Herbicidal derivatives

A compound of Formula (I):

• wherein
• R1 is 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 ring 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 R5;
• R3 is hydrogen or C1-C6alkyl;
• R4 is phenyl or heteroaryl, wherein the heteroaryl moiety is a 5- or 6-membered aromatic monocyclic ring comprising 1, 2, or 3 heteroatoms individually selected from N, O and S, wherein the heteroaryl moiety may be attached to the rest of the molecule through a carbon or nitrogen atom in the heteroaryl ring, and wherein the phenyl and heteroaryl moieties may each be optionally substituted with 1, 2, 3, or 4 groups, which may be the same or different, represented by R6;
• R5 is 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-C6cycloalkylaminocarbonyl, or N,N-di(C1-C4alkyl)aminocarbonyl;
• R6 is cyano, nitro, halogen, oxo, C1-C6alkyl, C1-C6alkoxy, C1-C6haloalkyl, C1-C6haloalkoxy, C1-C6alkoxyC1-C6alkyl, C1-C6alkoxyC1-C6alkoxy, C2-C6alkenyl, C2-C6alkynyl, C2-C6alkenyloxy, C2-C6alkynyloxy, C1-C6alkylsulfanyl, C1-C6alkylsulfinyl, C1-C6alkylsulfonyl, C1-C6alkylsulfonamido, C1-C6alkylcarbonyl, C1-C6alkoxycarbonyl, C1-C6alkylaminocarbonyl, C3-C6cycloalkyl, C3-C6cycloalkylC1-C6alkoxy, N,N-di(C1-C4alkyl)aminosulfonyl, C3-C6cycloalkylaminocarbonyl, N,N-di(C1-C4alkyl)aminocarbonyl, phenoxy, or benzyloxy, wherein each cycloalkyl or phenyl moiety may be optionally substituted with 1 or 2 groups, which may be the same or different, represented by R8;
• or
• any two adjacent R6 groups together with the carbon atoms to which they are attached, may form a phenyl ring, or a 5- or 6-membered heterocyclyl ring, comprising 1 or 2 heteroatoms selected from O and N, and wherein the phenyl and heterocyclyl rings may be optionally substituted with 1, 2, 3 or 4 groups, which may be the same or different, represented by R9;
• R8 is cyano, halogen, C1-C3alkyl, or C1-C3alkoxy;
• R9 is halogen, C1-C3alkyl, or C1-C3alkoxy;
• or a salt or an N-oxide thereof.