Herbicidal derivatives

Abstract

Compounds of Formula (I), wherein the substituents are as defined in claim 1. The invention further relates to herbicidal compositions which comprise a compound of Formula (I) and to the use of compounds of Formula (I) for controlling weeds, in particular in crops of useful plants.

Description

[0001]109918 / 83165-FF 1 HERBICIDAL DERIVATIVESThe present invention relates to herbicidal pyridone derivatives, e.g., as active ingredients, whichhave herbicidal activity. The invention also relates to agrochemical compositions which comprise at least5 one of the pyridone derivatives, to processes of preparation of these compounds and to uses of thepyridone derivatives or compositions in agriculture or horticulture for controlling weeds, in particular incrops of useful plants. EP0239391, EP0127313, EP0040082, GB2182931, WO 2022 / 117445 and WO2023 / 23267610 describe pyridone derivatives as herbicidal agents.According to the present invention, there is provided a compound of Formula (I): wherein15R1is C1-C6alkyl, C1-C6alkoxy, C2-C6alkenyl, C2-C6alkynyl, C1-C6alkoxyC1-C6alkyl, or C3- C6cycloalkyl; R2 is phenyl or heteroaryl, wherein the heteroaryl moiety is a 5- or 6-membered aromatic ringwhich comprises 1, 2, 3 or 4 heteroatoms individually selected from N, O and S, and wherein each phenyl and heteroaryl moiety may be optionally substituted with 1, 2, 3, or 4 groups, which may be the20 same or different, represented by R7; R3 is hydrogen or C1-C6alkyl;R4is hydrogen, halogen, C1-C6alkyl, or C1-C6haloalkyl; R5 is phenyl or heteroaryl, wherein the heteroaryl moiety is a 5- or 6-membered aromatic ringwhich comprises 1, 2, 3 or 4 heteroatoms individually selected from N, O and S, and wherein each 25 phenyl and heteroaryl moiety may be optionally substituted with 1, 2, 3, or 4 groups, which may be the same or different, represented by R9; R7is cyano, nitro, halogen, C1-C6alkyl, C1-C6alkoxy, C1-C6haloalkyl, C1-C6haloalkoxy, C1- C6alkoxyC1-C6alkyl, C1-C6alkylsulfanyl, C1-C6alkylsulfinyl, C1-C6alkylsulfonyl, C1-C6alkylsulfonamido, C1-C6alkylcarbonyl, C1-C6alkoxycarbonyl, C1-C6alkylaminocarbonyl, C3-C6cycloalkyl, C3-30 C6cycloalkylaminocarbonyl, or N,N-di(C1-C4alkyl)aminocarbonyl; 109918 / 83165-FF 2 R9is cyano, nitro, hydroxy, halogen, C1-C6alkyl, C1-C6alkoxy, C1-C6haloalkyl, C1-C6haloalkoxy, C1-C6alkoxyC1-C6alkyl, C1-C6alkylsulfanyl, C1-C6alkylsulfinyl, C1-C6alkylsulfonyl, C1-C6alkylsulfonamido, C1-C6alkylcarbonyl, C1-C6alkoxycarbonyl, C1-C6alkylaminocarbonyl, C3-C6cycloalkyl, C3- C6cycloalkylaminocarbonyl, N,N-di(C1-C4alkyl)aminocarbonyl, or benzyloxy; or 5 any two adjacent R9groups together with the carbon atoms to which they are attached, may form a C3-C6cycloalkyl ring or phenyl ring, wherein the C3-C6cycloalkyl and phenyl moieties may be optionally substituted with 1, 2, 3 or 4 groups, which may be the same or different, represented by R10; or any two adjacent R9groups together with the carbon atoms to which they are attached, may form a5- or 6-membered heteroaryl ring, wherein the heteroaryl moiety is a 5- or 6-membered aromatic ring10 which comprises 1, 2, 3 or 4 heteroatoms individually selected from N, O and S, and wherein the heteroaryl moiety may be optionally substituted with 1, 2, 3 or 4 groups, which may be the same or different, represented by R10; or any two adjacent R9groups together with the carbon atoms to which they are attached, may form a5- or 6-membered heterocyclyl ring, wherein the heterocyclyl moiety is a 5- or 6-membered comprising15 1 or 2 heteroatoms selected from O and N, and wherein the heterocyclyl ring may be optionally substituted with 1, 2, 3 or 4 groups, which may be the same or different, represented by R10; andR10is halogen, oxo, C1-C3alkyl, or C1-C3alkoxy; or a salt or an N-oxide thereof. 20 A problem with many current herbicides used to control unwanted vegetation before planting a crop is that they can cause damage to the following crop if it is planted soon after the herbicide is used. A herbicide that is safe to crops when applied before they emerge, whilst providing good control on already emerged weeds, is therefore a major advantage over current herbicides.25 Surprisingly, it has been found that the novel compounds of Formula (I) may not only have, forpractical purposes, a very advantageous level of herbicidal activity, but they also shown no or low levels of damage to several major agricultural crops when applied pre-emergence whilst providing exceptional control of unwanted vegetation (weeds and volunteer crops) when applied post-emergence, thus enabling them to be used successfully shortly before planting a new crop. In contrast related compounds30 reported in the prior art, whilst showing similar control of unwanted vegetation, cause unacceptable damage to many crops, thus preventing their use.According to a second aspect of the invention, there is provided an agrochemical composition comprising a herbicidally effective amount of a compound of Formula (I) according to the present35 invention. Such an agricultural composition may further comprise at least one additional active ingredientand / or an agrochemically-acceptable diluent or carrier. 109918 / 83165-FF 3 According to a third aspect of the invention, there is provided a method of controlling weeds at a locus comprising applying to the locus a weed controlling amount of a composition comprising a compound of Formula (I). 5 According to a fourth aspect of the invention, there is provided the use of a compound of Formula (I) as a herbicide. Where substituents are indicated as being “optionally substituted”, this means that they may or may not carry one or more identical or different substituents, e.g., one, two or three R7 substituents. For10 example, C1-C6alkyl substituted by 1, 2 or 3 halogens, may include, but not be limited to, -CH2Cl, -CHCl2,-CCl3, -CH2F, -CHF2, -CF3, -CH2CF3 or -CF2CH3 groups. As another example, C1-C6alkoxy substitutedby 1, 2 or 3 halogens, may include, but not limited to, CH2ClO-, CHCl2O-, CCl3O-, CH2FO-, CHF2O-,CF3O-, CF3CH2O- or CH3CF2O- groups.As used herein, the term “cyano” means a -CN group.15 As used herein, the term "halogen" refers to fluorine (fluoro), chlorine (chloro), bromine (bromo)or iodine (iodo).As used herein, the term "hydroxy" or “hydroxyl" means an -OH group.As used herein, the term “nitro” means an -NO2 group. As used herein, the term “acetyl” means a -C(O)CH3 group. 20 As used herein, =O means an oxo group, e.g., as found in a carbonyl (-C(=O)-) group. As used herein, the term "C1-C6alkyl" refers to a straight or branched hydrocarbon chain radical consisting solely of carbon and hydrogen atoms, containing no unsaturation, having from one to six carbon atoms, and which is attached to the rest of the molecule by a single bond. “C1-C4alkyl” and “C1- C3alkyl” are to be construed accordingly. Examples of C1-C6alkyl include, but are not limited to, methyl,25 ethyl, n-propyl, and the isomers thereof, for example, isopropyl. A “C1-C6alkylene” group refers to thecorresponding definition of C1-C6alkyl, except that such radical is attached to the rest of the molecule by two single bonds. The term “C1-C2alkylene” is to be construed accordingly. Examples of C1-C6alkylene, include, but are not limited to, -CH2-, -CH2CH2- and -(CH2)3-.As used herein, the term “C1-C6haloalkyl” refers a C1-C6alkyl radical as generally defined above30 substituted by one or more of the same or different halogen atoms. The terms “C1-C4haloalkyl” and “C1-C3haloalkyl”, are to be construed accordingly. Examples of C1-C6haloalkyl include, but are not limited totrifluoromethyl. As used herein, the term "C1-C6alkoxy" refers to a radical of the formula -ORa where Ra is a C1- C6alkyl radical as generally defined above. The terms “C1-C4alkoxy” and “C1-C3alkoxy” are to be35 construed accordingly. Examples of C1-C6alkoxy include, but are not limited to, methoxy, ethoxy, 1- methylethoxy (iso-propoxy), and propoxy. As used herein, the term "C1-C6haloalkoxy" refers to a C1-C6alkoxy radical as generally defined above substituted by one or more of the same or different halogen atoms. The terms “C1-C4haloalkoxy” and “C1-C3haloalkoxy”, are to be construed accordingly. Examples of C1-C6haloalkoxy include, but are40 not limited to trifluoromethoxy. 109918 / 83165-FF 4 As used herein, the term "C2-C6alkenyl" refers to a straight or branched hydrocarbon chain radical group consisting solely of carbon and hydrogen atoms, containing at least one double bond that can be of either the (E)- or (Z)-configuration, having from two to six carbon atoms, which is attached to the restof the molecule by a single bond. The term "C2-C3alkenyl" is to be construed accordingly. Examples of5C2-C6alkenyl include, but are not limited to, ethenyl (vinyl), prop-1-enyl, prop-2-enyl (allyl), but-1-enyl. As used herein, the term "C2-C6alkynyl" refers to a straight or branched hydrocarbon chain radical group consisting solely of carbon and hydrogen atoms, containing at least one triple bond, having from two to six carbon atoms, and which is attached to the rest of the molecule by a single bond. The term "C2-C3alkynyl" is to be construed accordingly. Examples of C2-C6alkynyl include, but are not limited to,10 ethynyl, prop-1-ynyl, but-1-ynyl. As used herein, the term “C1-C6alkoxyC1-C6alkyl” refers to a radical of the formula RbORa- whereinRb is a C1-C6alkyl radical as generally defined above, and Ra is a C1-C6alkylene radical as generally defined above. The terms “C1-C4alkoxyC1-C4alkyl” and “C1-C3alkoxyC1-C3alkyl” are to be construedaccordingly. 15 As used herein, the term “C3-C6cycloalkyl” refers to a radical which is a monocyclic saturated ring system and which contains 3 to 6 carbon atoms. The terms "C3-C5cycloalkyl" and "C3-C4cycloalkyl" are to be construed accordingly. Examples of C3-C6cycloalkyl include, but are not limited to, cyclopropyl, cyclobutyl, cyclopentyl, and cyclohexyl.As used herein, the term “C3-C6cycloalkenyl” refers to a radical which is a monocyclic partially 20 unsaturated ring system and which contains 3 to 6 carbon atoms, i.e. wherein the ring comprises one or two double bonds. The terms "C3-C5cycloalkenyl" and "C3-C4cycloalkenyl" are to be construedaccordingly. Examples of C3-C6cycloalkenyl include, but are not limited to, cyclopropenyl, cyclobutenyl, cyclopentenyl, and cyclohexenyl. As used herein, the term “C3-C6cycloalkylaminocarbonyl” refers to a C3-C6cycloalkyl ring attached25 to the rest of the molecule through an -NHC(O)- linker. Examples of C3-C6cycloalkylaminocarbonylinclude, but are not limited to, cyclopropylcarbamoyl (i.e., cyclopropylaminocarbonyl).As used herein, the term “phenylC1-C2alkyl” refers to a phenyl ring attached to the rest of themolecule through a C1-C2alkylene linker as defined above. Examples of phenylC1-C2alkyl include, butare not limited to, benzyl and phenylethyl.30 As used herein, the term “heteroaryl” refers to a 5- or 6-membered aromatic monocyclic ringradical which comprises 1, 2, or 3 heteroatoms individually selected from nitrogen, oxygen, and sulfur.Examples of heteroaryl include, but are not limited to, furanyl, pyrrolyl, thienyl, pyrazolyl, imidazolyl, thiazolyl, isothiazolyl, oxazolyl, isoxazolyl, triazolyl, pyrazinyl, pyridazinyl, pyrimidyl or pyridyl. As used herein, the term “heteroarylC1-C2alkyl” refers to a heteroaryl ring as generally defined35 above attached to the rest of the molecule through a C1-C2alkylene linker as defined above. As used herein, the term “C1-C6alkylcarbonyl” refers to a radical of the formula -C(O)Ra, whereRa is a C1-C6alkyl radical as generally defined above. Examples of C1-C6alkylcarbonyl include, but arenot limited to, acetyl. As used herein, the term “C1-C6alkoxycarbonyl” refers to a radical of the formula -C(O)ORa, where40 Ra is a C1-C6alkyl radical as generally defined above. 