1H- pyrrolo[3,2-c]pyridin-2-ylmethyl)-7,8-dihydro-6H-pyrrolo[1,2-a]pyrimidine-6-carboxamide) (Compound 47) To a solution of tert-butyl (2S)-5-oxopyrrolidine-2-carboxylate (10 g, 54 mmol) in DCM (100 mL) was added trimethyloxonium tetrafluoroborate (8 g, 54 mmol). The resulting suspension was stirred for 2 hrs. The reaction was quenched by the addition of saturated aqueous NaHCO3at 0 ˚C. The organic layer was removed, and the aqueous layer was extracted with DCM. The combined organic layers were dried over anhydrous Na2SO4, filtered, and evaporated under reduced pressure to give the title compound (8.5 g, 79% yield). LC / MS: (ESI)+ m / z = 185 [M+H]+. Step 2: tert-Butyl (2S)-5-amino-3,4-dihydro-2H-pyrrole-2-carboxylate Tert-butyl (2S)-5-methoxy-3,4-dihydro-2H-pyrrole-2-carboxylate (10.5 g, 52.7 mmol) was dissolved in MeOH. NH4Cl (3.4 g, 63.2 mmol) was added into the reaction mixture, and it was refluxed for 7 hours. The solvent was evaporated, and the crude mass was dissolved in DCM and filtered. The filtrate was evaporated, and the solid was washed with hexanes. The salt thus obtained was extracted with DCM and washed with saturated Na2CO3 solution to give the title compound (8.9 g, 84%yield) as a white solid, which was used in next step without further purification. Step 3: 6-tert-Butyl-3-methyl (6S)-4-oxo-7,8-dihydro-6H-pyrrolo[1,2-a]pyrimidine-3,6-dicarboxylate A 250 mL round bottom flask was charged with dimethyl 2-(methoxymethylene)propanedioate (10.1 g, 58.0 mmol) and MeOH (100 mL), and the mixture was cooled to -10 ˚C in an acetone / ice bath. Tert-butyl (2S)-5-amino-3,4-dihydro-2H-pyrrole-2-carboxylate (8.8 g, 48 mmol) in MeOH (100 mL) was then added dropwise, and the resulting mixture was allowed to warm to room temperature over 4 hr. Afterwards, the mixture was concentrated in vacuo and subjected to flash chromatography (RediSep Rf Gold silica, 40g, 0-5% MeOH in DCM) to afford the title compound as a yellow solid. LC / MS: (ESI+) m / z = 295 [M+H]+. Step 4: (6S)-6-tert-Butoxycarbonyl-4-oxo-7,8-dihydro-6H-pyrrolo[1,2-a]pyrimidine-3-carboxylic acid A 250 mL round bottom was charged with 6-tert-butyl 3-methyl (6S)-4-oxo-7,8-dihydro-6H- pyrrolo[1,2-a]pyrimidine-3,6-dicarboxylate (7.6 g, 26 mmol) and MeOH (150 ml), and the mixture was cooled to 0 ˚C in a brine / ice bath. LiOH (1.6 g, 39 mmol) in water (30 mL) was added dropwise, and the resulting mixture was warmed to room temperature and stirred overnight. Afterwards, the mixture was concentrated in vacuo and diluted with water. The aqueous mixture was washed with MTBE, and the organic layer was discarded. The pH of the aqueous layer was then adjusted to pH 2 with 1M HCl and extracted with DCM. The organic extract was then dried over Na2SO4, filtered, and concentrated in vacuo to afford the title compound (4.7 g, 65% yield) as a light-orange solid. LC / MS: (ESI+) m / z = 281 [M+H]+. Step 5: tert-Butyl (6S)-3-amino-4-oxo-7,8-dihydro-6H-pyrrolo[1,2-a]pyrimidine-6-carboxylate A 250 mL round bottom flask was charged with (6S)-6-tert-butoxycarbonyl-4-oxo-7,8-dihydro-6H- pyrrolo[1,2-a]pyrimidine-3-carboxylic acid (4.7 g, 16.77 mmol), TEA (2.34 mL, 16.77 mmol), DPPA (3.80 mL, 17.61 mmol), and dioxane, and the mixture was heated to reflux for 4 hours. Water (0.9 mL) was then added, and the resulting mixture was refluxed for an additional 30 minutes. Afterwards, the mixture was cooled to room temperature and concentrated in vacuo. Flash chromatography (Redisep Rf Gold silica, 80g, 0-10% MeOH in DCM) afforded the title compound (1.7 g, 40% yield) as a light-yellow solid. LC / MS: (ESI+) m / z = 252 [M+H]+. Step 6: tert-Butyl (6S)-3-[(2-fluoro-3-methoxy-phenyl)methylamino]-4-oxo-7,8-dihydro-6H-pyrrolo[1,2- a]pyrimidine-6-carboxylate A vial was charged with tert-butyl (6S)-3-amino-4-oxo-7,8-dihydro-6H-pyrrolo[1,2-a]pyrimidine-6- carboxylate (0.03 g, 0.12 mmol), 2-fluoro-3-methoxy-benzaldehyde (0.03 g, 0.18 mmol), DCE, and AcOH (0.007 mL, 0.12 mmol) at room temperature under nitrogen. The mixture was stirred for 30 minutes, and sodium triacetoxyborohydride (0.038 g, 0.18 mmol) was added to the mixture. The reaction mixture was stirred overnight at room temperature. Afterwards, the mixture was diluted in DCM (25 mL), washed with saturated NaHCO3 solution (20 mL) and brine (20 mL), dried over Na2SO4, filtered, and concentrated in vacuo. Flash chromatography (50-70 % EtOAc in hexanes) afforded the title compound (25 mg, 53.8% yield). LC / MS: (ESI+) m / z = 390 [M+H]+. Step 7: (6S)-3-[(2-Fluoro-3-methoxy-phenyl)methylamino]-4-oxo-7,8-dihydro-6H-pyrrolo[1,2-a]pyrimidine- 6-carboxylic acid Tert-Butyl (6S)-3-[(2-fluoro-3-methoxy-phenyl)methylamino]-4-oxo-7,8-dihydro-6H-pyrrolo[1,2- a]pyrimidine-6-carboxylate (0.03 g, 0.064 mmol) was dissolved in DCM (2 mL). TFA (1 mL) was added, and the mixture was allowed to stir at room temperature for 3 hrs. The mixture was evaporated to complete dryness to give the title compound (21 mg, 98% yield), which was used in next step without further purification. LC / MS: (ESI+) m / z = 334 [M+H]+. Step 8: (6S)-3-[(2-Fluoro-3-methoxy-phenyl)methylamino]-4-oxo-N-(1H-pyrrolo[3,2-c]pyridin-2-ylmethyl)- 7,8-dihydro-6H-pyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 47) (6S)-3-[(2-fluoro-3-methoxy-phenyl)methylamino]-4-oxo-7,8-dihydro-6H-pyrrolo[1,2-a]pyrimidine- 6-carboxylic acid (0.021 g, 0.063 mmol), 1H-pyrrolo[3,2-c]pyridin-2-ylmethanamine;dihydrochloride (0.015 g, 0.07 mmol), and DIPEA (0.055 mL, 0.32 mmol) were dissolved in DCM, and the mixture was allowed to cool at 0 ˚C. HATU (0.037 g, 0.095 mmol) was added, and the reaction was stirred at 0 ˚C for 30 minutes. The reaction mixture was washed with saturated NaHCO3, and the layers were separated. The organic layer was dried over Na2SO4and concentrated. The crude mixture was purified using column chromatography (10-20 % MeOH in DCM) to give Compound 47 (15 mg, 52% yield).1H NMR (400 MHz, CDCl3) δ 8.72 (s, 1H), 8.42 (t, J = 5.8 Hz, 1H), 8.16 (d, J = 5.7 Hz, 1H), 7.17 (d, J = 5.9 Hz, 1H), 7.10 – 6.95 (m, 2H), 6.96 – 6.77 (m, 2H), 6.32 (s, 1H), 5.05 (dd, J = 8.8, 2.9 Hz, 1H), 4.82 (s, 1H), 4.63 (dd, J = 15.4, 6.5 Hz, 1H), 4.44 (dd, J = 15.4, 4.9 Hz, 1H), 4.39 – 4.20 (m, 2H), 3.87 (s, 3H), 3.21 (dt, J = 17.0, 9.3 Hz, 1H), 2.90 (ddd, J = 17.4, 9.5, 3.6 Hz, 1H), 2.57 (ddt, J = 12.5, 9.0, 3.2 Hz, 1H), 2.40 – 2.25 (m, 1H). LC / MS: (ESI+) m / z = 463 [M+H]+. RT (Method A): 0.70 min. The following compounds were prepared according to the procedures set forth above, using the appropriate aldehyde in Step 6 and amine in Step 8.

[0005] Compound 194 was also synthesized in according to the procedures set forth above using 1- methylpiperidin-4-one in step 6 and 2-(aminomethyl)thieno[3,2-c]pyridin-6-amine dihydrochloride in step 8 (0.5 mg, 8 %Yield).1H NMR (400 MHz, MeOD) δ 8.37 (s, 1H), 7.13 (d, J = 4.4 Hz, 2H), 6.96 (s, 1H), 5.09 (dd, J = 9.4, 2.9 Hz, 1H), 4.69 – 4.52 (m, 2H), 4.37 (s, 1H), 4.25 (s, 1H), 3.19 (dt, J = 18.2, 9.3 Hz, 1H), 2.99 (ddd, J = 17.1, 9.5, 3.4 Hz, 2H), 2.73 (s, 3H), 2.58 (dq, J = 13.2, 9.4 Hz, 1H), 2.35 – 2.25 (m, 1H), 2.20 (d, J = 14.3 Hz, 2H), 1.73 (s, 1H). LC / MS: (ESI+) m / z = 454 [M+H]+. RT (Method A): 0.26 min. Scheme 14. Synthesis of (S)-N-((1H-Pyrrolo[3,2-c]pyridin-2-yl)methyl)-4-oxo-3-(((2-phenyloxazol-4- yl)methyl)amino)-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 52) Step 1: Methyl (S)-4-oxo-3-(((2-phenyloxazol-4-yl)methyl)amino)-4,6,7,8-tetrahydro-pyrrolo[1,2- a]pyrimidine-6-carboxylate To a mixture of methyl (S)-3-bromo-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6- carboxylate (200 mg, 0.73 mmol) and (2-phenyloxazol-4-yl)methanamine (123 mg, 0.88 mmol) in toluene (5mL) was added Cs2CO3 (717 mg, 2.20 mmol), BrettPhos (40 mg, 0.07 mmol), and Pd2(dba)3 (67 mg, 0.07 mmol) under N2atmosphere, and the reaction mixture was degassed under N2atmosphere for three times and stirred at 80 °C for 4 hours. The mixture was diluted with water and extracted with EtOAc twice. The combined organic layers were washed with brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 0 - 5% MeOH in DCM) and further purified by Chiral SFC (ChiralPak IC, 250 × 20 mm I.D., 5 µm, 40 mL / min, 40% MeOH + 0.1% 7 mol / L NH3 in CO2) to give the title compound (retention time: 3.05 min, 41 mg, yield 15.3%) as a white solid. LC / MS (ESI) m / z: 367 (M+H)+. Step 2: (S)-4-Oxo-3-(((2-phenyloxazol-4-yl)methyl)amino)-4,6,7,8-tetrahydropyrrolo [1,2-a]-pyrimidine-6- carboxylic acid To a solution of methyl (S)-4-oxo-3-(((2-phenyloxazol-4-yl)methyl)amino)-4,6,7,8-tetrahydro- pyrrolo[1,2-a]pyrimidine-6-carboxylate (41.0 mg, 0.111 mmol) in MeOH (3.0 mL) and water (0.5 mL) was added LiOH.H2O (14.0 mg, 0.33 mmol), and the mixture was stirred at 25 °C for 3 hours. The mixture was acidified with 1N aq. HCl to pH 3 and extracted with EtOAc twice. The combined organic layers were washed with brine, dried over anhydrous Na2SO4, filtered, and concentrated to give the title compound (31.0 mg, yield 56.3%) as a white solid. LC / MS (ESI) (m / z): 353 (M+H)+. Step 3: (S)-N-((1H-Pyrrolo[3,2-c]pyridin-2-yl)methyl)-4-oxo-3-(((2-phenyloxazol-4-yl)-methyl)amino)- 4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 52) To a mixture of (S)-4-oxo-3-(((2-phenyloxazol-4-yl)methyl)amino)-4,6,7,8-tetrahydropyrrolo-[1,2- a]pyrimidine-6-carboxylic acid (31 mg, 0.09 mmol) and (1H-pyrrolo[3,2-c]pyridin-2-yl)methanamine hydrochloride (31 mg, 0.17 mmol) in DMF (3 mL) was added DIPEA (68 mg, 0.52 mmol) and HATU (40 mg, 0.10 mmol), and the mixture was stirred at room temperature for 1 hour. The mixture was diluted with EtOAc, washed with water and brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by prep-TLC (DCM: MeOH= 5: 1) and further purified by prep- HPLC (C18, 30% - 70% MeCN in water with 0.1% NH3.H2O) to give Compound 52 (10 mg, yield 23.8%) as a white solid.1H NMR (400 MHz, CD3OD) δ 9.05 (s, 1H), 8.30 (d, J = 6.6 Hz, 1H), 8.07 - 7.96 (m, 2H), 7.93 (d, J = 6.1 Hz, 2H), 7.55 - 7.48 (m, 3H), 7.26 (s, 1H), 7.01 (s, 1H), 5.27 - 5.20 (m, 1H), 4.80 (s, 1H), 4.67 - 4.58 (m, 1H), 4.37 (s, 2H), 3.23 - 3.11 (m, 2H), 2.81 - 2.64 (m, 1H), 2.51 - 2.33 (m, 1H). LC / MS (ESI) (m / z): 482 (M+H)+. RT (Method A): 0.97 min. The following compounds were prepared in accordance with the procedures set forth above.

