HERBICIDAL SULFONYLUREAS AND THEIR USE

摘要

Substituted sulfonylureas of the formula I <IMAGE> I where n and m are each 0 or 1, R1 is hydrogen, alkyl alkenyl or alkynyl, R2 is halogen or trifluoromethyl when m is 0, or is alkyl, alkenyl or alkynyl when m is 1, or is trifluoromethyl or chlorodifluoromethyl when X is O or S and m is 1, X is O, S or N-R4, R4 is hydrogen or alkyl, R3 is hydrogen, halogen, alkyl, haloalkyl or alkoxy, A is haloalkyl, halogen, cyano, nitro, alkoxy, alkylthio, alkylsulfinyl, alkylsulfonyl or a radical <IMAGE> B is oxygen or an alkylimino group N-R6; R5 is hydrogen, unsubstituted or substituted alkyl or unsubstituted or substituted cycloalkyl or is alkenyl or alkynyl and R6 is hydrogen or alkyl or, together with R5, forms a C4-C6-alkylene chain in which a methylene group may be replaced by an oxygen atom or a C1-C4-alkylimino group, and their environmentally compatible salts, processes and intermediates for the preparation of the compounds I and their use as herbicides and bioregulators.