109918 / 83165-FF 5 As used herein, the term “C1-C6alkylaminocarbonyl” refers to a radical of the formula -C(O)NHRa,wherein Ra is a C1-C6alkyl radical as generally defined above. Examples of C1-C6alkylaminocarbonylinclude, but are not limited to, ethylcarbamoyl (i.e., ethylaminocarbonyl). As used herein, the term “N,N-di(C1-C4alkyl)amino“ refers to a radical of the formula -N(Ra)(Rb), 5wherein Ra and Rb are each individually a C1-C4alkyl radical as generally defined above. The term “N,N-di(C1-C3alkyl)amino” is to be construed accordingly. As used herein, the term “N,N-di(C1-C4alkyl)aminocarbonyl“ refers to a radical of the formula - C(O)N(Ra)(Rb), wherein Ra and Rb are each individually a C1-C4alkyl radical as generally defined above.The term “N,N-di(C1-C3alkyl)aminocarbonyl” is to be construed accordingly. Examples of N,N-di(C1-10 C4alkyl)aminocarbonyl include, but are not limited to, dimethylcarbamoyl (i.e. N, N-di(methyl)aminocarbonyl). As used herein, the term “C1-C6alkylsulfanyl” refers to a radical of the formula -SRa, where Ra isa C1-C6alkyl radical as generally defined above. The terms “C1-C4alkylsulfanyl” and “C1-C3alkylsulfanyl”,are to be construed accordingly. Examples of C1-C6alkylsulfanyl include, but are not limited to15 methylsulfanyl. As used herein, the term “C1-C6alkylsulfinyl” refers to a radical of the formula -S(O)Ra, where Rais a C1-C6alkyl radical as generally defined above. The terms “C1-C4alkylsulfinyl” and “C1-C3alkylsulfinyl”,are to be construed accordingly. Examples of C1-C6alkylsulfinyl include, but are not limited tomethylsulfinyl.20 As used herein, the term “C1-C6alkylsulfonyl” refers to a radical of the formula -S(O)2Ra, where Rais a C1-C6alkyl radical as generally defined above. The terms “C1-C4alkylsulfonyl” and “C1-C3alkylsulfonyl”, are to be construed accordingly. Examples of C1-C6alkylsolfanyl include, but are notlimited to methylsulfonyl. As used herein, the term “C1-C6alkylsulfonamido” refers to a radical of the formula -NHS(O)2Ra,25 where Ra is a C1-C6alkyl radical as generally defined above.The presence of one or more possible stereogenic elements in a compound of formula (I) meansthat the compounds may occur in optically isomeric forms, i.e., enantiomeric or diastereomeric forms.Also, atropisomers may occur as a result of restricted rotation about a single bond. Formula (I) is30 intended to include all those possible isomeric forms and mixtures thereof. The present invention includes all those possible isomeric forms and mixtures thereof for a compound of formula (I). Likewise, formula (I) is intended to include all possible tautomers. The present invention includes all possibletautomeric forms for a compound of formula (I). In each case, the compounds of formula (I) according to the invention are in free form or in salt35 form, e.g., an agronomically usable salt form. Salts that the compounds of Formula (I) may form withamines, including primary, secondary and tertiary amines (for example ammonia, dimethylamine and triethylamine), alkali metal and alkaline earth metal bases, transition metals or quaternary ammonium bases are preferred. In a particularly preferred set of embodiments, the compounds of Formula (I) mayform chloride or 2,2,2-trifluoroacetate salts.40 The following list provides definitions, including preferred definitions, for substituents R1, R2, R3,R4, R5, R7, R9, and R10, with reference to compounds of Formula (I). For any one of these substituents, 109918 / 83165-FF 6 any of the definitions given below may be combined with any definition of any other substituent given below or elsewhere in this document.R1is C1-C6alkyl, C1-C6alkoxy, C2-C6alkenyl, C2-C6alkynyl, C1-C6alkoxyC1-C6alkyl, or C3- 5C6cycloalkyl. Preferably, R1 is C1-C4alkyl, C1-C4alkoxy, C2-C4alkenyl, C2-C4alkynyl, C1-C4alkoxyC1-C4alkyl, or C3-C6cycloalkyl. More preferably, R1 is C1-C4alkyl, C1-C3alkoxy, C2-C3alkenyl, C2-C3alkynyl,C1-C3alkoxyC1-C3alkyl, or C3-C4cycloalkyl. Even more preferably, R1 is C1-C4alkyl, more preferably stillC1-C3alkyl. In one set of embodiments, R1is methyl, ethyl, n-propyl, allyl, prop-2-ynyl, methoxy, methoxyethyl, or cyclopropyl. In another set of embodiments, R1 is ethyl.10 R2 is phenyl or heteroaryl, wherein the heteroaryl moiety is a 5- or 6-membered aromatic ringwhich comprises 1, 2, 3 or 4 heteroatoms individually selected from N, O and S, and wherein each phenyl and heteroaryl moiety may be optionally substituted with 1, 2, 3, or 4 groups, which may be the same or different, represented by R7. Preferably, R2is phenyl or heteroaryl, wherein the heteroaryl moiety is a 5- or 6-membered aromatic ring which comprises 1, 2, or 3 heteroatoms individually selected15 from N, O and S, and wherein each phenyl and heteroaryl moiety may be optionally substituted with 1, 2, or 3 groups, which may be the same or different, represented by R7. More preferably, R2 is phenyl or heteroaryl, wherein the heteroaryl moiety is a 5- or 6-memberedaromatic ring which comprises 1 or 2 heteroatoms individually selected from N and O, and wherein each phenyl and heteroaryl moiety may be optionally substituted with 1, 2, or 3 groups, which may be the20 same or different, represented by R7. More preferably still, R2 is phenyl or heteroaryl, wherein the heteroaryl moiety is a 5- or 6-membered aromatic ring which comprises 1 or 2 heteroatoms individually selected from N and O, and wherein each phenyl and heteroaryl moiety may be optionally substituted with 1 or 2 groups, which may be the same or different, represented by R7. 25 Even more preferably, R2is phenyl optionally substituted with 1 or 2 groups, which may be the same or different, represented by R7. In one set of embodiments, R2is 3-chloro-4-cyanophenyl, 3,4- dichlorophenyl or 3,4-difluorophenyl, preferably 3,4-dichlorophenyl or 3-chloro-4-cyanophenyl. Morepreferably, R2is 3,4-dichlorophenyl. R3 is hydrogen or C1-C6alkyl. Preferably, R3 is hydrogen or C1-C3alkyl. More preferably, R3 is30 hydrogen or methyl. Most preferably, R3 is hydrogen.R4 is hydrogen, halogen, C1-C6alkyl, or C1-C6haloalkyl. Preferably, R4 is hydrogen, halogen, C1-C3alkyl, or C1-C3haloalkyl. More preferably, R4 is hydrogen or C1-C3alkyl. In one set of embodiments, R4is hydrogen or methyl. In another set of embodiments, R4is hydrogen. R5 is phenyl or heteroaryl, wherein the heteroaryl moiety is a 5- or 6-membered aromatic ring35 which comprises 1, 2, 3 or 4 heteroatoms individually selected from N, O and S, and wherein each phenyl and heteroaryl moiety may be optionally substituted with 1, 2, 3, or 4 groups, which may be the same or different, represented by R9; 109918 / 83165-FF 7 Preferably, R5 is phenyl or heteroaryl, wherein the heteroaryl moiety is a 5- or 6-memberedaromatic ring which comprises 1, 2, or 3 heteroatoms individually selected from N, O and S, and wherein each phenyl and heteroaryl moiety may be optionally substituted with 1, 2, or 3 groups, which may be the same or different, represented by R9. 5More preferably, R5 is phenyl or heteroaryl, wherein the heteroaryl moiety is a 5- or 6-memberedaromatic ring which comprises 1 or 2 heteroatoms individually selected from N and O, and wherein eachphenyl and heteroaryl moiety may be optionally substituted with 1, 2, or 3 groups, which may be the same or different, represented by R9. Even more preferably, R5 is phenyl or heteroaryl, wherein the heteroaryl moiety is a 5- or 6-10 membered aromatic ring which comprises 1 or 2 nitrogen atoms, and wherein each phenyl andheteroaryl moiety may be optionally substituted with 1 or 2 groups, which may be the same or different,represented by R9. Even more preferably still, R5 is phenyl, pyridyl, or pyrazolyl, wherein each phenyl, pyridyl ,andpyrazolyl moiety may be optionally substituted with 1 or 2 groups, which may be the same or different,15 represented by R9. In a more preferable embodiment, R5is 1-methylpyrazol-3-yl, 2-fluorophenyl, 3-fluorophenyl, 4- fluorophenyl, 3,4-difluorophenyl, 3,5-difluorophenyl, 3-chlorophenyl, 4-chlorophenyl, 2,4-dichlorophenyl,3,4-dichlorophenyl, 3,5-dichlorophenyl, 4-methylphenyl, 4-methoxyphenyl, 4-trifluoromethylphenyl, 4-trifluoromethoxyphenyl, 4-cyclopropylphenyl, 4-methylsulfonylphenyl, 3,4-dimethoxyphenyl, 3-chloro-5-20 methoxyphenyl, 4-chloro-2-methoxyphenyl, 4-chloro-2-fluorophenyl, 2-chloro-5-fluorophenyl, 3-fluoro-4-methylphenyl, 4-methyl-3-(trifluoromethyl)phenyl, 2-fluoro-3-pyridyl, 6-fluoro-3-pyridyl, 5-chloro-2-pyridyl, 5-chloro-3-pyridyl, 6-chloro-2-pyridyl, 2-chloro-4-pyridyl, 3,5-difluoro-2-pyridyl, or 6-methyl-2-pyridyl. In a particularly preferred embodiment, R5is 1-methylpyrazol-3-yl, 2-fluorophenyl, 3-fluorophenyl,25 4-fluorophenyl, 3,4-difluorophenyl, 3-chlorophenyl, 4-chlorophenyl, 3,4-dichlorophenyl, 3- trifluoromethylphenyl, 4-chloro-2-fluorophenyl, 6-fluoro-3-pyridyl, or 6-chloro-2-pyridyl.R7is cyano, nitro, halogen, C1-C6alkyl, C1-C6alkoxy, C1-C6haloalkyl, C1-C6haloalkoxy, C1- C6alkoxyC1-C6alkyl, C1-C6alkylsulfanyl, C1-C6alkylsulfinyl, C1-C6alkylsulfonyl, C1-C6alkylsulfonamido, C1-C6alkylcarbonyl, C1-C6alkoxycarbonyl, C1-C6alkylaminocarbonyl, C3-C6cycloalkyl, C3- 30 C6cycloalkylaminocarbonyl, or N,N-di(C1-C4alkyl)aminocarbonyl. Preferably, R7is cyano, nitro, halogen, C1-C4alkyl, C1-C4alkoxy, C1-C4haloalkyl, C1-C4haloalkoxy, C1-C4alkoxyC1-C3alkyl, C1-C4alkylsulfanyl, C1-C4alkylsulfinyl, C1-C4alkylsulfonyl, C1-C4alkylsulfonamido, C1-C4alkylcarbonyl, C1-C4alkoxycarbonyl, C1-C4alkylaminocarbonyl, C3-C6cycloalkyl, C3- C6cycloalkylaminocarbonyl, or N,N-di(C1-C3alkyl)aminocarbonyl. 35 More preferably, R7is cyano, nitro, halogen, C1-C3alkyl, C1-C3alkoxy, C1-C3haloalkyl, C1- C3haloalkoxy, C1-C3alkoxyC1-C3alkyl, C1-C3alkylsulfanyl, C1-C3alkylsulfinyl, C1-C3alkylsulfonyl, C1- 109918 / 83165-FF 8 C3alkylsulfonamido, C1-C3alkylcarbonyl, C1-C3alkoxycarbonyl, C1-C3alkylaminocarbonyl, C3- C6cycloalkyl, C3-C6cycloalkylaminocarbonyl, or N,N-di(C1-C3alkyl)aminocarbonyl. More preferably still, R7is cyano, nitro, halogen, C1-C3alkyl, C1-C3alkoxy, C1-C3haloalkyl, C1- C3haloalkoxy, C1-C3alkoxyC1-C3alkyl, C1-C3alkylcarbonyl, or C3-C6cycloalkyl. Even more preferably, R75 is cyano, nitro, chloro, fluoro, methyl, isopropyl, methoxy, ethoxy, isopropoxy, trifluoromethyl, trifluoromethoxy, difluoromethoxy, 2,2-difluoroethoxy, methoxymethyl, acetyl, or cyclopropyl. In one set of embodiments, R7is cyano, nitro, or halogen, preferably cyano or halogen, more preferably halogen, and more preferably still, R7 is chloro or fluoro. In one set of embodiments, R7 iscyano or chloro. 