[0006] aStep 1 was performed with Pd-175 in place of Pd2(dba)3and BrettPhos.bT3P was used in place of HATU in Step 3.cStep 1 was performed with RuPhos Pd G2 in place of Pd2(dba)3.dStep 2 was performed with TBD in MeCN / H2O.dStep 2 was performed in THF / H2O.eBINAP was used in place of BrettPhos in Step 1.fStep3 was performed with TCFH and NMI in MeCN.gStep 1 was performed with Pd2(dba)3and XantPhos in the presence of Cs2CO3 in 1,4-dioxane. Scheme 15. Synthesis of (S)-N-((1H-Pyrrolo[3,2-c]pyridin-2-yl)methyl)-3-(4-fluorophen-ethyl)-4- oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 53) To a mixture of methyl (S)-3-bromo-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6- carboxylate (500 mg, 1.83 mmol) and (E)-2-(4-fluorostyryl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (680 mg, 2.74 mmol) in 1,4-dioxane (5 mL) and water (2 mL) was added K3PO4(1.21 g, 5.49 mmol) and Pd(dtbpf)Cl2 (118 mg, 0.18 mmol) under N2 atmosphere, and the reaction mixture was degassed under N2 atmosphere for three times and stirred at room temperature for 16 hours. The reaction mixture was diluted with EtOAc, washed with water and brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 0 - 80% EtOAc in PE) to give the title compound (300 mg, yield 51.8%) as a white solid. LC / MS (ESI) m / z: 315 (M+H)+. Step 2: Methyl (S)-3-(4-fluorophenethyl)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxylate To a solution of methyl (S,E)-3-(4-fluorostyryl)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6- carboxylate (300 mg, 0.95 mmol) in MeOH (3 mL) was added Pd / C (30 mg, 10% w.t.). The reaction mixture was degassed under N2 atmosphere for three times and stirred under a H2 balloon at room temperature for 4 hours. The mixture was filtered, and the filtrate was concentrated to give the title compound (250 mg, yield 83.0%) as a yellow oil, which was used directly in the next reaction without further purification. LC / MS (ESI) m / z: 317 (M+H)+. Step 3: (S)-3-(4-Fluorophenethyl)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxylic acid To a solution of methyl (S)-3-(4-fluorophenethyl)-4-oxo-4,6,7,8-tetrahydropyrrolo [1,2- a]pyrimidine-6-carboxylate (250 mg, 0.78 mmol) in MeOH (4 mL) and water (2 mL) was added LiOH (49 mg, 1.18 mmol), and the mixture was stirred at room temperature for 2 hours. The mixture was acidified with 1N aq. HCl to pH 3 and extracted with EtOAc twice. The combined organic layers were washed with brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure to give the title compound (200 mg, yield 84.0%) as a yellow solid, which was used directly in the next reaction without further purification. LC / MS (ESI) m / z: 303 (M+H)+. Step 4: (S)-N-((1H-Pyrrolo[3,2-c]pyridin-2-yl)methyl)-3-(4-fluorophenethyl)-4-oxo-4,6,7,8- tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 53) To a mixture of (S)-3-(4-fluorophenethyl)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6- carboxylic acid (50 mg, 0.17 mmol) and (1H-pyrrolo[3,2-c]pyridin-2-yl)methanamine hydrochloride (45 mg, 0.25 mmol) in DMF (3 mL) was added DIPEA (380 mg, 1.02 mmol) and HATU (33 mg, 0.25 mmol), and the reaction mixture was stirred at room temperature for 1 hour. The mixture was concentrated under reduced pressure. The residue was purified by prep-HPLC (C18, 40% - 98% MeCN in water with 0.1% NH4HCO3) and further purified by Chiral SFC (ChiralPak C-IG, 250 × 30 mm I.D., 5 µm, 60 mL / min, 0.01MEA +40% MeOH in CO2) to give Compound 53 (4.2 mg, yield 5.8%) as a yellow solid.1H NMR (400 MHz, CD3OD) δ 9.04 (s, 1H), 8.29 (d, J = 6.7 Hz, 1H), 7.88 (d, J = 6.7 Hz, 1H), 7.65 (s, 1H), 7.18 - 7.13 (m, 2H), 7.03 (s, 1H), 7.00 - 6.93 (m, 2H), 5.21 - 5.12 (m, 1H), 4.83 - 4.81 (m, 1H), 4.68 - 4.58 (m, 1H), 3.25 - 3.20 (m, 1H), 3.16 - 3.10 (m, 1H), 2.89 - 2.82 (m, 2H), 2.79 - 2.70 (m, 2H), 2.68 - 2.61 (m, 1H), 2.36 - 2.25 (m, 1H). LC / MS (ESI) m / z: 432 (M+H)+. RT (Method A): 0.94 min. Scheme 16. Synthesis of (S)-4-Oxo-3-((3-phenylpropyl)amino)-N-(pyrrolo[1,2-a]pyrazin-7- ylmethyl)-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 54) To a mixture of (S)-4-oxo-3-((3-phenylpropyl)amino)-4,6,7,8-tetrahydropyrrolo[1,2-a]-pyrimidine-6- carboxylic acid (35 mg, 0.11 mmol) and pyrrolo[1,2-a]pyrazin-7-ylmethanamine (20 mg, 0.13 mmol) in MeCN (3 mL) was added NMI (55 mg, 0.66 mmol) and TCFH (94 mg, 0.33 mmol), and the mixture was stirred at room temperature for 1 hour. The mixture was diluted with EtOAc, washed with water and brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by prep-TLC (DCM: MeOH= 10: 1) and further purified by prep-HPLC (C18, 40% - 98% MeCN in water with 0.1% NH3.H2O) to give Compound 54 (8.0 mg, yield 16.3%) as a white solid.1H NMR (400 MHz, CD3OD) δ 8.67 (s, 1H), 8.09 (d, J = 4.9 Hz, 1H), 7.68 (s, 1H), 7.36 (d, J = 4.9 Hz, 1H), 7.28 - 7.24 (m, 2H), 7.20 (d, J = 7.1 Hz, 2H), 7.16 (t, J = 7.2 Hz, 1H), 6.96 (s, 1H), 6.89 (s, 1H), 5.10 - 5.06 (m, 1H), 4.63 - 4.58 (m, 1H), 4.52 - 4.48 (m, 1H), 3.19 - 3.12 (m, 1H), 3.11 - 3.07 (m, 2H), 3.00 - 2.93 (m, 1H), 2.72 (t, J = 7.6 Hz, 2H), 2.61 - 2.53 (m, 1H), 2.29 - 2.22 (m, 1H), 1.98 - 1.92 (m, 2H). LC / MS (ESI) (m / z): 443 (M+H)+. RT (Method A): 1.10 min. The following compounds were prepared according to the procedures set forth above. aThe coupling reaction was performed in the presence of NATU and TEA in DMF. Scheme 17. Synthesis of (S)-4-Oxo-3-((3-phenylpropyl)amino)-N-((4,5,6,7-tetrahydro-pyrazolo[1,5- a]pyrazin-2-yl)methyl)-4,6,7,8-tetrahydropyrrolo[1,2-a] pyrimidine-6-carboxamide (Compound 55) To a solution of (4,5,6,7-tetrahydropyrazolo[1,5-a]pyrazin-2-yl)methanol (250 mg, 1.63 mmol) in THF (10 mL) was added (Boc)2O (710 mg, 3.26 mmol) and saturated aq. NaHCO3solution (5 mL), and the reaction mixture was stirred at room temperature for 2 hours. The mixture was diluted with water and extracted with EtOAc twice. The combined organic layers were washed with brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure to give the title compound (400 mg, yield 96.9%) as a light-yellow oil, which was used directly in the next reaction without further purification. LC / MS (ESI) m / z: 254 (M+H)+. Step 2: tert-Butyl 2-(azidomethyl)-6,7-dihydropyrazolo[1,5-a]pyrazine-5(4H)-carboxylate To a solution of tert-butyl 2-(hydroxymethyl)-6,7-dihydropyrazolo[1,5-a]pyrazine-5(4H)-carboxylate (400 mg, 1.58 mmol) in toluene (8 mL) was added DBU (960 mg, 6.32 mmol) and DPPA (1.30 g, 4.74 mmol) at room temperature under N2 atmosphere, and the reaction mixture was stirred at 110 °C for 6 hours. The mixture was diluted with water and extracted with DCM twice. The combined organic layers were washed with brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 0 - 20% EtOAc in PE) to give the title compound (170 mg, yield 38.7%) as a light-yellow oil.1H NMR (400 MHz, CDCl3) δ 5.96 (s, 1H), 4.53 (s, 2H), 4.20 (s, 2H), 4.05 (t, J = 5.4 Hz, 2H), 3.78 (t, J = 5.4 Hz, 2H), 1.38 (s, 9H). Step 3: tert-Butyl 2-(aminomethyl)-6,7-dihydropyrazolo[1,5-a]pyrazine-5(4H)-carboxylate To a solution of tert-butyl 2-(azidomethyl)-6,7-dihydropyrazolo[1,5-a]pyrazine-5(4H)-carboxylate (170 mg, 0.61 mmol) in THF (4 mL) and water (4 mL) was added PPh3(320 mg, 1.22 mmol) at room temperature under N2atmosphere, and the reaction mixture was stirred at 40 °C for 3 hours. The mixture was diluted with water and washed with EtOAc twice. The organic layer was concentrated under reduced pressure to give the title compound (110 mg, yield 71.4%) as a light-yellow oil, which was used directly in the next reaction without further purification. LC / MS (ESI) m / z: 253 (M+H)+. Step 4: tert-Butyl (S)-2-((4-oxo-3-((3-phenylpropyl)amino)-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6- carboxamido)methyl)-6,7-dihydropyrazolo [1,5-a]pyrazine-5(4H)-carboxylate To a mixture of tert-butyl 2-(aminomethyl)-6,7-dihydropyrazolo[1,5-a]pyrazine-5(4H)-carboxylate (40 mg, 0.16 mmol) and (S)-4-oxo-3-((3-phenylpropyl)amino)-4,6,7,8-tetrahydro-pyrrolo[1,2-a]pyrimidine- 6-carboxylic acid (35 mg, 0.11 mmol) in DMF (2 mL) was added DIPEA (60 mg, 0.47 mmol) and HATU (51 mg, 0.13 mmol), and the reaction mixture was stirred at room temperature for 0.5 hour. The mixture was concentrated under reduced pressure and purified by flash chromatography (silica gel, 0 - 5% MeOH in DCM) to give the title compound (50 mg, yield 81.8%) as a light-yellow oil. LC / MS (ESI) m / z: 548 (M+H)+. Step 5: (S)-4-Oxo-3-((3-phenylpropyl)amino)-N-((4,5,6,7-tetrahydropyrazolo[1,5-a]pyrazin-2-yl)methyl)- 4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 55) To a solution of tert-butyl (S)-2-((4-oxo-3-((3-phenylpropyl)amino)-4,6,7,8-tetrahydropyrrolo-[1,2- a]pyrimidine-6-carboxamido)methyl)-6,7-dihydropyrazolo[1,5-a]pyrazine-5(4H)-carboxylate (50 mg, 0.091 mmol) in DCM (4 mL) was added HCl / 1,4-dioxane (1.0 mL, 4 M), and the reaction mixture was stirred at room temperature for 2 hours. The mixture was concentrated under reduced pressure. The residue was purified by prep-HPLC (C18, 20% - 98% MeCN in water with 0.1% NH3.H2O) to give Compound 55 (5.1 mg, yield 12.5%) as a white solid.1H NMR (400 MHz, CD3OD) δ 7.29 - 7.24 (m, 2H), 7.22 - 7.16 (m, 3H), 6.95 (s, 1H), 6.14 (s, 1H), 5.06 (dd, J = 9.2, 9.2 Hz, 1H), 4.37 (s, 2H), 4.18 - 4.14 (m, 4H), 3.44 - 3.40 (m, 2H), 3.12 - 3.06 (m, 3H), 2.99 -2.91 (m, 1H), 2.74 - 2.70 (m, 2H), 2.61 - 2.51 (m, 1H), 2.28 - 2.21 (m, 1H), 1.97 - 1.91 (m, 2H). LC / MS (ESI) m / z: 448 (M+H)+. RT (Method A): 1.02 min. Scheme 18. Synthesis of (S)-4-Oxo-3-((3-phenylpropyl)amino)-N-(thieno[3,2-c]pyridin-2-ylmethyl)- 4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 56) To a mixture of (S)-4-oxo-3-((3-phenylpropyl)amino)-4,6,7,8-tetrahydropyrrolo[1,2-a]-pyrimidine-6- carboxylic acid (35 mg, 0.11 mmol) and thieno[3,2-c]pyridin-2-ylmethanamine (25 mg, 0.15 mmol) in DMF (1 mL) was added DIPEA (72 mg, 0.56 mmol) and HATU (64 mg, 0.17 mmol), and the mixture was stirred at room temperature for 1 hour. The mixture was diluted with EtOAc, washed with water and brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by prep-HPLC (C18, 20% - 95% MeCN in water with 0.1% NH3.H2O) to give Compound 56 (4.2 mg, yield 8.2%) as a white solid.1H NMR (400 MHz, CD3OD) δ 8.97 (s, 1H), 8.31 (d, J = 5.7 Hz, 1H), 7.92 (d, J = 5.4 Hz, 1H), 7.49 (s, 1H), 7.29 - 7.23 (m, 2H), 7.22 - 7.14 (m, 3H), 6.96 (s, 1H), 5.14 - 5.06 (m, 1H), 4.75 - 4.72 (m, 2H), 3.14 - 3.07 (m, 3H), 3.02 - 2.94 (m, 1H), 2.74 - 2.69 (m, 2H), 2.64 - 2.54 (m, 1H), 2.32 - 2.23 (m, 1H), 1.99 - 1.91 (m, 2H). LC / MS (ESI) (m / z): 460 (M+H)+. RT (Method A): 1.21 min. The following compounds were prepared based on the procedures set forth above. Scheme 19. Synthesis of (S)-4-Oxo-3-((3-phenylpropyl)amino)-N-((4,5,6,7-tetrahydro-thieno[3,2- c]pyridin-2-yl)methyl)-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 57) To a mixture of (S)-4-oxo-3-((3-phenylpropyl)amino)-4,6,7,8-tetrahydropyrrolo[1,2-a] pyrimidine-6- carboxylic acid (35 mg, 0.11 mmol) and tert-butyl 2-(aminomethyl)-6,7-dihydrothieno[3,2-c]pyridine-5(4H)- carboxylate (45 mg, 0.17 mmol) in DMF (3 mL) was added DIPEA (87 mg, 0.67 mmol) and HATU (47 mg, 0.12 mmol) under N2 atmosphere, and the mixture was stirred at room temperature for an hour. The mixture was diluted with EtOAc, washed with saturated aq. NaHCO3 solution and brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 0 - 50% EtOAc in PE) to give the title compound (50 mg, yield 79.4%) as a white solid. LC / MS (ESI) m / z: 564 (M+H)+. Step 2: (S)-4-Oxo-3-((3-phenylpropyl)amino)-N-((4,5,6,7-tetrahydrothieno[3,2-c]pyridin-2-yl)methyl)- 4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 57) To a solution of tert-butyl (S)-2-((4-oxo-3-((3-phenylpropyl)amino)-4,6,7,8-tetrahydropyrrolo-[1,2- a]pyrimidine-6-carboxamido)methyl)-6,7-dihydrothieno[3,2-c]pyridine-5(4H)-carboxylate (50 mg, 0.089 mmol) in DCM (2 mL) was added HCl / 1,4-dioxane (1 mL), and the mixture was stirred at room temperature for 0.5 hour. The mixture was concentrated under reduced pressure. The residue was purified by prep-HPLC (C18, 40 - 90% MeCN in water with 0.1% NH3.H2O) to give Compound 57 (5.0 mg, yield 12.1%) as a white solid.1H NMR (400 MHz, CD3OD) δ 7.26 (t, J = 7.4 Hz, 2H), 7.20 (d, J = 7.1 Hz, 2H), 7.16 (t, J = 7.1 Hz, 1H), 6.95 (s, 1H), 6.72 (s, 1H), 5.07 - 5.01 (m, 1H), 4.56 - 4.44 (m, 2H), 3.93 (s, 2H), 3.25 - 3.20 (m, 2H), 3.13 - 3.06 (m, 3H), 2.98 - 2.91 (m, 1H), 2.88 (t, J = 5.1 Hz, 2H), 2.72 (t, J = 7.6 Hz, 2H), 2.59 - 2.49 (m, 1H), 2.25 - 2.17 (m, 1H), 1.98 - 1.91 (m, 2H). LC / MS (ESI) m / z: 464 (M+H)+. RT (Method A): 1.18 min. Compound 58 was prepared according to the procedures set forth above using (S)-4-oxo-3-((3- phenylpropyl)amino)-4,6,7,8-tetrahydro-pyrrolo[1,2-a]pyrimidine-6-carboxylic acid as the starting material.1H NMR (400 MHz, CD3OD) δ 7.27 - 7.14 (m, 5H), 6.95 (s, 1H), 6.71 (s, 1H), 5.03 (dd, J = 9.4, 2.9 Hz, 1H), 4.56 - 4.43 (m, 2H), 3.96 (s, 2H), 3.11 - 3.05 (m, 5H), 2.98 - 2.91 (m, 1H), 2.74 - 2.69 (m, 2H), 2.68 - 2.63 (m, 2H), 2.59 - 2.48 (m, 1H), 2.25 - 2.16 (m, 1H), 1.98 - 1.90 (m, 2H). LC / MS (ESI) m / z: 464 (M+H)+. RT (Method A): 1.16 min. Compound 371 was prepared based on the procedures set forth above using tert-butyl (2- (aminomethyl)thieno[2,3-d]pyridazin-4-yl)carbamate as the starting material and T3P in place of HATU in Step 