SULPHONYLUREA HERBICIDES AND PREPARATION THEREOF

摘要

Herbicides of formula (I): L-SO2-NH-CO-NR6-A in which: L corresponds to one of the groups of formula L-1 to L-6 shown below, A corresponds to the group of formula (II) shown below, R1, R2 and R3, which are identical or different, denote a C1-C4 alkyl or C7-C11 aralkyl radical, especially benzyl; R7, R8 and R9, which are identical or different, denote a hydrogen or halogen atom or a C1-C4 alkyl radical optionally substituted by one or more halogen atoms or C1-C4 alkoxy or C1-C4 alkylthio radicals, C3-C6 cycloalkyl optionally substituted by one or more halogen atoms or C1-C4 alkoxy or C1-C4 alkylthio radicals, C1-C4 alkoxy or C1-C4 alkylthio which are optionally substituted by one or more halogen atoms or C1-C4 alkoxy or C1-C4 alkylthio radicals, R13S(O)n-, n being an integer equal to 1 or 2, R13 being a C1-C4 alkyl radical optionally substituted by one or more halogen atoms or C1-C4 alkoxy or C1-C4 alkylthio radicals, COOR14, R14 being a hydrogen atom, a C1-C4 alkyl or C3-C6 cycloalkyl radical which are optionally substituted by one or more halogen atoms or C1-C4 alkoxy or C1-C4 alkylthio radicals, C3-C6 alkenyl optionally substituted by one or more halogen atoms, R10 and R11, which are identical or different, have the same meaning as R7 with the exception of the halogen atom. m corresponds to 0 or 1. Z is an oxygen or sulphur atom or the group =N-R12. R12 is a C1-C6 alkyl, C6-C10 aryl or C7-C11 aralkyl radical, preferably methyl. X is a trivalent radical, -CH= or -N=, preferably -N=. R4 and R5, which are identical or different, denote a C1-C4 alkyl (preferably methyl), C1-C4 alkoxy (preferably methoxy), C1-C4 alkylthio (preferably methylthio), C1-C4 haloalkyl (preferably trifluoromethyl), C1-C4 haloalkoxy (preferably di- or trifluoromethoxy), C1-C4 haloalkylthio (preferably trifluoromethylthio), C2-C6 alkoxyalkyl (preferably methoxymethyl), C2-C6 alkoxyalkoxy (preferably methoxymethoxy), C1-C4 alkylamino, or di(C1-C4 alkyl)amino radical or a halogen atom (preferably chlorine R6 denotes a hydrogen atom or a C1-C4 alkyl (preferably methyl) radical, R6 is advantageously a hydrogen atom, and the agriculturally acceptable salts of these compounds.