10 R9is cyano, nitro, hydroxy, halogen, C1-C6alkyl, C1-C6alkoxy, C1-C6haloalkyl, C1-C6haloalkoxy, C1-C6alkoxyC1-C6alkyl, C1-C6alkylsulfanyl, C1-C6alkylsulfinyl, C1-C6alkylsulfonyl, C1-C6alkylsulfonamido, C1-C6alkylcarbonyl, C1-C6alkoxycarbonyl, C1-C6alkylaminocarbonyl, C3-C6cycloalkyl, C3- C6cycloalkylaminocarbonyl, N,N-di(C1-C4alkyl)aminocarbonyl, or benzyloxy; or any two adjacent R9groups together with the carbon atoms to which they are attached, may form 15 a C3-C6cycloalkyl ring or phenyl ring, wherein the C3-C6cycloalkyl and phenyl moieties may be optionally substituted with 1, 2, 3 or 4 groups, which may be the same or different, represented by R10; or any two adjacent R9groups together with the carbon atoms to which they are attached, may form a5- or 6-membered heteroaryl ring, wherein the heteroaryl moiety is a 5- or 6-membered aromatic ringwhich comprises 1, 2, 3 or 4 heteroatoms individually selected from N, O and S, and wherein the 20 heteroaryl moiety may be optionally substituted with 1, 2, 3 or 4 groups, which may be the same or different, represented by R10; or any two adjacent R9groups together with the carbon atoms to which they are attached, may form a5- or 6-membered heterocyclyl ring, wherein the heterocyclyl moiety is a 5- or 6-membered comprising1 or 2 heteroatoms selected from O and N, and wherein the heterocyclyl ring may be optionally25 substituted with 1, 2, 3 or 4 groups, which may be the same or different, represented by R10. Preferably, R9is cyano, nitro, hydroxy, halogen, C1-C6alkyl, C1-C6alkoxy, C1-C6haloalkyl, C1- C6haloalkoxy, C1-C4alkoxyC1-C4alkyl, C1-C3alkylsulfanyl, C1-C3alkylsulfinyl, C1-C3alkylsulfonyl, C1- C3alkylsulfonamido, C1-C4alkylcarbonyl, C1-C4alkoxycarbonyl, C1-C4alkylaminocarbonyl, C3- C6cycloalkyl, C3-C6cycloalkylaminocarbonyl, N,N-di(C1-C3alkyl)aminocarbonyl, or benzyloxy; or 30 any two adjacent R9groups together with the carbon atoms to which they are attached, may form a C3-C6cycloalkyl ring or phenyl ring, wherein the C3-C6cycloalkyl and phenyl moieties may be optionally substituted with 1, 2, or 3 groups, which may be the same or different, represented by R10; or any two adjacent R9groups together with the carbon atoms to which they are attached, may form a5- or 6-membered heteroaryl ring, wherein the heteroaryl moiety is a 5- or 6-membered aromatic ring35 which comprises 1, 2, or 3 heteroatoms individually selected from N, O and S, and wherein the heteroaryl 109918 / 83165-FF 9 moiety may be optionally substituted with 1, 2, or 3 groups, which may be the same or different,represented by R10; or any two adjacent R9groups together with the carbon atoms to which they are attached, may form a5- or 6-membered heterocyclyl ring, wherein the heterocyclyl moiety is a 5- or 6-membered comprising5 1 or 2 heteroatoms selected from O and N, and wherein the heterocyclyl ring may be optionally substituted with 1, 2, or 3 groups, which may be the same or different, represented by R10. More preferably, R9is cyano, nitro, hydroxy, halogen, C1-C4alkyl, C1-C4alkoxy, C1-C4haloalkyl, C1- C4haloalkoxy, C1-C3alkoxyC1-C3alkyl, C1-C3alkylsulfanyl, C1-C3alkylsulfinyl, C1-C3alkylsulfonyl, C1- C3alkylsulfonamido, C1-C3alkylcarbonyl, C1-C3alkoxycarbonyl, C1-C3alkylaminocarbonyl, C3-10 C4cycloalkyl, C3-C4cycloalkylaminocarbonyl, N,N-di(C1-C3alkyl)aminocarbonyl, or benzyloxy. Even more preferably, R9is cyano, nitro, hydroxy, halogen, C1-C4alkyl, C1-C4alkoxy, C1- C3haloalkyl, C1-C3haloalkoxy, C1-C2alkoxyC1-C2alkyl, C1-C2alkylsulfanyl, C1-C2alkylsulfinyl, C1- C2alkylsulfonyl, C1-C2alkylsulfonamido, C1-C2alkylcarbonyl, C1-C2alkoxycarbonyl, C1- C2alkylaminocarbonyl, C3-C4cycloalkyl, C3-C4cycloalkylaminocarbonyl, N,N-di(C1-15 C2alkyl)aminocarbonyl, or benzyloxy. In one set of embodiments, R9 is cyano, nitro, halogen, C1-C3alkyl, C1-C3haloalkyl, C1-C3alkoxy,C1-C3haloalkoxy, C3-C5cycloalkyl, or C1-C2alkylsulfonyl. Preferably, R9 is halogen, C1-C3alkyl, C1-C3haloalkyl, C1-C3alkoxy, C1-C3haloalkoxy, cyclopropyl, or C1-C2alkylsulfonyl. More preferably, R9is halogen, C1-C2alkyl, methoxy, trifluoromethyl, difluoromethyl, trifluoromethoxy, cyclopropyl, or20 methylsulfonyl. Even more preferably, R9 is halogen or C1-C3haloalkyl, preferably, fluoro, chloro, ortrifluoromethyl. More preferably still, R9 is fluoro or chloro.R10is halogen, oxo, C1-C3alkyl, or C1-C3alkoxy. Preferably, R10is halogen, C1-C3alkyl, or C1- C3alkoxy. Preferably, R10is halogen or C1-C3alkoxy. More preferably, R10is halogen or methoxy. Even more preferably, R10 is fluoro or methoxy. In one set of embodiments, R10 is oxo, methyl, fluoro or25 methoxy. In a compound of formula (I) according to the present invention, preferably: R1is C1-C3alkyl, C1-C3alkoxy, C2-C3alkenyl, C2-C3alkynyl, C1-C3alkoxyC1-C3alkyl, or C3- C6cycloalkyl; R2 is phenyl optionally substituted with 2 groups, which may be the same or different, represented30 by R7; R3is hydrogen; R4 is hydrogen or C1-C3alkyl;R5 is phenyl, pyridyl, or pyrazolyl, wherein each phenyl, pyridyl, and pyrazolyl moiety may beoptionally substituted with 1 or 2 groups which may be the same or different, represented by R9;35 R7 is cyano or halogen; andR9 is halogen or C1-C3haloalkyl. 109918 / 83165-FF 10 In another set of embodiments, R1is C1-C3alkyl; R2is phenyl optionally substituted with 2 groups, which may be the same or different, represented by R7; 5 R3is hydrogen; R4 is hydrogen or methyl;R5 is phenyl, pyridyl, or pyrazolyl, wherein each phenyl, pyridyl, and pyrazolyl moiety may beoptionally substituted with 1 or 2 groups which may be the same or different, represented by R9; R7 is chloro or cyano; and10 R9is fluoro, chloro, or trifluoromethyl. In a further set of embodiments, R1is ethyl; R2is 3,4-dichlorophenyl or 3-chloro-4-cyanophenyl; 15 R3is hydrogen; R4 is hydrogen or methyl;R5 is phenyl, pyridyl, or pyrazolyl, wherein each phenyl, pyridyl, and pyrazolyl moiety may beoptionally substituted with 1 or 2 groups which may be the same or different, represented by R9; R9is fluoro or chloro. 20 Compounds of the invention may be prepared by techniques known to the person skilled in the art of organic chemistry. General methods for the production of compounds of Formula (I) are described below. Unless otherwise stated in the text, R1, R2, R3, R4, and R5are as defined hereinbefore. The starting materials used for the preparation of the compounds of the invention may be purchased from25 usual commercial suppliers or may be prepared by known methods. The starting materials as well as the intermediates may be purified before use in the next step by state of the art methodologies such as chromatography, crystallisation, distillation and filtration. The compounds of Formula (I) of the present invention may be prepared from compounds of Formula30 (A) as shown below in Scheme 1. Scheme 1: Formula (A) Formula (I)A compound of Formula (I) may be prepared by hydrolysis of a compound of Formula (A) where R3is35 C1-C6alkyl and R4 is methyl or hydrogen, with a suitable base (such as sodium hydroxide or lithium 109918 / 83165-FF 11 hydroxide) or with a suitable lewis acid (such as scandium triflate) in a suitable solvent (such asdichloromethane, chloroform, ethyl acetate or tetrahydrofuran) with an optional co-solvent (such as water). In the cases where a base was used, the product was obtained following acidification with a suitable acid (such as hydrochloric acid). Compounds of Formula (A) may additionally be prepared by 5 methods described below. Scheme 2: Formula (B) Formula (A)A compound of Formula (B) wherein R4 is methyl and Y is Br or I may be converted to a compound of10 Formula (A) wherein R5 is not hydrogen, but any other R5 group as defined above, by an Ullmann cross-coupling with a nucleophile (such as phenol) in analogy to literature conditions. Typically the reaction is performed by reaction of a compound of Formula (B) with R5-nucleophile in the presence of a suitable catalyst (such as copper (I) iodide), with a suitable ligand (such as 2-(dimethylamino)acetic acid) and a suitable base (such as cesium carbonate) in an organic solvent (such as 1,4 dioxane) at elevated 15 temperature. Nucleophiles are commercially available or may be prepared by methods familiar to persons skilled in the art. This is shown above in Scheme 2. Scheme 3: Formula (C) Formula (B)Compounds of Formula (B) wherein R4 is methyl and Y is Br or I, may be prepared by treatment of20 compounds of Formula (C) with a suitable halogenating agent (such as N-bromosuccinimide) in a suitable solvent (such as acetonitrile or trifluoroacetic acid). This is shown above in Scheme 3. Scheme 4: 109918 / 83165-FF 12 Formula (E) Formula (D) Formula (C)Compounds of Formula (C) wherein R4 is methyl may be prepared by reacting a compound of Formula(D), with a compound of Formula (E), optionally in the presence of a solvent (such as xylene), at anelevated temperature (for example 140 °C). Compounds of Formula (D) and (E) are both commercially 5 available, and may be prepared by methods familiar to persons skilled in the art. This is shown above in Scheme 4. Scheme 5: Formula (F) Formula (A)10 A compound of Formula (A) wherein R4 is hydrogen may be prepared by reacting a compound ofFormula (F) with a suitable formylating reagent (such as tert-butoxybis(dimethylamino)methane) optionally in the presence of a solvent (such as toluene), at an elevated temperature (for example 120°C). This is shown above in Scheme 5. 15 Scheme 6: Acompound of Formula (F) may be prepared by reacting a compound of formula (D) with a suitableacyl electrophile. The acyl electrophile may be prepared in situ by treatment of carboxylic acids of formula (G) with an appropriate activating agent (such as oxalyl chloride), optionally in the presence of20 a solvent (such as dichloromethane). The acyl electrophile may then be reacted with compounds of Formula (D) in a suitable solvent (such as dichloromethane) in the presence of a base (such astriethylamine). This is shown above in Scheme 6. Compounds of Formula (D) and (G) are bothcommercially available, and also may be prepared by methods familiar to persons skilled in the art. 109918 / 83165-FF 13 Scheme 7: Formula (i) Formula (H) Formula (D) Compounds of Formula (D) may be prepared from reaction of β-keto esters of Formula (H) with an amine salt. The amine salts can be prepared in situ by acidification of amines of Formula (i) with a5 suitable acid (such as acetic acid). These amine salts may then be reacted with compounds of Formula (H) in a suitable solvent (such as toluene) in the presence of an acid (such as acetic acid) and a drying agent (such as 4Å molecular sieves). This is shown above in Scheme 7. Compounds of Formula (D), Formula (H), and Formula (i) are commercially available, and may also be prepared using conditionsdescribed below. 