1.1H NMR (400 MHz, DMSO-d6) δ 9.88 (s, 1H), 9.60 (t, J = 5.9 Hz, 1H), 9.12 (s, 1H), 9.00 (s, 1H), 8.80 (s, 1H), 8.12 - 8.10 (m, 2H), 8.03 (s, 1H), 7.68 - 7.59 (m, 4H), 5.21 - 5.18 (m, 1H), 4.92 - 4.88 (m, 1H), 4.75 - 4.73 (m, 2H), 3.56 (s, 3H), 2.62 - 2.58 (m, 1H), 2.47 - 2.43 (m, 1H). LC / MS (ESI) m / z: 576 (M+H)+. RT (Method A): 1.36 min. Scheme 20. Synthesis of (S)-4-Oxo-3-((3-phenylpropyl)amino)-N-((4,5,6,7-tetrahydro-pyrazolo[1,5- c]pyrimidin-2-yl)methyl)-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 65) To a mixture of (S)-4-oxo-3-((3-phenylpropyl)amino)-4,6,7,8-tetrahydropyrrolo[1,2-a] pyrimidine-6- carboxylic acid (45 mg, 0.14 mmol) in MeCN (0.8 mL) was added tert-butyl 2-(aminomethyl)-4,5- dihydropyrazolo[1,5-c]pyrimidine-6(7H)-carboxylate (40 mg, 0.16 mmol), NMI (34 mg, 0.42 mmol), and TCFH (78 mg, 0.28 mmol), and the mixture was stirred at room temperature for 20 minutes. The mixture was diluted with EtOAc and washed with water and brine. The organic layer was dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 0 - 9% MeOH in DCM) to give the title compound (30 mg, yield 39.2%) as a white solid. Step 2: (S)-4-Oxo-3-((3-phenylpropyl)amino)-N-((4,5,6,7-tetrahydropyrazolo[1,5-c]pyrimidin-2-yl)methyl)- 4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 65) A solution of tert-butyl (S)-2-((4-oxo-3-((3-phenylpropyl)amino)-4,6,7,8-tetrahydropyrrolo-[1,2- a]pyrimidine-6-carboxamido)methyl)-4,5-dihydropyrazolo[1,5-c]pyrimidine-6(7H)-carboxylate (30 mg, 0.055 mmol) in HCl / 1,4-dioxane (2 mL, 4 M) was stirred under N2atmosphere at room temperature for 2 hours. The reaction mixture was concentrated under reduced pressure. The residue was purified by prep- HPLC (C18, 20% - 100% MeCN in water with 0.1% NH3.H2O) to give Compound 65 (8 mg, yield 32.5%) as a white solid.1H NMR (400 MHz, CD3OD) δ 7.28 - 7.24 (m, 2H), 7.20 (d, J = 6.9 Hz, 2H), 7.16 (t, J = 6.9 Hz, 1H), 6.95 (s, 1H), 6.06 (s, 1H), 5.08 - 5.04 (m, 1H), 4.90 (s, 2H), 4.36 (d, J = 1.5 Hz, 2H), 3.18 - 3.12 (m, 1H), 3.10 (d, J = 2.3 Hz, 2H), 3.08 (d, J = 5.8 Hz, 2H), 2.98 - 2.92 (m, 1H), 2.82 (d, J = 6.0 Hz, 2H), 2.71 (d, J = 7.7 Hz, 2H), 2.58 - 2.52 (m, 1H), 2.26 - 2.21 (m, 1H), 1.94 (d, J = 7.2 Hz, 2H). LC / MS (ESI) m / z: 448 (M+H)+. RT (Method A): 1.15 min. The following compounds were prepared based on the procedures set forth above. aStep 2 was performed with TFA in DCM. Scheme 21. Synthesis of (S)-4-Oxo-3-((3-phenylpropyl)amino)-N-(pyrazolo[1,5-a]pyrazin-2- ylmethyl)-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 73) To a solution of ethyl 1H-pyrazole-3-carboxylate (15 g, 107.14 mmol) in MeCN (120 mL) was added Cs2CO3 (52.36 g, 160.71 mmol), followed by a solution of 2-bromo-1,1-diethoxyethane (22.16 g, 112.50 mmol) in MeCN (40 mL), and the reaction mixture was stirred at 82 °C overnight. The mixture was filtered, and the filtrate was concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 0 - 17% EtOAc in PE) to give the title compound (18.7 g, yield 65.8%) as a light-yellow oil.1H NMR (400 MHz, CDCl3) δ 7.47 (d, J = 2.3 Hz, 1H), 6.75 (d, J = 2.3 Hz, 1H), 4.75 (t, J = 5.5 Hz, 1H), 4.37 (q, J = 7.1 Hz, 2H), 4.24 (d, J = 5.5 Hz, 2H), 3.71 - 3.63 (m, 2H), 3.42 - 3.34 (m, 2H), 1.36 (t, J = 7.1 Hz, 3H), 1.12 (t, J = 7.0 Hz, 6H). LC / MS (ESI) m / z: 257 (M+H)+. Step 2: Ethyl 1-(2,2-diethoxyethyl)-5-formyl-1H-pyrazole-3-carboxylate To a solution of ethyl 1-(2,2-diethoxyethyl)-1H-pyrazole-3-carboxylate (18.70 g, 73.05 mmol) in THF (150 mL) was added LDA (54.80 mL, 109.58 mmol, 2.0 M in hexane) dropwise at -78 °C under N2atmosphere, and the mixture was stirred under N2atmosphere at -78 °C for 30 minutes. Subsequently, a solution of DMF (9.60 g, 131.49 mmol) in THF (20 mL) was added dropwise to the above mixture at -78 °C, and the resulting mixture was stirred under N2 atmosphere at room temperature overnight. The mixture was quenched with saturated aq. NH4Cl solution at 0 °C and extracted with EtOAc twice. The combined organic layers were washed with brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 0 - 14% EtOAc in PE) to give the title compound (1.25 g, yield 6.0%) as a yellow oil.1H NMR (400 MHz, CDCl3) δ 9.92 (s, 1H), 7.39 (s, 1H), 4.85 (t, J = 5.7 Hz, 1H), 4.72 (d, J = 5.7 Hz, 2H), 4.43 (q, J = 7.1 Hz, 2H), 3.73 - 3.66 (m, 2H), 3.48 - 3.41 (m, 2H), 1.41 (t, J = 7.1 Hz, 3H), 1.11 (t, J = 7.0 Hz, 6H). Step 3: Ethyl pyrazolo[1,5-a]pyrazine-2-carboxylate A solution of ethyl 1-(2,2-diethoxyethyl)-5-formyl-1H-pyrazole-3-carboxylate (1.25 g, 4.40 mmol) in 2-methyltetrahydrofuran (2.5 mL), TFA (5 mL) and water (2.5 mL) was added stirred at 40 °C for 3 hours. The mixture was concentrated under reduced pressure and evaporated with toluene three times. The residue was dissolved in EtOH (10 mL) and AcOH (798 mg, 13.30 mmol), then NH4OAc (1.02 g, 13.30 mmol) was added. The reaction mixture was stirred at room temperature for 1 hour and concentrated under reduced pressure. The residue was dissolved in 2-methyltetrahydrofuran (24 mL) and water (24 mL), and the mixture was stirred at room temperature for 0.5 hour. The mixture was neutralized with K2CO3 and extracted with EtOAc twice. The combined organic layers were washed with brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 0 - 45% EtOAc in PE) to give the title compound (800 mg, yield 95.2%) as a yellow solid.1H NMR (400 MHz, CDCl3) δ 9.00 (d, J = 4.1 Hz, 1H), 8.31 (t, J = 4.4 Hz, 1H), 7.84 (t, J = 5.1 Hz, 1H), 7.20 (d, J = 4.7 Hz, 1H), 4.37 - 4.28 (m, 2H), 1.34 - 1.26 (m, 3H). LC / MS (ESI) m / z: 192 (M+H)+. Step 4: Pyrazolo[1,5-a]pyrazine-2-carboxylic acid To a solution of ethyl pyrazolo[1,5-a]pyrazine-2-carboxylate (800 mg, 4.19 mmol) in MeCN (16 mL) and water (8 mL) was added TBD (1.16 g, 8.37 mmol) at 0 °C, and the mixture was stirred at room temperature for 2 hours. The reaction mixture was concentrated under reduced pressure to give the title compound (680 mg, yield 99.6%) as a white solid, which was used directly in the next step without further purification. LC / MS (ESI) m / z: 164 (M+H)+. Step 5: N-Methoxy-N-methylpyrazolo[1,5-a]pyrazine-2-carboxamide To a mixture of pyrazolo[1,5-a]pyrazine-2-carboxylic acid (680 mg, 4.17 mmol) and N,O- dimethylhydroxylamine hydrochloride (808 mg, 8.34 mmol) in DMF (10 mL) was added DIPEA (2.15 g, 16.67 mmol) and HATU (2.06g, 5.42 mmol) at 0 °C, and the mixture was stirred at room temperature for 1 hour. The mixture was diluted with EtOAc, washed with water and brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 0 - 2% MeOH in DCM) to give the title compound (300 mg, yield 34.9%) as a light-yellow oil.1H NMR (400 MHz, CDCl3) δ 9.12 (d, J = 1.3 Hz, 1H), 8.41 (d, J = 4.8 Hz, 1H), 7.95 (d, J = 4.8 Hz, 1H), 7.29 (d, J = 0.6 Hz, 1H), 3.80 (s, 3H), 3.49 (s, 3H).LC / MS (ESI) m / z: 207 (M+H)+. Step 6: Pyrazolo[1,5-a]pyrazine-2-carbaldehyde To a solution of N-methoxy-N-methylpyrazolo[1,5-a]pyrazine-2-carboxamide (300 mg, 1.45 mmol) in THF (6 mL) was added DIBAL-H (1.6 mL, 2.40 mmol, 1.5 M in THF) dropwise at -60 °C under N2atmosphere, and the mixture was stirred under N2 atmosphere at -60 °C for 4 hours. The mixture was quenched with saturated aq. potassium sodium tartrate solution at 0 °C and extracted with EtOAc twice. The combined organic layers were washed with brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 0 - 5% MeOH in DCM) to give the title compound (100 mg, yield 46.7%) as a white solid.1H NMR (400 MHz, CDCl3) δ 10.26 (s, 1H), 9.19 (d, J = 1.3 Hz, 1H), 8.45 - 8.39 (m, 1H), 8.03 (d, J = 4.8 Hz, 1H), 7.31 (d, J = 0.7 Hz, 1H). Step 7: (R,Z)-2-Methyl-N-(pyrazolo[1,5-a]pyrazin-2-ylmethylene)propane-2-sulfinamide To a mixture of pyrazolo[1,5-a]pyrazine-2-carbaldehyde (100 mg, 0.68 mmol) and (R)-2- methylpropane-2-sulfinamide (166 mg, 1.37 mmol) in THF (4 mL) was added Ti(OEt)4(465 g, 2.04 mmol) under N2atmosphere, and the reaction mixture was stirred at 60 °C for 2 hours. The mixture was diluted with EtOAc, washed with water and brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 0 - 40% EtOAc in PE) to give the title compound (138 mg, yield 81.2%) as a yellow oil. LC / MS (ESI) m / z: 251 (M+H)+. Step 8: (R)-2-Methyl-N-(pyrazolo[1,5-a]pyrazin-2-ylmethyl)propane-2-sulfinamide (9) To a solution of (R,Z)-2-methyl-N-(pyrazolo[1,5-a]pyrazin-2-ylmethylene)propane-2-sulfinamide (100 mg, 0.40 mmol) in THF (6 mL) was added DIBAL-H (0.44 mL, 0.60 mmol, 1.5 M in THF) dropwise under N2atmosphere at -60 °C, and the mixture was stirred under N2atmosphere at -60 °C for 1 hour. The mixture was quenched with saturated aq. potassium sodium tartrate solution at 0 °C and extracted with EtOAc twice. The combined organic layers were washed with brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure and then purified by flash chromatography (silica gel, 0 - 7% MeOH in DCM) to give the title compound (50 mg, yield 49.6%) as a yellow oil. LC / MS (ESI) m / z: 253 (M+H)+. Step 9: Pyrazolo[1,5-a]pyrazin-2-ylmethanamine hydrochloride (10) To a solution of (R)-2-methyl-N-(pyrazolo[1,5-a]pyrazin-2-ylmethyl)propane-2-sulfinamide (50 mg, 0.20 mmol) in DCM (3 mL) was added HCl / 1,4-dioxane (1 mL, 4 M), and the reaction mixture was stirred under N2 atmosphere at room temperature for 0.5 hour. The reaction mixture was concentrated under reduced pressure to give the title compound (36 mg, yield 98.6%) as a yellow solid, which was used directly in the next step without further purification. LC / MS (ESI) m / z: 149 (M+H)+. Step 10: (S)-4-Oxo-3-((3-phenylpropyl)amino)-N-(pyrazolo[1,5-a]pyrazin-2-ylmethyl) -4,6,7,8- tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 73) To a mixture of pyrazolo[1,5-a]pyrazin-2-ylmethanamine hydrochloride (18 mg, 0.098 mmol) and (S)-4-oxo-3-((3-phenylpropyl)amino)-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxylic acid (15 mg, 0.048 mmol) in MeCN (1 mL) was added NMI (12 mg, 0.15 mmol) and TCFH (40 mg, 0.14 mmol) at 0 °C, and the mixture was stirred at room temperature for 0.5 hour. The mixture was concentrated, and the residue was purified by prep-HPLC (C18, 20% - 98% MeCN in water with 0.1% NH3.H2O) to give Compound 73 (3.2 mg, yield 15.2%) as a white solid.1H NMR (400 MHz, CD3OD) δ 9.04 (d, J = 1.4 Hz, 1H), 8.53 (d, J = 4.8 Hz, 1H), 7.81 (d, J = 4.8 Hz, 1H), 7.28 - 7.23 (m, 2H), 7.21 - 7.15 (m, 3H), 6.96 (d, J = 5.7 Hz, 2H), 5.14 - 5.09 (m, 1H), 4.68 (d, J = 6.2 Hz, 2H), 3.17 - 3.12 (m, 1H), 3.09 (t, J = 6.9 Hz, 2H), 3.01 - 2.93 (m, 1H), 2.71 (t, J = 7.6 Hz, 2H), 2.62 - 2.55 (m, 1H), 2.33 - 2.26 (m, 1H), 1.96 - 1.92 (m, 2H). LC / MS (ESI) (m / z): 444 (M+H)+. RT (Method A): 1.44 min. Scheme 22. Synthesis of (S)-4-Oxo-3-(5-phenylthiophene-2-carboxamido)-N-(thieno[3,2-c]pyridin- 2-ylmethyl)-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 82) To a mixture of methyl (S)-3-amino-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxylate (50 mg, 0.23 mmol) and 5-phenylthiophene-2-carboxylic acid (97 mg, 0.48 mmol) in MeCN (2 mL) was added was added TCFH (200 mg, 0.72 mmol) and NMI (58 mg, 0.72 mmol), and the reaction mixture was stirred at room temperature for 3 hours. The reaction mixture was diluted with EtOAc, washed with water and brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 30 - 60% EtOAc in PE) to give the title compound (25 mg, yield 26.4%) as a white solid. LC / MS (ESI) m / z: 396 (M+H)+. Step 2: (S)-4-Oxo-3-(5-phenylthiophene-2-carboxamido)-4,6,7,8-tetrahydropyrrolo [1,2-a]pyrimidine-6- carboxylic acid To a mixture of methyl (S)-4-oxo-3-(5-phenylthiophene-2-carboxamido)-4,6,7,8-tetrahydro- pyrrolo[1,2-a]pyrimidine-6-carboxylate (25 mg, 0.06 mmol) in MeCN / water (2 mL, v / v= 1 / 1) was added TBD (26 mg, 0.19 mmol) and the mixture was stirred at room temperature for 1 hour. The mixture was acidified with 1N aq. HCl to pH 3 and extracted with EtOAc twice. The combined organic layers were dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure to give the title compound (20 mg, yield 83.3%) as a yellow solid, which was used directly in the next step without further purification. LC / MS (ESI) m / z: 382 (M+H)+. Step 3: (S)-4-Oxo-3-(5-phenylthiophene-2-carboxamido)-N-(thieno[3,2-c]pyridin-2-yl-methyl)-4,6,7,8- tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 82) To a solution of (S)-4-oxo-3-(5-phenylthiophene-2-carboxamido)-4,6,7,8-tetrahydropyrrolo-[1,2- a]pyrimidine-6-carboxylic acid (20 mg, 0.05 mmol) in DMF (1 mL) was added thieno[3,2-c]pyridin-2- ylmethanamine (17 mg, 0.1 mmol), HATU (23 mg, 0.06 mmol), and DIPEA (20 mg, 0.15 mmol), and the reaction mixture was stirred at room temperature for 30 minutes. The mixture was diluted with EtOAc and washed with water and brine. The organic layer was dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by prep-HPLC (C18, 40% - 60% MeCN in water with 0.1% NH3.H2O) to give Compound 82 (8 mg, yield 28.9%) as a white solid.1H NMR (400 MHz, CD3OD) δ 8.98 (s, 1H), 8.79 (s, 1H), 8.31 (d, J = 5.7 Hz, 1H), 7.93 (d, J = 5.7 Hz, 1H), 7.84 (d, J = 4.0 Hz, 1H), 7.73 - 7.70 (m, 2H), 7.50 (s, 1H), 7.47 - 7.42 (m, 3H), 7.39 - 7.35 (m, 1H), 5.20 - 5.16 (m, 1H), 4.76 - 4.74 (m, 2H), 3.27 - 3.23 (m, 1H), 3.16 - 3.10 (m, 1H), 2.72 - 2.63 (m, 1H), 2.37 - 2.30 (m, 1H). LC / MS (ESI) m / z: 528 (M+H)+. RT (Method A): 1.38 min. The following compounds were prepared according to the methods set forth above.

