| abstract |
Sulfonylurea derivatives corresponding to formula (I) in which R1 represents alkyl or optionally substituted phenyl; alkenyl or propargyl; alkylamino or dialkylamino; R2 represents hydrogen, halogen, methyl optionally substituted by halogen, methoxy or ethoxy, an alkylsulfonyl, nitro or cyano group; R3 represents difluoromethoxy, trifluoromethoxy, bromodifluoromethoxy, chlorodifluoromethoxy or fluorine; R4 represents halogen, methyl optionally substituted by halogen, ethyl, methoxy or ethoxy or the methylamino or dimethylamino group; R5 represents hydrogen, alkyl, alkenyl or an alkinyl; Z represents CH or N, provided that a) if R3 denotes the difluoromethoxy group, R1 does not represent any di (alkyl) amino group, R2 does not represent any alkylsulfonyl group and R4 does not represent methyl or methoxy, b) if R3 represents an atom of fluorine and Z represents N, R4 does not represent any alkylamino group, as well as the salts of these compounds. The sulfonylurea derivatives are used as herbicides. |