10 The present invention still further provides a method of controlling weeds at a locus said method comprising application to the locus of a weed controlling amount of a composition comprising a compound of Formula (I). Moreover, the present invention may further provide a method of selectively controlling weeds at a locus comprising useful (crop) plants and weeds, wherein the method comprises 15 application to the locus of a weed controlling amount of a composition according to the present invention. ‘Controlling’ means killing, reducing or retarding growth or preventing or reducing germination. It is noted that the compounds of the present invention show a much improved selectivity compared to known, structurally similar compounds. Generally the plants to be controlled are unwanted plants (weeds). ‘Locus’ means the area in which the plants are growing or will grow. The application may be applied to 20 the locus pre-emergence and / or postemergence of the crop plant. Some crop plants may be inherently tolerant to herbicidal effects of compounds of Formula (I). The rates of application of compounds of Formula (I) may vary within wide limits and depend on the nature of the soil, the method of application (pre- or post-emergence; seed dressing; application to25 the seed furrow; no tillage application etc.), the crop plant, the weed(s) to be controlled, the prevailing climatic conditions, and other factors governed by the method of application, the time of application and the target crop. The compounds of Formula I according to the invention are generally applied at a rate of from 10 to 2500 g / ha, especially from 25 to 1000 g / ha, more especially from 25 to 250 g / ha.The application is generally made by spraying the composition, typically by tractor mounted 30 sprayer for large areas, but other methods such as dusting (for powders), drip or drench can also be used. The term "useful plants" is to be understood as also including useful plants that have been rendered tolerant to herbicides like bromoxynil or classes of herbicides such as, for example, 4- Hydroxyphenylpyruvate dioxygenase (HPPD) inhibitors, ALS inhibitors, for example primisulfuron,35 prosulfuron and trifloxysulfuron, 5-enol-pyrovyl-shikimate-3-phosphate-synthase (EPSPS) inhibitors, glutamine synthetase (GS) inhibitors or protoporphyrinogen-oxidase (PPO) inhibitors as a result of conventional methods of breeding or genetic engineering. An example of a crop that has been rendered 109918 / 83165-FF 14 tolerant to imidazolinones, e.g. imazamox, by conventional methods of breeding (mutagenesis) is Clearfield® summer rape (Canola). Examples of crops that have been rendered tolerant to herbicides or classes of herbicides by genetic engineering methods include glyphosate- and glufosinate-resistantmaize varieties commercially available under the trade names RoundupReady®, Herculex I^ and5 LibertyLink®. The term "useful plants" is to be understood as also including useful plants which have been so transformed by the use of recombinant DNA techniques that they are capable of synthesising one or more selectively acting toxins, such as are known, for example, from toxin-producing bacteria, especially those of the genus Bacillus.10 Examples of such plants are: YieldGard^ (maize variety that expresses a CryIA(b) toxin);YieldGard Rootworm^ (maize variety that expresses a CryIIIB(b1) toxin); YieldGard Plus^ (maizevariety that expresses a CryIA(b) and a CryIIIB(b1) toxin); Starlink^ (maize variety that expresses aCry9(c) toxin); Herculex I^ (maize variety that expresses a CryIF(a2) toxin and the enzymephosphinothricine N-acetyltransferase (PAT) to achieve tolerance to the herbicide glufosinate15 ammonium); NuCOTN 33B^ (cotton variety that expresses a CryIA(c) toxin); Bollgard I^ (cotton varietythat expresses a CryIA(c) toxin); Bollgard II® (cotton variety that expresses a CryIA(c) and a CryIIA(b) toxin); VIPCOT^ (cotton variety that expresses a VIP toxin); NewLeaf^ (potato variety that expressesa CryIIIA toxin); NatureGard^ Agrisure® GT Advantage (GA21 glyphosate-tolerant trait), Agrisure® CBAdvantage (Bt11 corn borer (CB) trait), Agrisure® RW (corn rootworm trait) and Protecta^. 20 Plant crops or seed material thereof can be both resistant to herbicides and, at the same time, resistant to insect feeding (“stacked” transgenic events). For example, seed can have the ability to express an insecticidal Cry3 protein while at the same time being tolerant to glyphosate. Crop plants are also to be understood to include those which are obtained by conventional methods of breeding or genetic engineering and contain so-called output traits (e.g. improved storage25 stability, higher nutritional value and improved flavour). The compounds of Formula (I) (or compositions comprising such) can be used to control unwanted plants (collectively, ‘weeds’). The weeds to be controlled may be both monocotyledonous species, for example Agrostis, Alopecurus, Avena, Brachiaria, Bromus, Cenchrus, Cyperus, Digitaria, Echinochloa, Eleusine, Lolium, Monochoria, Rottboellia, Sagittaria, Scirpus, Setaria and Sorghum, and30 dicotyledonous species, for example Abutilon, Amaranthus, Ambrosia, Chenopodium, Chrysanthemum,Conyza, Galium, Ipomoea, Nasturtium, Sida, Sinapis, Solanum, Stellaria, Veronica, Viola and Xanthium. Compounds of Formula (I) may be used in unmodified form or, preferably, together with the adjuvants conventionally employed in the art of formulation to provide herbicidal compositions, using 35 formulation adjuvants, such as carriers, solvents and surface-active agents (SAA). The invention therefore further provides a herbicidal composition, comprising at least one compound Formula (I) and an agriculturally acceptable carrier and optionally an adjuvant. An agricultural acceptable carrier is for example a carrier that is suitable for agricultural use. Agricultural carriers are well known in the art. 109918 / 83165-FF 15 The herbicidal compositions generally comprise from 0.1 to 99 % by weight, especially from 0.1to 95 % by weight, compounds of Formula (I) and from 1 to 99.9 % by weight of a formulation adjuvantwhich preferably includes from 0 to 25 % by weight of a surface-active substance.The compositions can be chosen from a number of formulation types. These include an 5 emulsion concentrate (EC), a suspension concentrate (SC), a suspo-emulsion (SE), a capsule suspension (CS), a water dispersible granule (WG), an emulsifiable granule (EG), an emulsion, water in oil (EO), an emulsion, oil in water (EW), a micro-emulsion (ME), an oil dispersion (OD), an oil miscible flowable (OF), an oil miscible liquid (OL), a soluble concentrate (SL), an ultra-low volume suspension (SU), an ultra-low volume liquid (UL), a technical concentrate (TK), a dispersible concentrate (DC), a 10 soluble powder (SP), a wettable powder (WP) and a soluble granule (SG). The formulation type chosen in any instance will depend upon the particular purpose envisaged and the physical, chemical and biological properties of the compound of Formula (I). Soluble powders (SP) may be prepared by mixing a compound of Formula (I) with one or more water-soluble inorganic salts (such as sodium bicarbonate, sodium carbonate or magnesium sulphate) 15 or one or more water-soluble organic solids (such as a polysaccharide) and, optionally, one or more wetting agents, one or more dispersing agents or a mixture of said agents to improve water dispersibility / solubility. The mixture is then ground to a fine powder. Similar compositions may also be granulated to form water soluble granules (SG). Wettable powders (WP) may be prepared by mixing a compound of Formula (I) with one or more 20 solid diluents or carriers, one or more wetting agents and, preferably, one or more dispersing agents and, optionally, one or more suspending agents to facilitate the dispersion in liquids. The mixture is then ground to a fine powder. Similar compositions may also be granulated to form water dispersible granules (WG). Granules (GR) may be formed either by granulating a mixture of a compound of Formula (I) and 25 one or more powdered solid diluents or carriers, or from pre-formed blank granules by absorbing a compound of Formula (I) (or a solution thereof, in a suitable agent) in a porous granular material (such as pumice, attapulgite clays, fuller's earth, kieselguhr, diatomaceous earths or ground corn cobs) or by adsorbing a compound of Formula (I) (or a solution thereof, in a suitable agent) on to a hard core material (such as sands, silicates, mineral carbonates, sulphates or phosphates) and drying if necessary. Agents 30 which are commonly used to aid absorption or adsorption include solvents (such as aliphatic and aromatic petroleum solvents, alcohols, ethers, ketones and esters) and sticking agents (such as polyvinyl acetates, polyvinyl alcohols, dextrins, sugars and vegetable oils). One or more other additives may also be included in granules (for example an emulsifying agent, wetting agent or dispersing agent). Dispersible Concentrates (DC) may be prepared by dissolving a compound of Formula (I) in water 35 or an organic solvent, such as a ketone, alcohol or glycol ether. These solutions may contain a surface active agent (for example to improve water dilution or prevent crystallisation in a spray tank). Emulsifiable concentrates (EC) or oil-in-water emulsions (EW) may be prepared by dissolving a compound of Formula (I) in an organic solvent (optionally containing one or more wetting agents, one or more emulsifying agents or a mixture of said agents). Suitable organic solvents for use in ECs include 40 aromatic hydrocarbons (such as alkylbenzenes or alkylnaphthalenes, exemplified by SOLVESSO 100, SOLVESSO 150 and SOLVESSO 200; SOLVESSO is a Registered Trade Mark), ketones (such as 109918 / 83165-FF 16 cyclohexanone or methylcyclohexanone) and alcohols (such as benzyl alcohol, furfuryl alcohol or butanol), N-alkylpyrrolidones (such as N-methylpyrrolidone or N-octylpyrrolidone), dimethyl amides of fatty acids (such as C8-C10 fatty acid dimethylamide) and chlorinated hydrocarbons. An EC product may spontaneously emulsify on addition to water, to produce an emulsion with sufficient stability to allow 5 spray application through appropriate equipment. Preparation of an EW involves obtaining a compound of Formula (I) either as a liquid (if it is not a liquid at room temperature, it may be melted at a reasonable temperature, typically below 70°C) or in solution (by dissolving it in an appropriate solvent) and then emulsifying the resultant liquid or solutioninto water containing one or more SAAs, under high shear, to produce an emulsion. Suitable solvents 10 for use in EWs include vegetable oils, chlorinated hydrocarbons (such as chlorobenzenes), aromatic solvents (such as alkylbenzenes or alkylnaphthalenes) and other appropriate organic solvents which have a low solubility in water. Microemulsions (ME) may be prepared by mixing water with a blend of one or more solvents with one or more SAAs, to produce spontaneously a thermodynamically stable isotropic liquid formulation. A 15 compound of Formula (I) is present initially in either the water or the solvent / SAA blend. Suitable solvents for use in MEs include those hereinbefore described for use in in ECs or in EWs. An ME may be either an oil-in-water or a water-in-oil system (which system is present may be determined by conductivity measurements) and may be suitable for mixing water-soluble and oil-soluble pesticides in the same formulation. An ME is suitable for dilution into water, either remaining as a microemulsion or20 forming a conventional oil-in-water emulsion. Suspension concentrates (SC) may comprise