[0007] aStep 2 was performed with LiOH in THF / H2O.bStep 2 was performed with LiOH in MeOH / H2O.cT3P was used in place of HATU in Step 3. Scheme 23. Synthesis of (S)-4-Oxo-3-(((2-phenyloxazol-5-yl)methyl)amino)-N-(thieno[3,2-c]pyridin- 2-ylmethyl)-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 84) To a mixture of methyl (S)-3-amino-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxylate (50 mg, 0.24 mmol) and 2-phenyloxazole-5-carbaldehyde (125 mg, 0.72 mmol) in MeOH (5 mL) was added MgSO4(287 mg, 2.38 mmol) and NaBH3CN (44 mg, 0.71 mmol) under N2atmosphere, and the reaction mixture was stirred under N2 atmosphere at 50 °C for 2 hours. The mixture was filtered, and the filtrate was diluted with EtOAc. The filtrate was washed with water and brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 0 - 5% MeOH in DCM) to give the title compound (70 mg, yield 79.9%) as a colorless oil. LC / MS (ESI) m / z: 367 (M+H)+. Step 2: (S)-4-Oxo-3-(((2-phenyloxazol-5-yl)methyl)amino)-4,6,7,8-tetrahydropyrrolo [1,2-a]-pyrimidine-6- carboxylic acid To a solution of methyl (S)-4-oxo-3-(((2-phenyloxazol-5-yl)methyl)amino)-4,6,7,8-tetrahydro- pyrrolo[1,2-a]pyrimidine-6-carboxylate (70 mg, 0.19 mmol) in MeOH / water (2 mL, v / v= 4 / 1) was added LiOH (14 mg, 0.58 mmol), and the reaction mixture was stirred at room temperature for 2 hours. The mixture was acidified with 1N aq. HCl to pH 3 and extracted with EtOAc twice. The combined organic layers were dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure to give the title compound (60 mg, yield 89.1%) as a yellow solid, which was used directly in the next step without further purification. LC / MS (ESI) m / z: 353 (M+H)+. Step 3: (S)-4-Oxo-3-(((2-phenyloxazol-5-yl)methyl)amino)-N-(thieno[3,2-c]pyridin-2-yl-methyl)-4,6,7,8- tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 84) To a mixture of (S)-4-oxo-3-(((2-phenyloxazol-5-yl)methyl)amino)-4,6,7,8-tetrahydropyrrolo-[1,2- a]pyrimidine-6-carboxylic acid (40 mg, 0.11 mmol) and thieno[3,2-c]pyridin-2-ylmethanamine hydrochloride (28 mg, 0.17 mmol) in DMF (2 mL) was added DIPEA (71 mg, 0.55 mmol) and HATU (50 mg, 0.13 mmol), and the reaction mixture was stirred at room temperature for 1 hour. The mixture was concentrated under reduced pressure. The residue was purified by prep-HPLC (C18, 40 - 60% MeCN in water with 0.1% NH3.H2O) to give the Compound 84 (5.6 mg, yield 9.8%) as a white solid.1H NMR (400 MHz, DMSO-d6) δ 9.15 (t, J = 5.8 Hz, 1H), 9.04 (d, J = 0.8 Hz, 1H), 8.37 (d, J = 5.5 Hz, 1H), 7.98 (d, J = 5.6 Hz, 1H), 7.94 - 7.91 (m, 2H), 7.53 - 7.50 (m, 3H), 7.47 (s, 1H), 7.21 (d, J = 3.6 Hz, 2H), 5.79 (t, J = 6.4 Hz, 1H), 5.01 - 4.98 (m, 1H), 4.61 (d, J = 6.0 Hz, 2H), 4.43 (d, J = 6.3 Hz, 2H), 3.00 - 2.92 (m, 1H), 2.89 - 2.84 (m, 1H), 2.49 - 2.43 (m, 1H), 2.10 - 2.04 (m, 1H). LC / MS (ESI) m / z: 499 (M+H)+. RT (Method A): 0.93 min. The following compounds were prepared according to the methods set forth above.

