| abstract |
N-Phenylsulfonyl-N'-pyrimidinyl- and -triazinyl ureas of the general formula <IMAGE> and the salts of these compounds with amines, with alkali metal bases or alkaline earth metal bases or with quaternary ammonium bases, possess good selective, pre-emergent and post-emergent, herbicidal properties. In this formula A denotes a C1-C6-alkyl radical which is substituted by halogen, C1-C4-alkoxy, C1-C4-alkylthio, C1-C4-alkylsulfinyl, C1-C4 -alkylsulfonyl, C1-C4-haloalkoxy, C1-C4-haloalkylthio, C1-C4-haloalkylsulfinyl or C1-C4-haloalkylsulfonyl, or denotes a C2-C6-alkenyl radical which is optionally substituted by the enumerated substituents, E denotes the methine group or nitrogen, X denotes oxygen, sulphur, or a sulfinyl or sulfonyl bridge, Z denotes oxygen or sulphur, m denotes the number one or two, R1 denotes hydrogen, halogen, C1-C5-alkyl, C2-C5-alkenyl, or a radical -Y-R5, R2 denotes hydrogen, halogen, C1-C5-alkyl, C2-C5-alkenyl, C1-C4-haloalkyl, or a radical -Y-R5, -COOR6, -NO2 or -CO-NR7R8, R3 and R4, independently of each other, denote hydrogen, C1-C4-alkyl, C1-C4-alkoxy, C1-C4-alkylthio, C1-C4- haloalkyl, halogen or alkoxyalkyl having at most 4 carbon atoms, R5 and R6 in each case denote C1-C5-alkyl, C2-C5-alkenyl or C2-C6-alkynyl R7 and R8, independently of each other, denote hydrogen, C1-C5-alkyl, C2-C5-alkenyl or C2-C6-alkynyl, and Y denotes oxygen, sulphur, or a sulfinyl or sulfonyl bridge. |