aqueous or non-aqueous suspensions of finely divided insoluble solid particles of a compound of Formula (I). SCs may be prepared by ball or bead milling the solid compound of Formula (I) in a suitable medium, optionally with one or more dispersing agents, to produce a fine particle suspension of the compound. One or more wetting agents may be 25 included in the composition and a suspending agent may be included to reduce the rate at which the particles settle. Alternatively, a compound of Formula (I) may be dry milled and added to water, containing agents hereinbefore described, to produce the desired end product. Aerosol formulations comprise a compound of Formula (I) and a suitable propellant (for example n-butane). A compound of Formula (I) may also be dissolved or dispersed in a suitable medium (for30 example water or a water miscible liquid, such as n-propanol) to provide compositions for use in non- pressurised, hand-actuated spray pumps. Capsule suspensions (CS) may be prepared in a manner similar to the preparation of EW formulations but with an additional polymerisation stage such that an aqueous dispersion of oil droplets is obtained, in which each oil droplet is encapsulated by a polymeric shell and contains a compound of 35 Formula (I) and, optionally, a carrier or diluent therefor. The polymeric shell may be produced by either an interfacial polycondensation reaction or by a coacervation procedure. The compositions may provide for controlled release of the compound of Formula (I) and they may be used for seed treatment. A compound of Formula (I) may also be formulated in a biodegradable polymeric matrix to provide a slow, controlled release of the compound. 40 The composition may include one or more additives to improve the biological performance of the composition, for example by improving wetting, retention or distribution on surfaces; resistance to rain 109918 / 83165-FF 17 on treated surfaces; or uptake or mobility of a compound of Formula (I). Such additives include surface active agents (SAAs), spray additives based on oils, for example certain mineral oils or natural plant oils (such as soy bean and rape seed oil), modified plant oils such as methylated rape seed oil (MRSO), and blends of these with other bio-enhancing adjuvants (ingredients which may aid or modify the action of a 5 compound of Formula (I). Wetting agents, dispersing agents and emulsifying agents may be SAAs of the cationic, anionic, amphoteric or non-ionic type. Suitable SAAs of the cationic type include quaternary ammonium compounds (for example cetyltrimethyl ammonium bromide), imidazolines and amine salts. 10 Suitable anionic SAAs include alkali metals salts of fatty acids, salts of aliphatic monoesters of sulphuric acid (for example sodium lauryl sulphate), salts of sulphonated aromatic compounds (for example sodium dodecylbenzenesulphonate, calcium dodecylbenzenesulphonate, butylnaphthalene sulphonate and mixtures of sodium di-isopropyl- and tri-isopropyl-naphthalene sulphonates), ethersulphates, alcohol ether sulphates (for example sodium laureth-3-sulphate), ether carboxylates (for 15 example sodium laureth-3-carboxylate), phosphate esters (products from the reaction between one or more fatty alcohols and phosphoric acid (predominately mono-esters) or phosphorus pentoxide (predominately di-esters), for example the reaction between lauryl alcohol and tetraphosphoric acid; additionally these products may be ethoxylated), sulphosuccinamates, paraffin or olefine sulphonates, taurates, lignosulphonates and phosphates / sulphates of tristyrylphenols. 20 Suitable SAAs of the amphoteric type include betaines, propionates and glycinates. Suitable SAAs of the non-ionic type include condensation products of alkylene oxides, such as ethylene oxide, propylene oxide, butylene oxide or mixtures thereof, with fatty alcohols (such as oleyl alcohol or cetyl alcohol) or with alkylphenols (such as octylphenol, nonylphenol or octylcresol); partial esters derived from long chain fatty acids or hexitol anhydrides; condensation products of said partial 25 esters with ethylene oxide; block polymers (comprising ethylene oxide and propylene oxide); alkanolamides; simple esters (for example fatty acid polyethylene glycol esters); amine oxides (for example lauryl dimethyl amine oxide); lecithins and sorbitans and esters thereof, alkyl polyglycosides and tristyrylphenols. Suitable suspending agents include hydrophilic colloids (such as polysaccharides, 30 polyvinylpyrrolidone or sodium carboxymethylcellulose) and swelling clays (such as bentonite or attapulgite). The compounds of present invention can also be used in mixture with one or more additional herbicides and / or plant growth regulators. Examples of such additional herbicides or plant growth regulators include acetochlor, acifluorfen (including acifluorfen-sodium), aclonifen, ametryn, 35 amicarbazone, aminopyralid, aminotriazole, atrazine, beflubutamid-M, benquitrione, bensulfuron (including bensulfuron-methyl), bentazone, bicyclopyrone, bilanafos, bipyrazone, bispyribac-sodium, bixlozone, broclozone, bromacil, bromoxynil, butachlor, butafenacil, carfentrazone (including carfentrazone-ethyl), cloransulam (including cloransulam-methyl), chlorimuron (including chlorimuron- ethyl), chlorotoluron, chlorsulfuron, cinflubrolin, cinmethylin, clacyfos, clethodim, clodinafop (including 40 clodinafop-propargyl), clomazone, clopyralid, cyclopyranil, cyclopyrimorate, cyclosulfamuron, cyhalofop (including cyhalofop-butyl), cypyrafluone, 2,4-D (including the choline salt and 2-ethylhexyl ester 109918 / 83165-FF 18 thereof), 2,4-DB, desmedipham, dicamba (including the aluminium, aminopropyl, bis- aminopropylmethyl, choline, dichloroprop, diglycolamine, dimethylamine, dimethylammonium, potassium and sodium salts thereof) diclosulam, diflufenican, diflufenzopyr, dimesulfazet, dimethachlor, dimethenamid-P, dioxopyritrione, diquat dibromide, diuron, epyrifenacil, ethalfluralin, ethofumesate, 5 fenoxaprop (including fenoxaprop-P-ethyl), fenoxasulfone, fenpyrazone, fenquinotrione, fentrazamide, feproxydim, flazasulfuron, florasulam, florpyrauxifen (including florpyrauxifen-benzyl), fluazifop (including fluazifop-P-butyl), flucarbazone (including flucarbazone-sodium), fluchloraminopyr (including fluchloraminopyr-tefuryl), flufenacet, flufenoximacil, flumetsulam, flumioxazin, fluometuron, flupyrsulfuron (including flupyrsulfuron-methyl-sodium), fluroxypyr (including fluroxypyr-meptyl), 10 flusulfinam, fomesafen, foramsulfuron, glufosinate (including L-glufosinate and the ammonium salts of both), glyphosate (including the diammonium, isopropylammonium and potassium salts thereof), halauxifen (including halauxifen-methyl), haloxyfop (including haloxyfop-methyl), hexazinone, hydantocidin, icafolin (including icafolin-methyl), imazamox (including R-imazamox), imazapic, imazapyr, imazethapyr, indaziflam, indolauxipyr (including indolauxipyr-cyanomethyl), iodosulfuron 15 (including iodosulfuron-methyl-sodium), iofensulfuron (including iofensulfuron-sodium), ioxynil, iptriazopyrid, isoproturon, isoxaflutole, lancotrione, MCPA, MCPB, mecoprop-P, mesosulfuron (including mesosulfuron-methyl), mesotrione, metamitron, metazachlor, methiozolin, metolachlor, metosulam, metribuzin, metproxybicyclone, metsulfuron, napropamide, nicosulfuron, norflurazon, oxadiazon, oxasulfuron, oxyfluorfen, paraquat dichloride, pendimethalin, penoxsulam, phenmedipham, 20 picloram, pinoxaden, pretilachlor, primisulfuron-methyl, prometryne, propanil, propaquizafop, propyrisulfuron, propyzamide, prosulfocarb, prosulfuron, pyraclonil, pyraflufen (including pyraflufen- ethyl), pyraquinate, pyrasulfotole, pyridate, pyriftalid, pyriflubenzoxim, pyrimisulfan, pyroxasulfone, pyroxsulam, quinclorac, quinmerac, quizalofop (including quizalofop-P-ethyl and quizalofop-P-tefuryl), rimisoxafen, rimsulfuron, saflufenacil, sethoxydim, simazine, S-metalochlor, sulfentrazone, 25 sulfosulfuron, tebuthiuron, tefuryltrione, tembotrione, terbuthylazine, terbutryn, tetflupyrolimet, thiencarbazone, thifensulfuron, tiafenacil, tolpyralate, topramezone, tralkoxydim, triafamone, triallate, triasulfuron, tribenuron (including tribenuron-methyl), triclopyr, trifloxysulfuron (including trifloxysulfuron- sodium), trifludimoxazin, trifluralin, triflusulfuron, tripyrasulfone, 3-(2-chloro-4-fluoro-5-(3-methyl-2,6-dioxo-4-trifluoromethyl-3,6-dihydropyrimidin-1(2H)-yl)phenyl)-5-methyl-4,5-dihydroisoxazole-5-30 carboxylic acid ethyl ester, 4-hydroxy-1-methoxy-5-methyl-3-[4-(trifluoromethyl)-2-pyridyl]imidazolidin- 2-one, 4-hydroxy-1,5-dimethyl-3-[4-(trifluoromethyl)-2-pyridyl]imidazolidin-2-one, 5-ethoxy-4-hydroxy-1- methyl-3-[4-(trifluoromethyl)-2-pyridyl]imidazolidin-2-one, 4-hydroxy-1-methyl-3-[4-(trifluoromethyl)-2- pyridyl]imidazolidin-2-one, 4-hydroxy-1,5-dimethyl-3-[1-methyl-5-(trifluoromethyl)pyrazol-3- yl]imidazolidin-2-one, (4R)1-(5-tert-butylisoxazol-3-yl)-4-ethoxy-5-hydroxy-3-methyl-imidazolidin-2-one,35 ethyl-2-[[3-[[3-chloro-5-fluoro-6-[3-methyl-2,6-dioxo-4-(trifluoromethyl)-pyrimidin-1-yl]-2-pyridyl]oxy]-3- pyridyl]oxy]acetate, methyl 2-[2-[2-bromo-4-fluoro-5-[3-methyl-2,6-dioxo-4-(trifluoromethyl)pyrimidin-1- yl]phenoxy]phenoxy]-2-methoxy-acetate, 6-chloro-4-(2,7-dimethyl-1-naphthyl)-5-hydroxy-2-methyl- pyridazin-3-one, (2-fluorophenyl)methyl 6-amino-5-chloro-2-(4-chloro-2-fluoro-3-methoxy- phenyl)pyrimidine-4-carboxylate, 6-amino-5-chloro-2-(4-chloro-2-fluoro-3-methoxy-phenyl)pyrimidine-40 4-carboxylic acid, methyl 3-[2-chloro-5-[3,6-dihydro-3-methyl-2,6-dioxo-4-(trifluoromethyl)-1(2H)- pyrimidinyl]-4-fluorophenyl]-3a,4,5,6-tetrahydro-6-methyl-6aH-cyclopent[d]isoxazole-6a-carboxylate, 109918 / 83165-FF 19 (isopropylideneamino) 6-amino-2-(4-chloro-2-fluoro-3-methoxy-phenyl)-5-methoxy-pyrimidine-4- carboxylate and ethyl 2-[2-[[3-chloro-5-fluoro-6-[3-methyl-2,6-dioxo-4-(trifluoromethyl)pyrimidin-1-yl]-2- pyridyl]oxy]phenoxy]acetate. The mixing partners of the compound of Formula (I) may also be in the form of esters or salts, as 5 mentioned e.g. in The Pesticide Manual, Nineteenth Edition, British Crop Protection Council, 2021. The mixing ratio of the compound of Formula (I) to the mixing partner is preferably from 1: 100 to 1000:1. The mixtures can advantageously be used in the above-mentioned formulations (in which case "active ingredient" relates to the respective mixture of compound of Formula (I) with the mixing partner). The compounds or mixtures of the present invention can also be used in combination with one or 10 more herbicide safeners. Examples of such safeners include benoxacor, cloquintocet (including cloquintocet-mexyl), cyprosulfamide, dichlormid, fenchlorazole (including fenchlorazole-ethyl), fenclorim, fluxofenim, furilazole, isoxadifen (including isoxadifen-ethyl), mefenpyr (including mefenpyr- diethyl), metcamifen and oxabetrinil. Particularly preferred are mixtures of a compound of Formula (I) with cyprosulfamide,15 isoxadifen-ethyl, cloquintocet-mexyl and / or metcamifen. The safeners of the compound of Formula (I) may also be in the form of esters or salts, as mentioned e.g. in The Pesticide Manual, 19thEdition (BCPC), 2021. The reference to cloquintocet-mexyl also applies to a lithium, sodium, potassium, calcium, magnesium, aluminium, iron, ammonium, quaternary ammonium, sulfonium or phosphonium salt thereof as disclosed in WO 02 / 34048.20 Preferably the mixing ratio of compound of Formula (I) to safener is from 100:1 to 1:10, especially from 20:1 to 1:1. The compounds of Formula (I) are normally used in the form of agrochemical compositions and can be applied to the crop area or plant to be treated, simultaneously or in succession with further compounds. These further compounds can be e.g. fertilizers or micronutrient donors or other25 preparations, which influence the growth of plants. They can also be selective herbicides or non- selective herbicides as well as insecticides, fungicides, bactericides, nematicides, molluscicides or mixtures of several of these preparations, if desired together with further carriers, surfactants or application promoting adjuvants customarily employed in the art of formulation. The term “locus” as used herein means fields in or on which plants are growing, or where seeds 30 of cultivated plants are sown, or where seed will be placed into the soil. It includes soil, seeds, and seedlings, as well as established vegetation. The term “plants” refers to all physical parts of a plant, including seeds, seedlings, saplings, roots, tubers, stems, stalks, foliage, and fruits. 