[0008] aStep 2 was performed with TBD in MeCN / H2O. Scheme 24. Synthesis of (S)-N-((1H-Pyrrolo[3,2-c]pyridin-2-yl)methyl)-3-(((1-(2-fluoro-phenyl)-1H- pyrazol-4-yl)methyl)amino)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrazine-6-carboxamide (Compound 91) Step 1: (E)-N-((1-(2-Fluorophenyl)-1H-pyrazol-4-yl)methylene)-2-methylpropane-2-sulfinamide To a mixture of 1-(2-fluorophenyl)-1H-pyrazole-4-carbaldehyde (450 mg, 2.37 mmol) and 2- methylpropane-2-sulfinamide (717 mg, 5.92 mmol) in THF (10 mL) was added Ti(OEt)4 (2.16 g, 9.48 mmol) under N2 atmosphere at room temperature, the reaction solution was stirred at 90 °C overnight. The mixture was quenched with saturated aq. NH4Cl solution at 0 °C and extracted with EtOAc twice. The combined organic layers were washed with brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 50 - 100% EtOAc in PE) to give the title compound (600 mg, yield 86.3%) as a colorless oil. LC / MS (ESI) m / z: 294 (M+H)+. Step 2: N-((1-(2-Fluorophenyl)-1H-pyrazol-4-yl)methyl)-2-methylpropane-2-sulfinamide To a mixture of (E)-N-((1-(2-fluorophenyl)-1H-pyrazol-4-yl)methylene)-2-methylpropane-2- sulfinamide (250 mg, 0.85 mmol) in MeOH (5.0 mL) was added NaBH4 (76 mg, 2.0 mmol) under N2 atmosphere at room temperature, the reaction mixture was stirred at room temperature for 2 hours. The mixture was quenched with saturated aq. NH4Cl solution and extracted with EtOAc twice. The combined organic layers were washed with brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 50 - 100% EtOAc in PE) to give the title compound (211 mg, yield 84.0%) as a colorless oil. LC / MS (ESI) m / z: 296 (M+H)+. Step 3: (1-(2-Fluorophenyl)-1H-pyrazol-4-yl)methanamine hydrochloride To a solution of N-((1-(2-fluorophenyl)-1H-pyrazol-4-yl)methyl)-2-methylpropane-2-sulfinamide (211 mg, 0.71 mmol) in DCM (2.5 mL) was added HCl / 1,4-dioxane (0.5 mL, 4 M) and the mixture was stirred at room temperature for 1 hour. The mixture was filtered. The solid was dried under vacuum to give the title compound (130 mg, yield 80.4%) as a white solid, which was used directly in the next reaction without further purification. LC / MS (ESI) m / z: 192 (M+H)+. Step 4: 1-(tert-Butyl) 2-methyl (2S)-5-hydroxypyrrolidine-1,2-dicarboxylate To a solution of 1-(tert-butyl) 2-methyl (S)-5-oxopyrrolidine-1,2-dicarboxylate (5.0 g, 20.55 mmol) in THF (50 mL) was added lithium triethylborohydride (41 mL, 41.0 mmol, 1M in THF) dropwise at -78 °C under N2 atmosphere and the mixture was stirred under N2 atmosphere at -78 °C for 3 hours. The mixture was quenched with saturated aq. NH4Cl solution and extracted with EtOAc twice. The combined organic layers were washed with brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 20 - 60% EtOAc in PE) to give the title compound (3.2 g, yield 63.5%) as a colorless oil. Step 5: 1-(tert-Butyl) 2-methyl (2S)-5-methoxypyrrolidine-1,2-dicarboxylate To a mixture of 1-(tert-butyl) 2-methyl (2S)-5-hydroxypyrrolidine-1,2-dicarboxylate (3.2 g, 13.05 mmol) in MeOH (32.0 mL) was added PTSA (2.25 g, 13.05 mmol) under N2 atmosphere at room temperature, and the reaction mixture was stirred at room temperature overnight. The mixture was diluted with EtOAc, washed with saturated aq. NH4Cl solution and brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 0 - 50% EtOAc in PE) to give the title compound (2.5 g, yield 73.9%) as a colorless oil. Step 6: 1-(tert-Butyl) 2-methyl (2S)-5-cyanopyrrolidine-1,2-dicarboxylate To a mixture of 1-(tert-butyl) 2-methyl (2S)-5-methoxypyrrolidine-1,2-dicarboxylate (1.5 g, 5.78 mmol) and TMSCN (1.15 g, 11.56 mmol) in DCM (15 mL) was added BF3.Et2O (7.7 mL, 11.56 mmol) dropwise under N2atmosphere at -10 °C, the reaction solution was stirred at this temperature for 3 hours. The mixture was quenched with saturated aq. NH4Cl solution and extracted with EtOAc twice. The combined organic layers were washed with brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 20 - 50% EtOAc in PE) to give the title compound (1.08 g, yield 73.5%) as a colorless oil. Step 7: Methyl (2S)-5-cyanopyrrolidine-2-carboxylate 2,2,2-trifluoroacetate To a solution of 1-(tert-butyl) 2-methyl (2S)-5-cyanopyrrolidine-1,2-dicarboxylate (900 mg, 3.54 mmol) in DCM (9 mL) was added TFA (1.0 mL). The mixture was stirred at room temperature for 30 minutes. The mixture was concentrated under reduced pressure to give the title compound (938 mg, yield 98.8%) as a white solid, which was used directly in the next reaction without further purification. Step 8: Methyl (S)-1,3-dichloro-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrazine-6-carboxylate To a mixture of methyl (2S)-5-cyanopyrrolidine-2-carboxylate 2,2,2-trifluoroacetate (900 mg, 3.36 mmol) in toluene (10 mL) was added oxalyl chloride (640 mg, 5.04 mmol) dropwise under N2atmosphere at room temperature, and the mixture was stirred at 85 °C for 4 hours. The mixture was concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 40 - 100% EtOAc in PE) to give the title compound (280 mg, yield 31.7%) as a white solid. LC / MS (ESI) m / z: 263 (M+H)+. Step 9: Methyl (S)-1-chloro-3-(((1-(2-fluorophenyl)-1H-pyrazol-4-yl)methyl)amino)-4-oxo-4,6,7,8- tetrahydropyrrolo[1,2-a]pyrazine-6-carboxylate To a mixture of methyl (S)-1,3-dichloro-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrazine-6- carboxylate (200 mg, 0.76 mmol) and (1-(2-fluorophenyl)-1H-pyrazol-4-yl)methanamine hydrochloride (130 mg, 0.57 mmol) in DMF (2.0 mL) was added K2CO3 (210 mg, 1.52 mmol) under N2 atmosphere at room temperature, and the reaction mixture was stirred at room temperature for 4 hours. The mixture was diluted with EtOAc, washed with water and brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 0 - 20% MeOH in DCM) to give the title compound (150 mg, yield 47.2%) as a white solid. LC / MS (ESI) m / z: 418 (M+H)+. Step 10: Methyl (S)-3-(((1-(2-fluorophenyl)-1H-pyrazol-4-yl)methyl)amino)-4-oxo-4,6,7,8- tetrahydropyrrolo[1,2-a]pyrazine-6-carboxylate To a mixture of methyl (S)-1-chloro-3-(((1-(2-fluorophenyl)-1H-pyrazol-4-yl)methyl)amino)-4-oxo- 4,6,7,8-tetrahydropyrrolo[1,2-a]pyrazine-6-carboxylate (130 mg, 0.31 mmol) in EtOH (2.0 mL) was added Pd / C (13 mg, 10% wt.). The mixture was degassed under N2atmosphere for three times and stirred under a H2 balloon at room temperature overnight. The mixture was filtered, and concentrated under reduced pressure to give the title compound (87 mg, yield 73.2%) as a yellow solid. LC / MS (ESI) m / z: 384 (M+H)+. Step 11: (S)-3-(((1-(2-Fluorophenyl)-1H-pyrazol-4-yl)methyl)amino)-4-oxo-4,6,7,8-tetra-hydropyrrolo[1,2- a]pyrazine-6-carboxylic acid To a mixture of methyl (S)-3-(((1-(2-fluorophenyl)-1H-pyrazol-4-yl)methyl)amino)-4-oxo-4,6,7,8- tetrahydropyrrolo[1,2-a]pyrazine-6-carboxylate (85 mg, 0.22 mmol) in MeOH (0.5 mL) and water (0.5 mL) was added LiOH.H2O (28 mg, 0.67 mmol), and the mixture was stirred at room temperature for 2 hours. The mixture was acidified with 1N aq. HCl to pH 4 and extracted with EtOAc twice. The combined organic layers were dried over Na2SO4, filtered, and concentrated under reduced pressure to give the title compound (75 mg, yield 92.3%) as a white solid. LC / MS (ESI) m / z: 370 (M+H)+. Step 12: (S)-N-((1H-Pyrrolo[3,2-c]pyridin-2-yl)methyl)-3-(((1-(2-fluorophenyl)-1H-pyrazol-4- yl)methyl)amino)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrazine-6-carboxamide (Compound 91) To a mixture of (S)-3-(((1-(2-fluorophenyl)-1H-pyrazol-4-yl)methyl)amino)-4-oxo-4,6,7,8- tetrahydropyrrolo[1,2-a]pyrazine-6-carboxylic acid (25 mg, 0.068 mmol) and (1H-pyrrolo-[3,2-c]pyridin-2- yl)methanamine hydrochloride (30 mg, 0.14 mmol) in DMF (1 mL) was added HATU (27 mg, 0.07 mmol) and DIPEA (26 mg, 0.2 mmol) under N2atmosphere, and the mixture was stirred at room temperature for 0.5 hour. The mixture was concentrated. The residue was purified by prep-TLC (DCM: MeOH= 10: 1) and further purified by prep-HPLC (C18, 40 - 98% MeCN in water with 0.1% NH3.H2O) to give Compound 91 (5.1 mg, yield 15.3%) as a white solid.1H NMR (400 MHz, CD3OD) δ 8.69 (s, 1H), 8.09 (d, J = 5.8 Hz, 1H), 8.05 (d, J = 2.6 Hz, 1H), 7.76 - 7.70 (m, 2H), 7.41 - 7.35 (m, 2H), 7.35 - 7.28 (m, 2H), 6.89 (s, 1H), 6.56 (s, 1H), 5.06 - 5.03 (m, 1H), 4.72 - 4.67 (m, 1H), 4.58 - 4.54 (m, 1H), 4.54 - 4.51 (m, 2H), 3.16 - 3.08 (m, 1H), 3.05 - 2.97 (m, 1H), 2.56 - 2.46 (m, 1H), 2.33 - 2.26 (m, 1H). LC / MS (ESI) m / z: 499 (M+H)+. RT (Method A): 0.98 min. Scheme 25. Synthesis of (S)-N-((1H-pyrrolo[3,2-c]pyridin-2-yl)methyl)-3-(((1-(2-fluorophenyl)-1H- pyrazol-4-yl)methyl)amino)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide (Comp Step 1: 1-Ethylpyrrolo[3,2-c]pyridine 1H-Pyrrolo[3,2-c]pyridine (1000 mg, 8.46 mmol) and 2-methyltetrahydrofuran (20 mL) were combined and cooled to 0 °C in a brine / ice bath. NaH (500 mg, 12.5011 mmol) was added, and the resulting mixture was stirred for 30 minutes at 0 °C. Iodoethane (0.800 mL, 9.98 mmol) was then added. After 2 hours at 0 °C, the mixture was quenched with water and extracted with EtOAc. The combined organic extracts were washed with brine, dried over Na2SO4, filtered, and concentrated in vacuo. Flash chromatography (RediSep Rf Gold silica, 40g, 0-20% MeOH in DCM) afforded the title compound (500 mg, 3.42 mmol, 40% yield) as a brown solid. LC / MS: (ESI+) m / z = 147 [M+H]+. Step 2: 1-Ethylpyrrolo[3,2-c]pyridine-2-carbaldehyde 1-Ethylpyrrolo[3,2-c]pyridine (500 mg, 3.42 mmol), THF (15 mL), and TMEDA (0.550 mL, 3.67 mmol) were combined and cooled to -78 ˚C in a dry ice / acetone bath. LDA (2.0M in THF / heptane / ethylbenzene; 2.1 mL, 4.2 mmol) was then added dropwise, and the resulting mixture was stirred for 1 hour at -78 °C. DMF (0.600 mL) was then added dropwise at -78 °C, and the mixture was warmed to 0 °C in a brine / ice bath. After stirring for 1 hour at 0 °C, the mixture was quenched with water (~10 mL). The mixture was then extracted with EtOAc (2 x 50 mL). The combined organic extracts were then washed with brine, dried over Na2SO4, filtered, and concentrated in vacuo to afford the title compound (468 mg, 2.69 mmol, 79% yield) as a red oil. LC / MS: (ESI+) m / z = 175 [M+H]+. Step 3: (NE,R)-N-[(1-Ethylpyrrolo[3,2-c]pyridin-2-yl)methylene]-2-methyl-propane-2-sulfinamide 1-Ethylpyrrolo[3,2-c]pyridine-2-carbaldehyde (468 mg, 2.69 mmol), THF (10 mL), (R)-2- methylpropane-2-sulfinamide (650 mg, 5.36 mmol), and Ti(OEt)4(1.35 mL, 5.43 mmol) were combined and heated to 70 °C for 18 hours. Afterwards, the mixture was cooled to room temperature, decanted into brine, and filtered. The layers were separated, and the aqueous layer was extracted with EtOAc (3 x 15 mL). The combined organics were washed with brine, dried over Na2SO4, filtered, and concentrated in vacuo. Flash chromatography (RediSep Rf Gold silica 24g, 0-30% methanol in DCM) afforded the title compound (750 mg, 2.7 mmol, 100% Yield) as an orange oil. LC / MS: (ESI+) m / z = 278 [M+H]+. Step 4: (R)-N-[(1-Ethylpyrrolo[3,2-c]pyridin-2-yl)methyl]-2-methyl-propane-2-sulfinamide (NE,R)-N-[(1-Ethylpyrrolo[3,2-c]pyridin-2-yl)methylene]-2-methyl-propane-2-sulfinamide (430 mg, 1.550 mmol), MeOH (10 mL), and NaBH4 (150 mg, 3.96 mmol) were combined at 0 °C, and the mixture was allowed to warm to room temperature and stir for 1 hour. Afterwards, the mixture was quenched with water (10 mL) and extracted with EtOAc (3 x 15 mL). The combined organic extracts were dried over Na2SO4, filtered, and concentrated in vacuo to afford the title compound (275 mg, 0.98 mmol, 37% yield) as an orange oil, which was used without further purification. LC / MS: (ESI+) m / z = 280 [M+H]+. Step 5. (1-Ethylpyrrolo[3,2-c]pyridin-2-yl)methanamine dihydrochloride (R)-N-[(1-Ethylpyrrolo[3,2-c]pyridin-2-yl)methyl]-2-methyl-propane-2-sulfinamide (275 mg, 0.98 mmol) and HCl (4.0M in dioxane; 3 mL, 12 mmol) were combined at room temperature, and the mixture was stirred for 1 hour. Afterwards, the mixture was concentrated in vacuo. The white solid was triturated with hexanes (3 x 5 mL) to afford the title compound (211 mg, 0.85 mmol, 86% yield) as a white solid. LC / MS: (ESI+) m / z = 176 [M+H]+. Step 6: (S)-N-((1H-Pyrrolo[3,2-c]pyridin-2-yl)methyl)-3-(((1-(2-fluorophenyl)-1H-pyrazol-4- yl)methyl)amino)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 