| 摘要 |
- 4 - HOE 91/F 071 of the disclosure Process for the preparation of sulfonylureas Herbicidal sulfonylureas of the formula I, (I) in which X is -O-, -O-NR2- or -SO2-NR2-, Y is -N- or CH, R1 is (substituted) alkyl, (substituted~ alkenyl or (substituted) alkynyl, or else, where X = O, (substituted) phenyl, RZ is H, alkyl, alkenyl, alkynyl or cycloalkyl, R3, R4 are H, (substituted) alkyl or (substituted) alkoxy, halogen, alkylthio, alkylamino or dialkylamino and R5, R6 are H or alkyl, and their salts with acids or bases, are prepared by reacting compounds of the formula II (II) with compounds of the formula III (III).
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