109918 / 83165-FF 20 The term “plant propagation material” is understood to denote generative parts of the plant, such as seeds, which can be used for the multiplication of the latter, and vegetative material, such as cuttings or tubers, for example potatoes. There may be mentioned for example seeds (in the strict sense), roots, fruits, tubers, bulbs, rhizomes and parts of plants. Germinated plants and young plants which are to be 5 transplanted after germination or after emergence from the soil, may also be mentioned. These young plants may be protected before transplantation by a total or partial treatment by immersion. Preferably “plant propagation material” is understood to denote seeds. Pesticidal agents referred to herein using their common name are known, for example, from "The Pesticide Manual", 19th Ed., British Crop Protection Council 2021. 10 The compounds of formula (I) may be used in unmodified form or, preferably, together with the adjuvants conventionally employed in the art of formulation. To this end, they may be conveniently formulated in known manner to emulsifiable concentrates, coatable pastes, directly sprayable or dilutable solutions or suspensions, dilute emulsions, wettable powders, soluble powders, dusts, granulates, and also encapsulations e.g. in polymeric substances. As with the type of the compositions, 15 the methods of application, such as spraying, atomising, dusting, scattering, coating or pouring, are chosen in accordance with the intended objectives and the prevailing circumstances. The compositions may also contain further adjuvants such as stabilizers, antifoams, viscosity regulators, binders or tackifiers as well as fertilizers, micronutrient donors or other formulations for obtaining special effects. Suitable carriers and adjuvants, e.g., for agricultural use, can be solid or liquid and are substances 20 useful in formulation technology, e.g. natural or regenerated mineral substances, solvents, dispersants, wetting agents, tackifiers, thickeners, binders or fertilizers. Such carriers are for example described in WO 97 / 33890. The compounds of Formula (I) are normally used in the form of compositions and can be applied to the crop area or plant to be treated, simultaneously or in succession with further compounds. These 25 further compounds can be, e.g., fertilizers or micronutrient donors or other preparations, which influence the growth of plants. They can also be selective herbicides or non-selective herbicides as well as insecticides, fungicides, bactericides, nematicides, molluscicides or mixtures of several of these preparations, if desired together with further carriers, surfactants or application promoting adjuvants customarily employed in the art of formulation. 30 The compound of Formula (I) may be the sole active ingredient of a composition or it may be admixed with one or more additional active ingredients such as a pesticide, fungicide, synergist, herbicide or plant growth regulator where appropriate. An additional active ingredient may, in some cases, result in unexpected synergistic activities. In general, the formulations include from 0.01 to 90% by weight of active agent, from 0 to 20% 35 agriculturally acceptable surfactant and 10 to 99.99% solid or liquid formulation inerts and adjuvant(s), the active agent consisting of at least the compound of formula (I) together with component (B) and (C), and optionally other active agents, particularly microbiocides or conservatives or the like. Concentrated forms of compositions generally contain in between about 2 and 80%, preferably between about 5 and 109918 / 83165-FF 21 70% by weight of active agent. Application forms of formulation may for example contain from 0.01 to 20% by weight, preferably from 0.01 to 5% by weight of active agent. Whereas commercial products will preferably be formulated as concentrates, the end user will normally employ diluted formulations. The table below illustrates examples of individual compounds of Formula (I) according to the5 invention: Table 1: Individual compounds of Formula (I) according to the invention 109918 / 83165-FF 22 Table A-1 provides 24 compounds A-1.001 to A.1.024 of Formula (I) wherein R3 and R4 are hydrogen,and R1, R2, and R5are as defined in Table 1. Table A-2 provides 24 compounds A-2.001 to A.2.024 of Formula (I) wherein R3 is hydrogen, R4 ismethyl, and R1, R2, and R5are as defined in Table 1. 5 Formulation Examples Wettable powders a) b) c)active ingredient [compound of formula (I)] 25 % 50 % 75 %sodium lignosulfonate 5 % 5 % -sodium lauryl sulfate 3 % - 5 %sodium diisobutylnaphthalenesulfonate - 6 % 10 %phenol polyethylene glycol ether - 2 % -(7-8 mol of ethylene oxide) highly dispersed silicic acid 5 % 10 % 10 % Kaolin 62 % 27 % -The active ingredient is thoroughly mixed with the adjuvants and the mixture is thoroughly ground in a 10 suitable mill, affording wettable powders that can be diluted with water to give suspensions of the desired concentration. Powders for dry seed treatment a) b) c)active ingredient [compound of formula (I)] 25 % 50 % 75 %light mineral oil 5 % 5 % 5 %highly dispersed silicic acid 5 % 5 % -Kaolin 65 % 40 % -Talcum - 20 %The active ingredient is thoroughly mixed with the adjuvants and the mixture is thoroughly ground in a15 suitable mill, affording powders that can be used directly for seed treatment. Emulsifiable concentrate active ingredient [compound of formula (I)] 10 %octylphenol polyethylene glycol ether 3 %(4-5 mol of ethylene oxide) calcium dodecylbenzenesulfonate 3 %castor oil polyglycol ether (35 mol of ethylene oxide) 4 %Cyclohexanone 30 %xylene mixture 50 % 109918 / 83165-FF 23 Emulsions of any required dilution, which can be used in plant protection, can be obtained from this concentrate by dilution with water. Dusts a) b) c)Active ingredient [compound of formula (I)] 5 % 6 % 4 %talcum 95 % - -Kaolin - 94 % -mineral filler - - 96 %5 Ready-for-use dusts are obtained by mixing the active ingredient with the carrier and grinding the mixture in a suitable mill. Such powders can also be used for dry dressings for seed. Extruder granules Active ingredient [compound of formula (I)] 15 %sodium lignosulfonate 2 %carboxymethylcellulose 1 %Kaolin 82 %The active ingredient is mixed and ground with the adjuvants, and the mixture is moistened with water. 10 The mixture is extruded and then dried in a stream of air. Coated granules Active ingredient [compound of formula (I)] 8 %polyethylene glycol (mol. wt.200) 3 % Kaolin 89 % The finely ground active ingredient is uniformly applied, in a mixer, to the kaolin moistened with polyethylene glycol. Non-dusty coated granules are obtained in this manner. 15 Suspension concentrate active ingredient [compound of formula (I)] 40 %propylene glycol 10 %nonylphenol polyethylene glycol ether (15 mol of ethylene oxide) 6 %Sodium lignosulfonate 10 %carboxymethylcellulose 1 %silicone oil (in the form of a 75 % emulsion in water) 1 %Water 32 %The finely ground active ingredient is intimately mixed with the adjuvants, giving a suspension concentrate from which suspensions of any desired dilution can be obtained by dilution with water. Using 109918 / 83165-FF 24 such dilutions, living plants as well as plant propagation material can be treated and protected against infestation by microorganisms, by spraying, pouring or immersion. Flowable concentrate for seed treatment active ingredient [compound of formula (I)] 40 %propylene glycol 5 %copolymer butanol PO / EO 2 %tristyrenephenole with 10-20 moles EO 2 %1,2-benzisothiazolin-3-one (in the form of a 20% solution in water) 0.5 %monoazo-pigment calcium salt 5 %Silicone oil (in the form of a 75 % emulsion in water) 0.2 %Water 45.3 %5 The finely ground active ingredient is intimately mixed with the adjuvants, giving a suspension concentrate from which suspensions of any desired dilution can be obtained by dilution with water. Using such dilutions, living plants as well as plant propagation material can be treated and protected against infestation by microorganisms, by spraying, pouring or immersion. 10 Slow Release Capsule Suspension 28 parts of a combination of the compound of formula (I) are mixed with 2 parts of an aromatic solvent and 7 parts of toluene diisocyanate / polymethylene-polyphenylisocyanate-mixture (8:1). This mixture is emulsified in a mixture of 1.2 parts of polyvinyl alcohol, 0.05 parts of a defoamer and 51.6 parts of water until the desired particle size is achieved. To this emulsion a mixture of 2.8 parts 1,6-diaminohexane in15 5.3 parts of water is added. The mixture is agitated until the polymerization reaction is completed. Theobtained capsule suspension is stabilized by adding 0.25 parts of a thickener and 3 parts of a dispersing agent. The capsule suspension formulation contains 28% of the active ingredients. The medium capsule diameter is 8-15 microns. The resulting formulation is applied to seeds as an aqueous suspensionin an apparatus suitable for that purpose. 20 Examples The following non-limiting examples provide specific synthesis methods for representative compounds of the present invention, as referred to in Table 2 below.25 Throughout this description, temperatures are given in degrees Celsius (°C) and “m.p.” means melting point. List of Abbreviations Å= angstrom, brs = broad singlet, °C = degrees Celsius, d = doublet, dd = doublet of doublets, DMF =30 dimethylformamide, DMSO = dimethyl sulfoxide, h = hour(s), LCMS = Liquid-chromatography mass- spectrometry, M = molar, m = multiplet, MHz = megahertz, q = quartet, s = singlet, t = triplet THF =tetrahydrofuran. 