98) A 20 mL vial was charged with (1-methylpyrrolo[3,2-c]pyridin-2-yl)methanamine dihydrochloride (44 mg, 0.132 mmol), (6S)-3-[[1-(2-fluorophenyl)pyrazol-4-yl]methylamino]-4-oxo-7,8-dihydro-6H- pyrrolo[1,2-a]pyrimidine-6-carboxylic acid (50 mg, 0.135 mmol), DMF (2 mL), and TEA (0.100 mL, 0.753 mmol) and cooled to 0 °C in a brine / ice bath. HATU (75 mg, 0.19725 mmol) was then added, and the resulting mixture was stirred at 0 ˚C for 30 minutes. Afterwards, the mixture was diluted in EtOAc (50 mL), washed with saturated NaHCO3 (20 mL), followed by LiOH solution (0.5% w / v, 2 x 15 mL) and brine (50 mL). The organic layer was then dried over Na2SO4, filtered, and concentrated in vacuo. Flash chromatography (RediSep Rf Gold silica, 12g, 0-50% MeOH in DCM) followed by prep-HPLC (C18, 150 x 21 mm, 5 μM, 5-60% MeCN [0.1% FA] in water [0.1% FA]) and lyophilization afforded Compound 98 (32 mg, 46% yield) as a white solid.1H NMR (400 MHz, DMSO-d6) δ 8.94 (t, J = 5.4 Hz, 1H), 8.76 (s, 1H), 8.21 – 8.14 (m, 2H), 7.80 (d, J = 6.6 Hz, 1H), 7.76 (s, 1H), 7.47 (d, J = 6.3 Hz, 2H), 7.42 – 7.30 (m, 2H), 7.10 (s, 1H), 6.54 (s, 1H), 5.56 (t, J = 6.3 Hz, 1H), 5.01 (dd, J = 9.4, 2.5 Hz, 1H), 4.54 (qd, J = 15.9, 5.5 Hz, 2H), 4.25 – 4.12 (m, 4H), 3.02 – 2.90 (m, 1H), 2.89 – 2.78 (m, 1H), 2.48 – 2.41 (m, 1H), 2.13 – 1.99 (m, 1H), 1.25 (t, J = 7.1 Hz, 3H). LC / MS: (ESI+) m / z = 527 [M+H]+. RT (Method A): 0.69 min. Scheme 26. Synthesis of (S)-3-(((1-(2-Fluorophenyl)-1H-pyrazol-4-yl)methyl)amino)-N-((5-methyl- 5H-pyrrolo[3,2-c]pyridin-2-yl)methyl)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6- carboxamide (Compound 99) Step 1: tert-Butyl ((5-methyl-5H-pyrrolo[3,2-c]pyridin-2-yl)methyl)carbamate Tert-Butyl ((1H-pyrrolo[3,2-c]pyridin-2-yl)methyl)carbamate (1000 mg, 4.05 mmol) and MeTHF (25 mL) were cooled to 4 °C in an ice bath. NaH (60% dispersion in mineral oil;250 mg, 6.08 mmol) was added followed by iodomethane (0.375 mL, 6 mmol), and the mixture was stirred for 2 hours at 4 °C. Afterwards, the reaction was slowly quenched by adding saturated NH4Cl solution (50 mL). The organic layer was separated, washed with brine (100 mL), dried over Na2SO4, filtered, and concentrated in vacuo. Flash chromatography (RediSep Rf Gold silica, 40g, 0-25% MeOH in DCM) afforded the title compound (350 mg, 32% yield) as a white solid. LC / MS: (ESI+) m / z = 262 [M+H]+. Step 2: (5-Methyl-5H-pyrrolo[3,2-c]pyridin-2-yl)methanamine dihydrochloride Tert-Butyl ((5-methyl-5H-pyrrolo[3,2-c]pyridin-2-yl)methyl)carbamate (350 mg, 1.3 mmol) was combined with HCl (4.0M in dioxane) and the mixture was stirred at room temperature for 1 hour. Afterwards, the mixture was concentrated in vacuo to afford the title compound as an off-white solid (250 mg, quant), which was carried forward without further purification. LC / MS: (ESI+) m / z = 162 [M+H]+. Step 3: (S)-3-(((1-(2-Fluorophenyl)-1H-pyrazol-4-yl)methyl)amino)-N-((5-methyl-5H-pyrrolo[3,2-c]pyridin-2- yl)methyl)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 99) A 20 mL vial was charged with (5-methylpyrrolo[3,2-c]pyridin-2-yl)methanamine dihydrochloride (50 mg, 0.215 mmol), (6S)-3-[[1-(2-fluorophenyl)pyrazol-4-yl]methylamino]-4-oxo-7,8-dihydro-6H- pyrrolo[1,2-a]pyrimidine-6-carboxylic acid (50 mg, 0.135 mmol), DMF (2 mL), and TEA (0.100 mL, 0.753 mmol) and cooled to 0 °C in a brine / ice bath. HATU (75 mg, 0.20 mmol) was then added, and the resulting mixture was stirred at 0 °C for 30 minutes. Afterwards, the mixture was diluted with EtOAc (50 mL), washed with saturated NaHCO3(20 mL) followed by LiOH solution (0.5% w / v, 2 x 15 mL) and brine (50 mL). The organic layer was then dried over Na2SO4, filtered, and concentrated in vacuo. Flash chromatography (RediSep Rf Gold silica, 12g, 0-50% MeOH in DCM) followed by prep-HPLC (C18, 150 x 21 mm, 5 μM, 5-60% MeCN [0.1% FA] in water [0.1% FA]) and lyophilization afforded Compound 99 (36 mg, 52 % yield) as a white solid.1H NMR (400 MHz, DMSO-d6) δ 9.21 (t, J = 5.5 Hz, 1H), 9.00 (s, 1H), 8.41 (s, 1H), 8.22 – 8.14 (m, 2H), 7.78 (d, J = 9.1 Hz, 2H), 7.49 – 7.36 (m, 2H), 7.36 – 7.29 (m, 1H), 7.11 (s, 1H), 6.75 (s, 1H), 5.51 (t, J = 6.2 Hz, 1H), 5.04 (dd, J = 9.4, 2.8 Hz, 1H), 4.54 (d, J = 5.6 Hz, 2H), 4.24 (s, 3H), 4.20 (d, J = 6.2 Hz, 2H), 2.99 – 2.89 (m, 1H), 2.88 – 2.77 (m, 1H), 2.48 – 2.40 (m, 1H), 2.09 (s, 1H). LC / MS: (ESI+) m / z = 513 [M+H]+. RT (Method A): 0.74 min. Scheme 27. Synthesis of (S)-4-Oxo-3-(((2-phenyloxazol-5-yl)methyl)amino)-N-(pyrrolo[1,2- a]pyrazin-7-ylmethyl)-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 101) To a mixture of methyl (S)-3-amino-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxylate (50 mg, 0.24 mmol) and 2-phenyloxazole-5-carbaldehyde (82 mg, 0.48 mmol) in MeOH (3 mL) was added NaBH3CN (75 mg, 1.20 mmol) and MgSO4(287 mg, 2.40 mmol) under N2atmosphere, and the reaction mixture was stirred at 50 °C for 2 hours. The mixture was filtered, and the filtrate was diluted with EtOAc, washed with water and brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 0 - 92% EtOAc in PE) to give the title compound (50 mg, yield 57.1%) as a white solid. LC / MS (ESI) m / z: 367 (M+H)+. Step 2: (S)-4-Oxo-3-(((2-phenyloxazol-5-yl)methyl)amino)-4,6,7,8-tetrahydropyrrolo [1,2-a]pyrimidine-6- carboxylic acid To a solution of methyl (S)-4-oxo-3-(((2-phenyloxazol-5-yl)methyl)amino)-4,6,7,8-tetrahydro- pyrrolo[1,2-a]pyrimidine-6-carboxylate (50 mg, 0.14 mmol) in MeCN (3 mL) and water (1 mL) was added TBD (28 mg, 0.21 mmol). The mixture was stirred at room temperature for 30 minutes. The mixture was concentrated under reduced pressure to give the title compound (45 mg, yield 83.3%) as a white solid, which was used directly in the next reaction without further purification. LC / MS (ESI) m / z: 353 (M+H)+. Step 3: (S)-4-Oxo-3-(((2-phenyloxazol-5-yl)methyl)amino)-N-(pyrrolo[1,2-a]pyrazin-7-yl-methyl)-4,6,7,8- tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 101) To a mixture of (S)-4-oxo-3-(((2-phenyloxazol-5-yl)methyl)amino)-4,6,7,8-tetrahydro-pyrrolo[1,2- a]pyrimidine-6-carboxylic acid (45 mg, 0.13 mmol) and pyrrolo[1,2-a]pyrazin-7-ylmethanamine (23 mg, 0.17 mmol) in MeCN (3 mL) was added NMI (63 mg, 0.78 mmol) and TCFH (107 mg, 0.39 mmol), and the reaction mixture was stirred at room temperature for 30 minutes. The mixture was concentrated under reduced pressure. The residue was purified by prep-HPLC (C18, 10~95% MeCN in water with 0.1% NH3.H2O) to give Compound 101 (10 mg, yield 16.4%) as a white solid.1H NMR (400 MHz, DMSO-d6) δ 8.84 (t, J = 5.8 Hz, 1H), 8.75 (s, 1H), 8.22 - 8.20 (m, 1H), 7.94 - 7.91 (m, 2H), 7.67 (s, 1H), 7.53 - 7.50 (m, 3H), 7.43 (d, J = 4.8 Hz, 1H), 7.21 (d, J = 4.8 Hz, 2H), 6.73 (s, 1H), 5.77 (t, J = 6.4 Hz, 1H), 5.00 - 4.96 (m, 1H), 4.44 - 4.39 (m, 4H), 3.01 - 2.92 (m, 1H), 2.87 - 2.80 (m, 1H), 2.47 - 2.42 (m, 1H), 2.09 - 2.03 (m, 1H). LC / MS (ESI) m / z: 482 (M+H)+. RT (Method A): 0.83 min. Compound 103 was prepared according to the methods set forth above, using 1-(2- fluorophenyl)-1H-pyrazole-4-carbaldehyde as the aldehyde in Step 1.1H NMR (400 MHz, CD3OD) δ 8.67 (s, 1H), 8.12 - 8.06 (m, 2H), 7.76 (s, 1H), 7.75 - 7.72 (m, 1H), 7.69 (s, 1H), 7.45 - 7.37 (m, 1H), 7.37 - 7.30 (m, 3H), 7.14 (s, 1H), 6.89 (s, 1H), 5.16 - 5.03 (m, 1H), 4.61 - 4.48 (m, 2H), 4.32 (s, 2H), 3.17 - 3.10 (m, 1H), 2.99 - 2.92 (m, 1H), 2.63 - 2.53 (m, 1H), 2.28 - 2.21 (m, 1H). LC / MS (ESI) m / z: 499 (M+H)+. RT (Method A): 0.85 min. Scheme 28. Synthesis of (6S)-N-((1H-Pyrrolo[3,2-c]pyridin-2-yl)methyl)-8-methoxy-4-oxo-3-(((2- phenyloxazol-4-yl)methyl)amino)-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 104) and (6S)-N-((1H-Pyrrolo[3,2-c]pyridin-2-yl)methyl)-8-hydroxy-4-oxo-3-(((2- phenyloxazol-4-yl)methyl)amino)-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide To a mixture of methyl (S)-3-bromo-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6- carboxylate (1.08 g, 3.95 mmol) in DMF (11 mL) was added Selectfluor (1.68 g, 4.75 mmol), and the mixture was stirred under N2 atmosphere at 90 °C overnight. The mixture was diluted with water and extracted with EtOAc twice. The combined organic layers were dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 10 - 50% EtOAc in PE) to give the title compound (750 mg, yield 65.2%) as a light-yellow oil. LC / MS (ESI) m / z: 291 (M+H)+. Step 2: (6S)-3-Bromo-8-fluoro-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxylic acid To a solution of methyl (6S)-3-bromo-8-fluoro-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]-pyrimidine-6- carboxylate (720 mg, 2.47 mmol) in MeCN / water (8 mL, v / v= 3 / 1) was added TBD (516 mg, 3.71 mmol) and the reaction mixture was stirred at room temperature for 4 hours. The mixture was acidified with 1N aq. HCl to pH 3 and extracted with EtOAc twice. The combined organic layers were dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure to give the title compound (400 mg, yield 58.5%) as a yellow solid, which was used in the next step without further purification. LC / MS (ESI) m / z: 277 (M+H)+. Step 3: tert-Butyl (6S)-3-bromo-8-fluoro-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxylate To a mixture of (6S)-3-bromo-8-fluoro-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6- carboxylic acid (300 mg, 1.08 mmol) and TEA (327 mg, 3.24 mmol) in DCM (3 mL) was added (Boc)2O (706 mg, 3.24 mmol) under N2atmosphere, and the reaction mixture was stirred under N2atmosphere at room temperature overnight. The mixture was diluted water and extracted with EtOAc twice. The combined organic layers were dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 10 - 50% EtOAc in PE) to give the title compound (60 mg, yield 16.7%) as a yellow solid. LC / MS (ESI) m / z: 333 (M+H)+. Step 4: tert-Butyl (6S)-8-fluoro-4-oxo-3-(((2-phenyloxazol-4-yl)methyl)amino)-4,6,7,8- tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxylate To a mixture of tert-butyl (6S)-3-bromo-8-fluoro-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]-pyrimidine- 6-carboxylate (60 mg, 0.18 mmol) and (2-phenyloxazol-4-yl)methanamine (42 mg, 0.24 mmol) in 1,4- dioxane (2 mL) was added K2CO3(74 mg, 0.54 mmol), Brettphos (21 mg, 0.04 mmol), and Pd(OAc)2(5 mg, 0.02 mmol) under N2 atmosphere, and the reaction mixture was stirred under N2 atmosphere at 100 °C for 2 hours. The mixture was filtered, and the filtrate was concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 30 - 75% EtOAc in PE) to give the title compound (10 mg, yield 13.0%) as a yellow oil. LC / MS (ESI) m / z: 427 (M+H)+. Step 5: (6S)-8-Methoxy-4-oxo-3-(((2-phenyloxazol-4-yl)methyl)amino)-4,6,7,8-tetrahydro-pyrrolo[1,2- a]pyrimidine-6-carboxylic acid and (6S)-8-Hydroxy-4-oxo-3-(((2-phenyl-oxazol-4-yl)methyl)amino)-4,6,7,8- tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxylic acid To a solution of tert-butyl (6S)-8-fluoro-4-oxo-3-(((2-phenyloxazol-4-yl)methyl)amino)-4,6,7,8- tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxylate (10 mg, 0.023 mmol) in MeOH / water (0.4 mL, v / v = 1 / 1) was added LiOH (4 mg, 0.1 mmol), and the reaction mixture was stirred at room temperature for 1 hour. The mixture was acidified with 1N aq. HCl to pH 3 and extracted with EtOAc twice. The combined organic layers were dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure to give the mixture of (6S)-8-Methoxy-4-oxo-3-(((2-phenyloxazol-4-yl)methyl)amino)-4,6,7,8-tetrahydro-pyrrolo[1,2- a]pyrimidine-6-carboxylic acid and (6S)-8-Hydroxy-4-oxo-3-(((2-phenyl-oxazol-4-yl)methyl)amino)-4,6,7,8- tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxylic acid (5 mg, yield 59.0%) as a white solid, which was used without further purification. LC / MS (ESI) m / z for (6S)-8-Methoxy-4-oxo-3-(((2-phenyloxazol-4- yl)methyl)amino)-4,6,7,8-tetrahydro-pyrrolo[1,2-a]pyrimidine-6-carboxylic acid: 383 (M+H)+, LC / MS (ESI) m / z for (6S)-8-Hydroxy-4-oxo-3-(((2-phenyl-oxazol-4-yl)methyl)amino)-4,6,7,8-tetrahydropyrrolo[1,2- a]pyrimidine-6-carboxylic acid: 369 (M+H)+. Step 6: (6S)-N-((1H-Pyrrolo[3,2-c]pyridin-2-yl)methyl)-8-methoxy-4-oxo-3-(((2-phenyl-oxazol-4- yl)methyl)amino)-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 104) and (6S)-N- ((1H-Pyrrolo[3,2-c]pyridin-2-yl)methyl)-8-hydroxy-4-oxo-3-(((2-phenyloxazol-4-yl)methyl)amino)-4,6,7,8- tetrahydropyrrolo [1,2-a]pyrimidine-6-carboxamide (Compound 105) To a mixture of compound (6S)-8-Methoxy-4-oxo-3-(((2-phenyloxazol-4-yl)methyl)amino)-4,6,7,8- tetrahydro-pyrrolo[1,2-a]pyrimidine-6-carboxylic acid and compound (6S)-8-Hydroxy-4-oxo-3-(((2-phenyl- oxazol-4-yl)methyl)amino)-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxylic acid (5 mg, 0.013 mmol) and (1H-pyrrolo[3,2-c]pyridin-2-yl)methanamine hydrochloride (17 mg, 0.026 mmol) in DMF (0.1 mL) was added DIPEA (13 mg, 0.1 mmol) and HATU (7 mg, 0.02 mmol), and the reaction mixture was stirred at room temperature for 1 hour. The mixture was concentrated under reduced pressure. The residue was purified by prep-HPLC (C18, 5 - 95% MeCN in water with 0.01% NH3.H2O) to give Compound 104 (0.2 mg, yield 3.0%) and Compound 105 (0.7 mg, yield 10.8%) as white solids. Compound 104:1H NMR (400 MHz, CD3OD) δ 8.81 (s, 1H), 8.15 (d, J = 6.2 Hz, 1H), 8.03 - 7.99 (m, 2H), 7.91 (s, 1H), 7.59 (d, J = 6.6 Hz, 1H), 7.52 - 7.49 (m, 3H), 7.30 (s, 1H), 6.73 (s, 1H), 5.36 - 5.33 (m, 1H), 5.14 - 5.11 (m, 2H), 4.77 - 4.76 (m, 2H), 3.50 (s, 3H), 3.49 - 3.48 (m, 1H), 2.65 - 2.57 (m, 1H), 2.57 - 2.42 (m, 1H). LC / MS (ESI) m / z: 512 (M+H)+. RT (Method A): 1.09 min. Compound 105:1H NMR (400 MHz, CD3OD) δ 9.13 (s, 1H), 8.68 (s, 1H), 8.05 (s, 1H), 8.01 (s, 1H), 7.94 (d, J = 6.0 Hz, 1H), 7.79 (s, 1H), 7.65 - 7.61 (m, 1H), 7.57 - 7.53 (m, 2H), 7.45 (d, J = 5.9 Hz, 1H), 6.57 (s, 1H), 5.17 - 5.14 (m, 1H), 4.78 (s, 2H), 4.58 (s, 2H), 4.55 - 4.50 (m, 1H), 2.70 - 2.62 (m, 1H), 2.39 - 2.30 (m, 1H). LC / MS (ESI) m / z: 498 (M+H)+. RT (Method A): 0.42 min. Scheme 29. Synthesis of (S)-3-(((5-Cyclopropyl-1,3,4-thiadiazol-2-yl)methyl)amino)-4-oxo-N- (pyrrolo-[1,2-a]pyrazin-7-ylmethyl)-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound Step 1: Ethyl To a mixture of cyclopropanecarbohydrazide (3 g, 29.98 mmol) and TEA (9.1 g, 89.95 mmol) in DCM (50 mL) was added ethyl 2-chloro-2-oxoacetate (4.1 g, 29.98 mmol) at 0 °C under N2 atmosphere. The reaction mixture was stirred at room temperature for 2 hours. The mixture was concentrated under reduced pressure and then purified by flash chromatography (silica gel, 0 - 10% MeOH in DCM) to give the title compound (5.3 g, yield 88.4%) as a colorless oil. LC / MS (ESI) m / z: 201 (M+H)+. Step 2: Ethyl 5-cyclopropyl-1,3,4-thiadiazole-2-carboxylate To a solution of ethyl 2-(2-(cyclopropanecarbonyl)hydrazineyl)-2-oxoacetate (5.3 g, 26.49 mmol) in THF (50 mL) was added Lawesson's Reagent (10.7 g, 26.49 mmol), and the reaction mixture was degassed under N2 atmosphere for three times and stirred at room temperature overnight. The mixture was diluted with DCM, washed with water and brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 0 - 20% EtOAc in PE) to give the title compound (3.8 g, yield 72.4%) as a yellow oil. LC / MS (ESI) m / z: 199 (M+H)+. Step 3: (5-Cyclopropyl-1,3,4-thiadiazol-2-yl)methanol To a solution of ethyl 5-cyclopropyl-1,3,4-thiadiazole-2-carboxylate (3.8 g, 19.19 mmol) in EtOH (40 mL) was added NaBH4 (1.5 g, 38.37 mmol) in portions at 0 °C, and the reaction mixture was stirred under N2atmosphere at room temperature for 4 hours. The mixture was quenched with saturated aq. NH4Cl solution and extracted with EtOAc twice. The combined organic layers were washed with water and brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure to give the title compound (2.4 g, yield 80.2%) as a yellow oil, which was used directly in the next reaction without further purification. LC / MS (ESI) m / z: 157 (M+H)+. Step 4: 5-Cyclopropyl-1,3,4-thiadiazole-2-carbaldehyde To a solution of (5-cyclopropyl-1,3,4-thiadiazol-2-yl)methanol (2.2 g, 14.10 mmol) in DCM (30 mL) was added DMP (9 g, 21.15 mmol), and the reaction mixture was stirred at room temperature overnight. The mixture was quenched with saturated aq. Na2S2O3solution, and the mixture was basified with saturated aq. NaHCO3 solution to pH 8 and extracted with DCM twice. The combined organic layers were washed with brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 0 - 30% EtOAc in PE) to give the title compound (1 g, yield 46.1%) as a yellow oil.1H NMR (400 MHz, CDCl3) δ 10.13 (s, 1H), 2.52 - 2.46 (m, 1H), 1.41 - 1.36 (m, 2H), 1.31 - 1.28 (m, 2H). LC / MS (ESI) m / z: 155 (M+H)+. The 5-cyclopropyl-1,3,4-thiadiazole-2-carbaldehyde was used to prepare Compound 106 based on the procedures set forth in, e.g., Scheme 27.1H NMR (400 MHz, CD3OD) δ 8.67 (s, 1H), 8.09 (d, J = 4.9 Hz, 1H), 7.69 (s, 1H), 7.36 (d, J = 4.9 Hz, 1H), 7.09 (s, 1H), 6.89 (s, 1H), 5.10 - 5.06 (m, 1H), 4.70 (s, 2H), 4.63 - 4.58 (m, 1H), 4.52 - 4.48 (m, 1H), 3.18 - 3.09 (m, 1H), 3.00 - 2.92 (m, 1H), 2.61 - 2.53 (m, 1H), 2.42 - 2.37 (m, 1H), 2.28 - 2.21 (m, 1H), 1.25 - 1.21 (m, 2H), 1.03 - 1.00 (m, 2H). LC / MS (ESI) m / z: 463 (M+H)+. RT (Method A): 0.30 min. Scheme 30. Synthesis of (S)-3-(((5-Methyl-1,3,4-thiadiazol-2-yl)methyl)amino)-4-oxo-N-(thieno[3,2- c]pyridin-2-ylmethyl)-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 108) To a solution of ethyl 5-methyl-1,3,4-thiadiazole-2-carboxylate (400 mg, 2.32 mmol) in THF (5 mL) was added DIBAL-H (4.6 mL, 6.97 mmol, 1.5M) at -40 °C under N2atmosphere, and the reaction mixture was stirred at -40 °C for 2 hours. The mixture was quenched with saturated aq. NH4Cl solution and filtered. The filtrate was extracted with DCM twice. The combined organic layers were washed with brine, dried over anhydrous Na2SO4, filtered, and concentrated. The residue was purified by prep-TLC (PE: EtOAc= 1: 1) to give the title compound (70 mg, yield 23.6%) as a yellow oil.1H NMR (400 MHz, CDCl3) δ 10.16 (s, 1H), 2.89 (s, 3H). The 5-methyl-1,3,4-thiadiazole-2-carbaldehyde was used to prepare Compound 108 based on the procedures set forth in, e.g., Scheme 27.1H NMR (400 MHz, CD3OD) δ 8.97 (d, J = 2.8 Hz, 1H), 8.34 - 8.30 (m, 1H), 7.95 - 7.91 (m, 1H), 7.50 (d, J = 2.3 Hz, 1H), 7.10 (d, J = 3.4 Hz, 1H), 5.11 (s, 1H), 4.73 (s, 2H), 4.61 - 4.56 (m, 2H), 3.15 - 3.09 (m, 1H), 3.00 - 2.97 (m, 1H), 2.72 (s, 3H), 2.62 - 2.56 (m, 1H), 2.30 - 2.24 (m, 1H). LC / MS (ESI) m / z: 454 (M+H)+. RT (Method A): 0.24 min. Compound 120 was prepared according to the procedures set forth above starting from Step 2, using 5-phenyl-1,3,4-thiadiazole-2-carbaldehyde as the starting material.1H NMR (400 MHz, CD3OD) δ 8.67 (s, 1H), 8.11 - 8.08 (m, 1H), 7.93 - 7.88 (m, 2H), 7.69 (s, 1H), 7.51 (t, J = 7.3 Hz, 3H), 7.36 (d, J = 4.9 Hz, 1H), 7.18 (s, 1H), 6.89 (s, 1H), 5.11 - 5.08 (m, 1H), 4.62 - 4.49 (m, 4H), 3.16 - 3.09 (m, 1H), 3.01 - 2.94 (m, 1H), 2.60 - 2.54 (m, 1H), 2.27 - 2.21 (m, 1H). LC / MS (ESI) m / z: 499 (M+H)+. RT (Method A): 0.78 min. Scheme 31. Synthesis of (S)-3-(((1-(2-Fluorophenyl)-1H-pyrazol-4-yl)methyl)amino)-N-((1-methyl- 1H-pyrrolo[3,2-c]pyridin-2-yl)methyl)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6- carboxamide (Compound 109) Step 1: tert-Butyl ((1-methyl-1H-pyrrolo[3,2-c]pyridin-2-yl)methyl)carbamate Tert-Butyl N-(1H-pyrrolo[3,2-c]pyridin-2-ylmethyl)carbamate (500 mg, 2.02 mmol), 1,4-dioxane (10 mL), sodium tert-butoxide (250 mg, 2.6 mmol), and methyl p-toluenesulfonate (0.400 mL, 2.56 mmol) were combined at room temperature, and the mixture was stirred for 2 hours. Afterwards, the mixture was diluted in water (~50 mL) and extracted with EtOAc (3 x10 mL). The combined organic extracts were washed with brine, dried over Na2SO4, filtered, and concentrated in vacuo. Flash chromatography (RediSep Rf Gold silica, 24g, 0-30% MeOH in DCM) afforded the title compound (65 mg, 12% Yield) as a colorless residue. LC / MS: (ESI+) m / z = 262 [M+H]+. Step 2: (1-Methylpyrrolo[3,2-c]pyridin-2-yl)methanamine dihydrochloride Tert-Butyl N-[(1-methylpyrrolo[3,2-c]pyridin-2-yl)methyl]carbamate (65 mg, 0.249 mmol) and HCl (4.0M in dioxane) were combined at room temperature, and the mixture was stirred for 1 hour. Afterwards, the mixture was concentrated in vacuo to afford the title compound (58 mg, 99% yield) as a white solid, which was used without further purification. LC / MS: (ESI+) m / z = 162 [M+H]+. Step 3: (S)-3-(((1-(2-fluorophenyl)-1H-pyrazol-4-yl)methyl)amino)-N-((1-methyl-1H-pyrrolo[3,2-c]pyridin-2- yl)methyl)-4-oxo-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 109) A 20 mL vial was charged with (1-methylpyrrolo[3,2-c]pyridin-2-yl)methanamine dihydrochloride (50 mg, 0.149 mmol), (6S)-3-[[1-(2-fluorophenyl)pyrazol-4-yl]methylamino]-4-oxo-7,8-dihydro-6H- pyrrolo[1,2-a]pyrimidine-6-carboxylic acid (50 mg, 0.135 mmol), DMF (2 mL), and TEA (0.100 mL, 0.753 mmol) and cooled to 0 ˚C in a brine / ice bath. HATU (75 mg, 0.197 mmol) was then added, and the resulting mixture was stirred at 0 ˚C for 30 minutes. Afterwards, the mixture was concentrated in vacuo at 55 °C to remove DMF. Flash chromatography (RediSep Rf Gold silica, 12g, 0-50% MeOH in DCM) followed by prep-HPLC (C18, 150 x 21 mm, 5 μM, 5-60% MeCN [0.1% FA] in water [0.1% FA]) and lyophilization afforded Compound 109 (34 mg, 49% yield) as a white solid.1H NMR (400 MHz, DMSO-d6) δ 8.89 (t, J = 5.4 Hz, 1H), 8.76 (s, 1H), 8.19 (d, J = 5.9 Hz, 2H), 7.82 – 7.75 (m, 2H), 7.46 (d, J = 5.9 Hz, 2H), 7.44 – 7.29 (m, 2H), 7.11 (s, 1H), 6.56 (s, 1H), 5.55 (t, J = 6.2 Hz, 1H), 4.99 (dd, J = 9.3, 2.6 Hz, 1H), 4.62 (dd, J = 15.8, 5.9 Hz, 1H), 4.48 (dd, J = 15.8, 4.9 Hz, 1H), 4.20 (d, J = 6.2 Hz, 2H), 3.70 (s, 3H), 3.02 – 2.90 (m, 1H), 2.86 – 2.76 (m, 1H), 2.48 – 2.39 (m, 1H), 2.13 – 2.01 (m, 1H). LC / MS: (ESI+) m / z = 513 [M+H]+. RT (Method A): 0.61 min. Scheme 32. Synthesis of (S)-N-(Imidazo[1,2-c]pyrimidin-2-ylmethyl)-4-oxo-3-((3-phenyl- propyl)amino)-4,6,7,8-tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 110) Compound 110Step 1: 2-(Chloromethyl)-5-(methylthio)imidazo[1,2-c]pyrimidine To a solution of 2-(methylthio)pyrimidin-4-amine (5.0 g, 35.5 mmol) in AcOH (8 mL) was added 1,3-dichloropropan-2-one (6.8 g, 53.2 mmol) and the reaction mixture was stirred under N2 atmosphere at 110 °C overnight. The mixture was concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 0 - 70% EtOAc in PE) to give the title compound (230 mg, yield 3.0%) as a yellow oil. LC / MS (ESI) m / z: 214 (M+H)+. Step 2: 2-(Azidomethyl)-5-(methylthio)imidazo[1,2-c]pyrimidine To a solution of 2-(chloromethyl)-5-(methylthio)imidazo[1,2-c]pyrimidine (230 mg, 1.08 mmol) in DMF (2 mL) was added NaN3 (70 mg, 1.08 mmol) under N2 atmosphere, and the reaction mixture was stirred under N2 atmosphere at room temperature overnight. The mixture was diluted with EtOAc, washed with water and brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, 0 - 80% EtOAc in PE) to give the title compound (180 mg, yield 75.6%) as a yellow oil. LC / MS (ESI) m / z: 221 (M+H)+. Step 3: Imidazo[1,2-c]pyrimidin-2-ylmethanamine To a solution of 2-(azidomethyl)-5-(methylthio)imidazo[1,2-c]pyrimidine (150 mg, 0.68 mmol) in THF (2 mL) was added Pd / C ( 15 mg, 10% wt.) and triethylsilane (237 mg, 2.05 mmol), and the reaction mixture was stirred under N2 atmosphere at room temperature for 16 hours. The mixture was filtered, and the filtrate was concentrated under reduced pressure to give the title compound (80 mg, yield 79.2%) as a colorless oil. LC / MS (ESI) m / z: 149 (M+H)+. Step 4: (S)-N-(Imidazo[1,2-c]pyrimidin-2-ylmethyl)-4-oxo-3-((3-phenylpropyl) amino) -4,6,7,8- tetrahydropyrrolo[1,2-a]pyrimidine-6-carboxamide (Compound 110) To a mixture of (S)-4-oxo-3-((3-phenylpropyl)amino)-4,6,7,8-tetrahydropyrrolo[1,2-a]-pyrimidine-6- carboxylic acid (10 mg, 0.03 mmol) and imidazo[1,2-c]pyrimidin-2-yl-methanamine (5.0 mg, 0.03 mmol) in MeCN (1 mL) was added TCFH (27 mg, 0.09 mmol) and NMI (7 mg, 0.08 mmol), and the reaction mixture was stirred at room temperature for 1 hour. The mixture was concentrated under reduced pressure. The residue was purified by prep-HPLC (YMC-Actus Triart C18250 x 21 mm, 10 - 95% MeCN in water with 0.1% NH3.H2O) to give Compound 110 (2.3 mg, yield 16.4%) as a white solid.1H NMR (400 MHz, CD3OD) δ 9.28 (s, 1H), 7.97 (s, 1H), 7.94 (d, J = 6.5 Hz, 1H), 7.48 (d, J = 6.5 Hz, 1H), 7.27 - 7.23 (m, 2H), 7.21 - 7.14 (m, 3H), 6.97 (s, 1H), 5.13 - 5.09 (m, 1H), 4.67 - 4.62 (m, 1H), 4.58 - 4.52 (m, 1H), 3.20 - 3.13 (m, 1H), 3.11 - 3.08 (m, 2H), 3.02 ...

