| abstract |
Abstract A process for preparing a sulphonylurea salt of the formula (I) in which M? represents an alkali metal ion or the counterion, formed by protonation, of a basic organic nitrogen compound, R represents halogenoalkyl, R1 represents optionally substituted radicals from the series comprising alkyl, alkenyl, alkinyl ox aral-kyl, R2 represents hydrogen, halogen, alkyl, halogenoalkyl, alkoxy, halogenoalkoxy, alkylthio, halogenoalkyl-thio, amino, alkylamino or dialkylamino, X represents nitrogen or a -CH group, Y represents nitrogen or a -CR3 group where R3 represents hydrogen, halogen, cyano, alkyl, formyl, alkyl-carbonyl or alkoxy-carbonyl, and Z represents nitrogen or a -CR4 group where R4 represents hydrogen, halogen, alkyl, halogeno-alkyl, alkoxy, halogenoalkoxy, alkylthio, alkylamino or dialkylamino, which comprises reacting a sulphonylurea of the formula (II) Le A 27 329 Abstract (continued) with an alkali metal hydroxide or with a basic organic nitrogen compound in the presence of a hydrocarbon as diluent at a temperature from about 0 to 100°C. Compounds wherein Y is nitrogen are new herbicides. Le A 27 329 |