109918 / 83165-FF 25 Example 1: Synthesis of 2-(3,4-dichlorophenyl)-1-ethyl-5-(4-fluorophenoxy)-6-methyl-4-oxo- pyridine-3-carboxylic acid (Compound 8) Step 1: Synthesis of methyl (Z)-3-(3,4-dichlorophenyl)-3-(ethylamino)prop-2-enoate 5 To a stirred solution of ethylamine (2 M in THF) (12.2 mL, 24.3 mmol) at 0 °C was added dropwise aceticacid (1.39 mL, 24.3 mmol). The mixture was allowed to warm to room temperature and stirred for 1 h before being evaporated to dryness under reduced pressure to afford ethylammonium acetate (2.55 g, 24.3 mmol). The ethylammonium acetate (2.55 g, 24.3 mmol) was added to a solution of methyl 3-(3,4- 10 dichlorophenyl)-3-oxo-propanoate (2.00 g, 8.09 mmol) in toluene (20 mL) followed by addition of acetic acid (0.46 mL, 8.09 mmol) and powdered 4Å molecular sieves. The reaction mixture was heated atreflux for 18 h. The cooled reaction mixture was diluted with ethyl acetate, filtered, and washed with saturated aqueous sodium bicarbonate solution. The phases were separated and the aqueous was extracted with ethyl acetate (x3). The combined organic extracts were washed with brine, dried over 15 magnesium sulfate and evaporated to dryness under reduced pressure. The crude residue was purified by flash chromatography on silica gel using a gradient of 0-10% ethyl acetate in isohexane as eluent to give methyl (Z)-3-(3,4-dichlorophenyl)-3-(ethylamino)prop-2-enoate as a pale yellow oil. 1H NMR (400MHz, chloroform) δ = 8.37 (brs, 1H), 7.48 (d, 1H), 7.46 (d, 1H), 7.20 (m, 1H), 4.55 (s, 1H), 3.68 (s, 3H), 3.07 (m, 2H), 1.13-1.09 (m, 3H). 20 Step 2: Synthesis of methyl 2-(3,4-dichlorophenyl)-1-ethyl-6-methyl-4-oxo-pyridine-3- carboxylate A stirred mixture of methyl (Z)-3-(3,4-dichlorophenyl)-3-(ethylamino)prop-2-enoate (1.50 g, 5.5 mmol) 25 and 2,2,6-trimethyl-1,3-dioxin-4-one (0.82 g, 5.5 mmol) under nitrogen were heated at 120 °C for 3 h The cooled reaction mixture was evaporated to dryness under reduced pressure. The crude residue was purified by flash chromatography on silica gel using a gradient of 0-10% methanol in dichloromethane as eluent to give methyl 2-(3,4-dichlorophenyl)-1-ethyl-6-methyl-4-oxo-pyridine-3- 109918 / 83165-FF 26 carboxylate as an off-white solid. 1H NMR (400 MHz, chloroform) δ = 7.56 (d, 1H), 7.50 (d, 1H), 7.24(m, 1H), 6.41 (s, 1H), 3.72 (q, 2H), 3.55 (s, 3H), 2.42 (s, 3H), 1.13 (t, 3H). Step 3: Synthesis of methyl 5-bromo-2-(3,4-dichlorophenyl)-1-ethyl-6-methyl-4-oxo-pyridine-3- 5 carboxylate To a stirred solution of methyl 2-(3,4-dichlorophenyl)-1-ethyl-6-methyl-4-oxo-pyridine-3-carboxylate (0.500 g, 1.47 mmol) in acetonitrile (5.0 mL, 95.7 mmol) at room temperature was added portion-wise N-bromosuccinimide (0.26 g, 1.47 mmol). The reaction mixture was stirred at room temperature until 10 LCMS indicated full consumption of starting material. The reaction mixture was quenched by addition of saturated aqueous sodium hydrogen carbonate solution (30 mL) and the aqueous phase was extracted with dichloromethane (x3). The combined organic extracts were passed through a phase separator and evaporated to dryness under reduced pressure. The crude residue was purified by flash chromatography on silica gel using a gradient of 50-100% ethyl acetate in isohexane as eluent to give methyl 5-bromo-15 2-(3,4-dichlorophenyl)-1-ethyl-6-methyl-4-oxo-pyridine-3-carboxylate as a colourless solid. 1H NMR(400 MHz, chloroform) δ = 7.57 (m, 1H), 7.49 (m, 1H), 7.23 (m, 1H), 3.85 (q, 2H), 3.57 (s, 3H), 2.74 (s, 3H), 1.17 (t, 3H). Step 4: Synthesis of methyl 2-(3,4-dichlorophenyl)-1-ethyl-5-(4-fluorophenoxy)-6-methyl-4-oxo-20 pyridine-3-carboxylate To a stirred solution of methyl 5-bromo-2-(3,4-dichlorophenyl)-1-ethyl-6-methyl-4-oxo-pyridine-3- carboxylate (1.00 g, 2.39 mmol), 4-fluorophenol (535 mg, 4.77 mmol), and cesium carbonate (2.33 g,25 7.16 mmol) in 1,4-dioxane (15 mL), were added 2-(dimethylamino)acetic acid (73.8 mg, 0.716 mmol) and copper(I) iodide (45.4 mg, 0.239 mmol). The reaction mixture was then stirred at reflux for 22 h. The cooled reaction mixture was diluted with water and extracted with ethyl acetate (x3). The combinedorganics were dried over sodium sulfate, and then filtered and concentrated to dryness under reduced 109918 / 83165-FF 27 pressure. The crude residue was purified by flash chromatography on silica gel using a gradient of 0- 80% ethyl acetate in isohexane as eluent to give methyl 2-(3,4-dichlorophenyl)-1-ethyl-5-(4- fluorophenoxy)-6-methyl-4-oxo-pyridine-3-carboxylate as a yellow oil. 1H NMR (400 MHz, DSMO) δ =7.90 – 7.85 (m, 1H), 7.82 – 7.78 (m, 1H), 7.55 – 7.47 (m, 1H), 7.20 – 7.10 (m, 2H), 6.95 – 6.85 (m, 2H),5 3.78 (q, 2H), 3.37 (s, 3H), 2.39 (s, 3H), 1.10 (t, 3H). Step 5: Synthesis of 2-(3,4-dichlorophenyl)-1-ethyl-5-(4-fluorophenoxy)-6-methyl-4-oxo-pyridine- 3-carboxylic acid To a stirring solution of methyl 2-(3,4-dichlorophenyl)-1-ethyl-5-(4-fluorophenoxy)-6-methyl-4-oxo- 10 pyridine-3-carboxylate (0.130 g, 0.289 mmol) in THF (8 mL) and water (3 mL) was added lithium hydroxide (36.3 mg, 0.866 mmol). The reaction mixture was then heated at 70 °C for 16 h. The cooled reaction mixture was diluted with water and extracted with ethyl acetate. The aqueous layer was then acidified with 2 M hydrochloric acid and extracted with ethyl acetate (x2). The combined organics were washed with brine, dried over sodium sulfate, and then filtered and concentrated to dryness under15 reduced pressure to afford 2-(3,4-dichlorophenyl)-1-ethyl-5-(4-fluorophenoxy)-6-methyl-4-oxo-pyridine-3-carboxylic acid as a white solid. 1H NMR (400 MHz, DMSO) δ = 7.81 (m, 2H), 7.46 (m, 1H), 7.18 (m,2H), 7.01-6.97 (m, 2H), 3.88 (q, 2H), 2.50 (m, 3H), 1.12 (t, 3H). Example 2: Synthesis of 1-ethyl-5-(4-fluorophenoxy)-4-oxo-2-phenyl-pyridine-3-carboxylic acid20 (Compound 7) Step 6: Synthesis of ethyl (Z)-3-(ethylamino)-3-phenyl-prop-2-enoate To a stirring solution of ethyl 3-oxo-3-phenyl-propanoate (6.00 g, 31.2 mmol) in ethanol (120 mL) was25 added ethylamine (35% in ethanol, 18.0 mL, 109 mmol) and acetic acid (1.79 mL, 31.2 mmol). The reaction mixture was then heated to reflux for 18 h. The reaction mixture was diluted with water and extracted with dichloromethane (x3). The combined organics were then dried over magnesium sulfate, filtered, and concentrated to dryness under reduced pressure. The crude residue was purified by flash chromatography on silica gel using a gradient of 0-30% ethyl acetate in cyclohexane as eluent to give 109918 / 83165-FF 28 ethyl (Z)-3-(ethylamino)-3-phenyl-prop-2-enoate as a yellow oil. 1H NMR (400 MHz, chloroform) δ =8.50-8.28 (m, 1H), 7.52-7.37 (m, 2H), 7.23-7.12 (m, 1H), 4.19-4.10 (m, 2H), 3.13-2.96 (m, 2H), 1.33- 1.25 (m, 3H), 1.18-1.07 (m, 3H). 5 Step 7: Synthesis of 2-(4-fluorophenoxy)acetyl chloride A stirring solution of 2-(4-fluorophenoxy)acetic acid (1.00 g, 5.88 mmol) in dichloromethane (17 mL) was cooled to 0 °C and then oxalyl chloride (566 µL, 6.47 mmol) was added dropwise followed by DMF (1 10 drop). The reaction mixture was then allowed to stir at 0 °C for 30 mins, and then warmed to room temperature and concentrated to dryness under reduced pressure. The crude residue was then usedwithout further analysis or purification. Step 8: Synthesis of ethyl (2E)-2-[ethylamino(phenyl)methylene]-4-(4-fluorophenoxy)-3-oxo-15 butanoate To a stirred solution of the above crude residue of 2-(4-fluorophenoxy)acetyl chloride in dichloromethane (10 mL) was added triethylamine (1.07 mL, 7.64 mmol) and ethyl (Z)-3-(ethylamino)-3-phenyl-prop-2- enoate (1.42 g, 6.47 mmol). The reaction mixture was then stirred at room temperature for 2 h. The20 reaction mixture was then diluted with saturated aqueous ammonium chloride and extracted with ethyl acetate (x3). The combined organics were then dried over magnesium sulfate, filtered, and concentrated to dryness under reduced pressure. The crude residue was purified by flash chromatography on silica gel using a gradient of 0-50% ethyl acetate in cyclohexane as eluent to give ethyl (2E)-2-[ethylamino(phenyl)methylene]-4-(4-fluorophenoxy)-3-oxo-butanoate as a pale-yellow solid. 1H NMR25 (chloroform) δ: 7.44-7.47 (m, 3H), 7.25-7.28 (m, 2H), 6.91-6.99 (m, 4H), 5.07 (s, 2H), 3.62-3.78 (m, 2H), 3.02-3.17 (m, 2H), 1.13-1.19 (m, 3H), 0.59-0.73 (m, 3H) Step 9: Synthesis of ethyl 1-ethyl-5-(4-fluorophenoxy)-4-oxo-2-phenyl-pyridine-3-carboxylate 109918 / 83165-FF 29 A stirred solution of ethyl (2E)-2-[ethylamino(phenyl)methylene]-4-(4-fluorophenoxy)-3-oxo-butanoate (275 mg, 0.74 mmol) and 1-tert-butoxy-N,N,N',N'-tetramethyl-methanediamine (340 µL, 1.48 mmol) in toluene (2 mL) was heated under microwave irradiation at 120 °C for 20 mins. The cooled reaction5 mixture was then diluted with water and extracted with ethyl acetate (x3). The combined organics were then dried over magnesium sulfate, filtered, and concentrated to dryness under reduced pressure. The crude residue was purified by flash chromatography on C-18 silica gel using a gradient of 45-75%acetonitrile (+0.1% formic acid) in water (+0.1% formic acid) as eluent to give ethyl 1-ethyl-5-(4-fluorophenoxy)-4-oxo-2-phenyl-pyridine-3-carboxylate as a solid. 1H NMR (methanol) δ: 7.97-8.05 (m,10 1H), 7.54-7.63 (m, 3H), 7.48 (m 2H), 7.00-7.12 (m, 4H), 3.90-3.98 (q, 2H), 3.79-3.88 (m, 2H), 1.20-1.24 (m, 3H), 0.87-0.93 (m, 3H). Step 10: Synthesis of 1-ethyl-5-(4-fluorophenoxy)-4-oxo-2-phenyl-pyridine-3-carboxylic acid 15 A stirred solution of ethyl 1-ethyl-5-(4-fluorophenoxy)-4-oxo-2-phenyl-pyridine-3-carboxylate (85 mg, 0.22 mmol) and scandium(III) triflate (111 mg, 0.22 mmol) in THF (1 mL) and water (1 mL) was heated under microwave irradiation at 120 °C for 30 mins. The cooled reaction mixture was then diluted with saturated aqueous ammonium chloride and extracted with ethyl acetate (x3). The combined organics were then dried over magnesium sulfate, filtered, and concentrated to dryness under reduced pressure20 to afford 1-ethyl-5-(4-fluorophenoxy)-4-oxo-2-phenyl-pyridine-3-carboxylic acid as a brown solid. 1HNMR (chloroform) δ: 7.49-7.59 (m, 3H), 7.42-7.48 (m, 1H), 7.23-7.28 (m, 2H), 7.02-7.14 (m, 4H), 3.67- 3.81 (m, 2H), 1.22-1.27 (m, 3H). 25 109918 / 83165-FF 30 Table 2: 1H NMR Data for selected compounds of the invention. 109918 / 83165-FF 31 109918 / 83165-FF 32 109918 / 83165-FF 33 109918 / 83165-FF 34 Biological examples Seeds of a variety of test species are sown in standard soil in pots (Setaria faberi (SETFA), Ipomoeahederacea (IPOHE), Echinochloa crus-galli (ECHCG), Amaranthus retoflexus (AMARE), Zea mays5 (ZEAMX), Amaranthus palmeri (AMAPA), and Abutilon theophrasti (ABUTH)). After 8 days cultivationunder controlled conditions in a glasshouse (at 24 °C / 16 °C, day / night; 14 hours light; 65 % humidity), the plants are sprayed with an aqueous spray solution derived from the formulation of the technical active ingredient in acetone / water (50:50) solution containing 0.5% Tween 20 (polyoxyethelyene sorbitan monolaurate, CAS RN 9005-64-5). Rate of application is 250 in g / ha. The test plants are then10 grown in a glasshouse under controlled conditions in a glasshouse (at 24 °C / 16 °C, day / night; 14 hours light; 65 % humidity) and watered twice daily. After 13 days the test is evaluated for the percentage damage caused to the plant. The biological activities are shown in the following table on a five-point scale (5 = 81-100%; 4 = 61-80%; 3=41-60%; 2=21-40%; 1=1-20%; - = not tested).15 Table B1: Pre-Emergence Test 109918 / 83165-FF 35Table B2: Post-Emergence Test

