SULFAMOYLPHENYLHARNSTOFFE.

摘要

The N-acylsulphamoylphenyl ureas of the formula I below are suitable as preventives (antidotes or safeners) to protect crop plants from the phytotoxic effect of herbicides. Possible crops are preferably cereals, soya, sorghum, maize and rice, and possible herbicides are sulphonyl ureas, chloroacetanilides and aryloxyphenoxypropionic acid derivatives. The N-acylsulphamoylphenyl ureas correspond to the formula I in which A stands for a radical from the group comprising or R<1> and R<2> independently of one another stand for hydrogen, C1-C8-alkyl, C3-C8-cycloalkyl, C3-C6-alkenyl, C3-C6-alkynyl, or C1-C4-alkyl which is substituted by C1-C4-alkoxy or , or R<1> and R<2> together stand for a C4-C6-alkylene bridge or a C4-C6-alkylene bridge which is interrupted by oxygen, sulphur, SO, SO2, NH or -N(C1-C4-alkyl)-, R<3> stands for hydrogen or C1-C4-alkyl, R and R independently of one another stand for hydrogen, halogen, cyano, nitro, trifluoromethyl, C1-C4-alkyl, C1-C4-alkoxy, C1-C4-alkylthio, C1-C4-alkylsulphinyl, C1-C4-alkylsulphonyl, -COOR, -CONRR, -COR, -SO2NRR or -OSO2-C1-C4-alkyl, or R and R together stand for a C3-C4-alkylene bridge which can be substituted by halogen or C1-C4-alkyl, or a C3-C4-alkylene bridge which can be substituted by halogen or C1-C4-alkyl, or a C4-alkadienylene bridge which can be substituted by halogen or C1-C4-alkyl, and R and R independently of one another stand for hydrogen, halogen, C1-C4-alkyl, trifluoromethyl, methoxy, methylthio or -COOR, where R denotes hydrogen, halogen, C1-C4-alkyl or methoxy, R denotes hydrogen, halogen, nitro, C1-C4-alkyl, C1-C4-alkoxy, C1-C4-alkylthio, C1-C4-alkylsulphinyl, C1-C4-alkylsulphonyl, -COOR or -CONRR, R denotes hydrogen, halogen, C1-C4-alkyl, -COOR, trifluoromethyl or methoxy, or R and R together stand for a C3-C4-alkylene bridge, R denotes hydrogen, halogen or C1-C4-alkyl, R and R independently of one another denote hydrogen, halogen, C1-C4-alkyl, C1-C4-alkoxy, C1-C4-alkylthio, -COOR<4>, trifluoromethyl, nitro or cyano, R, R and R independently of one another denote hydrogen or C1-C4-alkyl, R and R together form a C4-C6-alkylene bridge or a C4-C6 alkylene bridge which is interrupted by oxygen, NH or -N(C1-C4-alkyl)-, and R denotes C1-C4-alkyl, phenyl or phenyl which is substituted by halogen, C1-C4-alkyl, methoxy, nitro or trifluoromethyl.