Claims

Claims 1. A compound of Formula (I):or a pharmaceutically acceptable salt thereof, whereinwherein X1is O, S, C(Ra)2, or NRa, wherein each Rais independently selected from absent, H, C1- C6alkyl, C1-C6haloalkyl, and C3-C6cycloalkyl; X2is N or CRb, wherein Rbis absent or H; each of X3, X4, and X5is independently selected from NRcand C(Rc)2, wherein each Rcis independently selected from absent, H, halo, NH2, NH(C1-C6alkyl), N(C1-C6alkyl)2, and C1-C6alkyl, and only one of X3and X5can be NRcwhen X4is NRc; R3is H or halo; and R4is H, halo, NH2, NH(C1-C6 alkyl), N(C1-C6 alkyl)2, C1-C6 alkyl, or C3-C6 cycloalkyl; and each is independently selected from a single bond and a double bond; each of R1and R1’is independently H, halo, C1-C6alkyl, C1-C6haloalkyl, C1-C6hydroxyalkyl, or (C1-C6 alkoxy)(C1-C6 alkyl); each of R2, R2’, R5, and R5’is independently selected from H; halo; OH, C1-C6 alkyl; C1-C6 haloalkyl; C1-C6hydroxyalkyl; C1-C6alkoxy; C1-C6haloalkoxy; (C1-C6alkoxy)(C1-C6alkyl); OCH2P(O)(ORf)2, wherein each Rfis independently selected from H and C1-C6alkyl; and (4- to 10- membered heterocyclyl)oxy containing 1, 2, or 3 ring atoms independently selected from N, O, and S and optionally substituted with oxo; or R2and R2’, together with the carbon atom to which they are attached, form spirocyclic C3-C8cycloalkyl or 4- to 6-membered spirocyclic heterocycloalkyl containing 1 or 2 oxygen ring atoms; or R2and R5or R2’and R5’, together with the carbon atoms to which each is attached, form cyclopropyl; R6is H or C1-C6alkyl; each of X and X’ is independently selected from N and CRd, wherein Rdis H, halo, C1-C6alkyl, C1- C6 haloalkyl, C1-C6 alkoxy, C1-C6 haloalkoxy, or cyclopropyl; L1is a bond, NH, NHC(O), NHC(O)O, NHC(O)NH, or NHS(O)2; L2is a bond or C1-C6alkylene optionally substituted with one or more substituents independently selected from C1-C6alkyl, C1-C6haloalkyl, C1-C6hydroxyalkyl, (C1-C6alkoxy)(C1-C6alkyl), and oxo; L3is a bond, NH, NHC(O), C(O), O, or S(O)2CH2; and B is C6-C14 aryl; C3-C14 carbocyclyl; 5- to 14-membered heterocyclyl containing 1, 2, or 3 ring atoms independently selected from N, O, and S; or 5- to 10-membered heteroaryl containing 1, 2, or 3ring atoms independently selected from N, O, and S; wherein B is optionally substituted with one or more substituents independently selected from halo; cyano; COORe, wherein Reis H or C1-C6alkyl; S(O)2(C1- C6alkyl); C1-C6alkyl; C1-C6haloalkyl; C1-C6alkoxy; C1-C6haloalkoxy; C6-C14aryl optionally substituted with one or more substituents independently selected from halo, COOH, SF5, S(O)2NH2, S(O)2(C1-C6 alkyl), S(O)(NH)CH3, P(O)(OH)2, P(O)(OH)CH3, C1-C6 alkyl, C1-C6 haloalkyl, C1-C6 alkoxy, C1-C6 haloalkoxy, and C3-C6carbocyclyl; C6-C14aryloxy optionally substituted with one or more halo; C3-C6cycloalkyl optionally substituted with one or more halo; C3-C6cycloalkyloxy optionally substituted with one or more halo; (C3-C8 cycloalkyl)(C1-C6 alkyl); (C6-C14 aryl)(C1-C6 alkyl); 5- to 8-membered heterocyclyl containing 1, 2, or 3 ring atoms independently selected from N, O, and S and optionally substituted with one or more substituents independently selected from C1-C6alkyl, OH, C1-C6hydroxyalkyl, and oxetanyl; 6-membered heteroaryloxy containing 1 or 2 nitrogen ring atoms and optionally substituted with C1-C6alkyl; and 5- or 6-membered heteroaryl containing 1, 2, or 3 ring atoms independently selected from N, O, and S and optionally substituted with one or more substituents selected from halo, C1-C6 alkyl, and C1-C6 haloalkyl; provided that when A is or at least one of the following is true:(i) L1is a bond, NHC(O), NHC(O)O, NHC(O)NH, or NHS(O)2; (ii) L2is a bond or C2-C6 alkylene optionally substituted with one or more substituents independently selected from C1-C6 alkyl, C1-C6 haloalkyl, C1-C6 hydroxyalkyl, (C1-C6 alkoxy)(C1-C6 alkyl), and oxo; (iii) L3is NH, NHC(O), C(O), O, or S(O)2CH2; (iii) at least one of R2, R2’, R5, and R5’is not H; (iv) at least one of R1and R1’is not H; (v) X’ is N; and (vi) B is not2. The compound of claim 1, where the compound is of Formula (I’):or a pharmaceutically acceptable salt thereof.

3. The compound of claim 1 or 2, wherein A isRX.

4. The compound of claim 3, wherein X3is CH or CNH2.

5. The compound of claim 3 or 4, wherein X5is CH.

6. The compound of any one of claims 3-5, wherein X4is N.

7. The compound of any one of claims 3-6, wherein X1is S or NH.

8. The compound of any one of claims 3-7, wherein R3is H and R4is H.

9. The compound of claim 1 or 2, wherein A is selected from:

10. The compound of any one of claims 1-9, wherein R1and R1’are both H.

11. The compound of any one of claims 1-10, wherein R2is H or C1-C6 alkyl.

12. The compound of any one of claims 1-11, wherein R2’is H, C1-C6alkyl, or C1-C6alkoxy.

13. The compound of claim 12, wherein R2’is H, methyl, or methoxy.

14. The compound of any one of claims 1-10, wherein R2and R2’, together with the carbon atom to which they are attached, form spirocyclic C3-C8 cycloalkyl.

15. The compound of any one of claims 1-10, wherein R2and R5or R2’and R5’, together with the carbon atom to which they are attached form cyclopropyl.

16. The compound of any one of claims 1-15, wherein X is N or CH and X’ is N or CH.

17. The compound of any one of claims 1-16, wherein L1is NH or NHC(O).

18. The compound of any one of claims 1-17, wherein L2is a bond or C1-C6 alkylene optionally substituted with C1-C6alkyl or C1-C6hydroxyalkyl.

19. The compound of any one of claims 1-18, wherein L3is a bond.

20. The compound of any one of claims 1-19, wherein B is phenyl optionally substituted with one or more substituents independently selected from halo; cyano; COORe, wherein Reis C1-C6 alkyl; S(O)2(C1-C6 alkyl); C1-C6 alkyl; C1-C6 haloalkyl; C1-C6 alkoxy; C1-C6 haloalkoxy; phenyl optionally substituted with one or more halo; phenoxy; C3-C6cycloalkyl; C3-C6cycloalkyloxy optionally substituted with 1 or 2 halo; 5- to 8-membered heterocyclyl containing 1 or 2 ring atoms independently selected from N and O and optionally substituted with hydroxymethyl or oxetanyl; 5- or 6-membered heteroaryl containing 1, 2, or 3 ring atoms independently selected from N, O, and S and optionally substituted with one or more substituents selected from halo, C1-C6alkyl, C1-C6haloalkyl and cyclopropyl; and -O(pyridyl).

21. The compound of any one of claims 1-19, wherein B is C3-C6 cycloalkyl optionally substituted with phenyl optionally substituted with one or more halo; benzoxazolyl optionally substituted with one or more halo or C1-C6alkyl, -O(pyridyl) optionally substituted with C1-C6alkyl, thiazolopyridinyl, oxazolopyridinyl optionally substituted with C1-C6alkyl, or benzothiazolyl, or phenoxy optionally substituted with one or more halo.

22. The compound of any one of claims 1-19, wherein B is 5- to 14-membered heterocyclyl containing 1 or 2 ring atoms independently selected from O and N and optionally substituted with C1-C6alkyl and further optionally substituted with pyridyl or phenyl optionally substituted with one or more halo.

23. The compound of any one of claims 1-19, wherein B is 5- to 10-membered heteroaryl containing 1, 2, or 3 ring atoms independently selected from N, O, and S; wherein B is optionally substituted with one or more substituents independently selected from halo; C1-C6 alkyl; C1-C6 haloalkyl; C1-C6 alkoxy; phenoxy; phenyl optionally substituted with one or more substituents selected from halo, COOH, S(O)2NH2, S(O)2(C1-C6alkyl), C1-C6alkyl, C1-C6haloalkyl, C1-C6alkoxy, C1-C6haloalkoxy, and C3-C6cycloalkyl; C3-C6carbocyclyl optionally substituted with C1-C6alkyl or halo; (C3-C6cycloalkyl)(C1-C6alkyl); phenyl(C1-C6 alkyl); 5- to 8-membered heterocyclyl containing 1 or 2 ring atoms independently selected from N and O and optionally substituted with halo, OH, C1-C6 alkyl, C1-C6 hydroxyalkyl, and oxetanyl; and 5- or 6-membered heteroaryl containing 1 or 2 ring atoms independently selected from N, O, and S and optionally substituted with one or more substituents independently selected from C1-C6alkyl and halo.

24. The compound of claim 23, wherein B is 6-membered heteroaryl containing 1 or 2 nitrogen ring atoms and optionally substituted with C1-C6alkyl; C1-C6alkoxy; phenoxy; C3-C6cycloalkyl optionally substituted with one or more substituents independently selected from C1-C6 alkyl and halo; 5- to 8-membered heterocyclyl containing one or two nitrogen ring atoms and optionally substituted with one or more substituents independently selected from halo, OH, C1-C6alkyl, C1-C6hydroxyalkyl, and oxetanyl; and 5-membered heteroaryl containing 1 or 2 ring atoms independently selected from N and S.

25. The compound of claim 23, wherein B is 5-membered heteroaryl containing 1, 2, or 3 ring atoms independently selected from N, O, and S and optionally substituted with one or more substituentsindependently selected from halo; C1-C6 alkyl; C1-C6 haloalkyl; C1-C6 alkoxy; phenyl optionally substituted with one or more substituents selected from halo, COOH, S(O)2NH2, S(O)2(C1-C6alkyl), C1-C6alkyl, C1-C6haloalkyl, C1-C6alkoxy, and C3-C6cycloalkyl; C3-C6carbocyclyl; (C3-C6cycloalkyl)(C1-C6alkyl); phenyl(C1- C6 alkyl); 5- or 6-membered heterocyclyl containing 1 or 2 ring atoms independently selected from N and O and optionally substituted with OH; and 5- or 6-membered heteroaryl containing 1 or 2 ring atoms independently selected from N and O and optionally substituted with one or more substituents independently selected from halo and C1-C6alkyl.

26. The compound of claim 23, wherein B is pyridyl optionally substituted with one or more substituents independently selected from halo, C1-C6alkoxy, and C3-C6cycloalkyl.

27. The compound of claim 23, wherein B is 9-membered bicyclic heteroaryl including 1, 2, or 3 heteroatoms independently selected from N, O, and S and optionally substituted with one or more halo.

28. The compound of any one of claims 1-127, wherein R5is H and / or R5’is H, and R6is H.

29. A compound of Table 1, or a pharmaceutically acceptable salt thereof.

30. The compound of any one of claims 1-29, having C1 esterase (C1s) inhibiting activity.

31. A pharmaceutical comprising a compound of any one of claims 1-30 or a pharmaceutically acceptable salt thereof, and a pharmaceutically acceptable excipient.

32. A method of treating a C1s mediated disorder, comprising administering to a subject in need thereof a therapeutically effective amount of a compound of any one of claims 1-30 or a pharmaceutically acceptable salt thereof.

33. A method of inhibiting C1s activity in a subject having a C1s mediated disorder, comprising administering to the subject a therapeutically effective amount of a compound of any one of claims 1-30 or a pharmaceutically acceptable salt thereof.

34. The method of claim 32 or 33, where in the subject is a human.

35. The method of any one of claims 32-34, wherein is the disorder is acute antibody- mediated rejection, amyotrophic lateral sclerosis, autoimmune blistering disease, bullous pemphigoid, chronic inflammatory demyelinating polyneuropathy, geographic atrophy, Guillain-Barré Syndrome, Huntington’s Disease, immune thrombocytopenia purpura, lupus nephritis, multifocal motor neuropathy, rheumatoid arthritis, traumatic brain injury, or warm autoimmune hemolytic anemia.

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