Claims

1. 109918 / 83165-FF 36 Claims:

1. A compound of Formula (I):5 wherein R1is C1-C6alkyl, C1-C6alkoxy, C2-C6alkenyl, C2-C6alkynyl, C1-C6alkoxyC1-C6alkyl, or C3- C6cycloalkyl; R2 is phenyl or heteroaryl, wherein the heteroaryl moiety is a 5- or 6-membered aromatic ringwhich comprises 1, 2, 3 or 4 heteroatoms individually selected from N, O and S, and wherein each 10 phenyl and heteroaryl moiety may be optionally substituted with 1, 2, 3, or 4 groups, which may be the same or different, represented by R7; R3is hydrogen or C1-C6alkyl; R4is hydrogen, halogen, C1-C6alkyl, or C1-C6haloalkyl; R5 is phenyl or heteroaryl, wherein the heteroaryl moiety is a 5- or 6-membered aromatic ring15 which comprises 1, 2, 3 or 4 heteroatoms individually selected from N, O and S, and wherein each phenyl and heteroaryl moiety may be optionally substituted with 1, 2, 3, or 4 groups, which may be the same or different, represented by R9; R7is cyano, nitro, halogen, C1-C6alkyl, C1-C6alkoxy, C1-C6haloalkyl, C1-C6haloalkoxy, C1- C6alkoxyC1-C6alkyl, C1-C6alkylsulfanyl, C1-C6alkylsulfinyl, C1-C6alkylsulfonyl, C1-C6alkylsulfonamido,20 C1-C6alkylcarbonyl, C1-C6alkoxycarbonyl, C1-C6alkylaminocarbonyl, C3-C6cycloalkyl, C3- C6cycloalkylaminocarbonyl, or N,N-di(C1-C4alkyl)aminocarbonyl; R9is cyano, nitro, hydroxy, halogen, C1-C6alkyl, C1-C6alkoxy, C1-C6haloalkyl, C1-C6haloalkoxy, C1-C6alkoxyC1-C6alkyl, C1-C6alkylsulfanyl, C1-C6alkylsulfinyl, C1-C6alkylsulfonyl, C1-C6alkylsulfonamido, C1-C6alkylcarbonyl, C1-C6alkoxycarbonyl, C1-C6alkylaminocarbonyl, C3-C6cycloalkyl, C3-25 C6cycloalkylaminocarbonyl, N,N-di(C1-C4alkyl)aminocarbonyl, or benzyloxy; or any two adjacent R9groups together with the carbon atoms to which they are attached, may form a C3-C6cycloalkyl ring or phenyl ring, wherein the C3-C6cycloalkyl and phenyl moieties may be optionally substituted with 1, 2, 3 or 4 groups, which may be the same or different, represented by R10; or any two adjacent R9groups together with the carbon atoms to which they are attached, may form30 a 5- or 6-membered heteroaryl ring, wherein the heteroaryl moiety is a 5- or 6-membered aromatic ring109918 / 83165-FF 37 which comprises 1, 2, 3 or 4 heteroatoms individually selected from N, O and S, and wherein the heteroaryl moiety may be optionally substituted with 1, 2, 3 or 4 groups, which may be the same or different, represented by R10; or any two adjacent R9groups together with the carbon atoms to which they are attached, may form 5a 5- or 6-membered heterocyclyl ring, wherein the heterocyclyl moiety is a 5- or 6-membered comprising1 or 2 heteroatoms selected from O and N, and wherein the heterocyclyl ring may be optionally substituted with 1, 2, 3 or 4 groups, which may be the same or different, represented by R10; andR10is halogen, oxo, C1-C3alkyl, or C1-C3alkoxy; or a salt or an N-oxide thereof. 10 2. The compound according to claim 1, wherein R1 is C1-C4alkyl.

3. The compound according to claim 1 or claim 2, wherein R2 is phenyl optionally substituted with1 or 2 groups, which may be the same or different, represented by R7. 15 4. The compound according to any one of claims 1 to 3, wherein R4 is hydrogen or C1-C3alkyl.

5. The compound according to any one of claims 1 to 4, wherein R5 is phenyl or heteroaryl, whereinthe heteroaryl moiety is a 5- or 6-membered aromatic ring which comprises 1 or 2 heteroatoms20 individually selected from N and O, and wherein each phenyl and heteroaryl moiety may be optionally substituted with 1, 2, or 3 groups, which may be the same or different, represented by R9.

6. The compound according to any one of claims 1 to 5, wherein R5 is phenyl or heteroaryl, whereinthe heteroaryl moiety is a 5- or 6-membered aromatic ring which comprises 1 or 2 nitrogen atoms, and25 wherein each phenyl and heteroaryl moiety may be optionally substituted with 1 or 2 groups, which maybe the same or different, represented by R9.

7. The compound according to any one of claims 1 to 6, wherein R5 is phenyl, pyridyl, or pyrazolyl,wherein each phenyl, pyridyl, and pyrazolyl moiety may be optionally substituted with 1 or 2 groups,30 which may be the same or different, represented by R9.

8. The compound according to any one of claims 1 to 7, wherein R7 is cyano or halogen.

9. The compound according to any one of claims 1 to 8, wherein R9 is halogen or C1-C3haloalkyl.35 10. The compound according to any one of claims 1 to 9, wherein R2 is 3,4-dichlorophenyl or 3-chloro-4-cyanophenyl.109918 / 83165-FF 38 11. A herbicidal composition comprising a compound according to any one of the previous claims and an agriculturally acceptable formulation adjuvant.

12. A herbicidal composition according to claim 11, further comprising at least one additional5 pesticide.

13. A herbicidal composition according to claim 12, wherein the additional pesticide is a herbicide or herbicide safener.10 14. A method of controlling weeds at a locus comprising applying to the locus of a weed controllingamount of a composition according to any one of claims 11 to 13.

15. Use of a compound of Formula (I) according to any one of claims 1 to 10 as a herbicide.

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