Preparing herbicidal sulphonylurea salts

Abstract

A herbicidal sulphonylurea salt of the formula ##STR1## in which M.sup..sym. represents an alkali metal ion or the counterion, formed by protonation, of a basic organic nitrogen compound, R represents halogenoalkyl, R.sup.1 represents optionally substituted radicals from the series comprising alkyl, alkenyl, alkinyl or aralkyl, R.sup.2 represents hydrogen, halogen, alkyl, halogenoalkyl, alkoxy, halogenoalkoxy, alkylthio, halogenoalkylthio, amino, alkylamino or dialkylamino, X represents nitrogen or a --CH group, Y represents nitrogen or a --CR.sup.3 group where R.sup.3 represents hydrogen, halogen, cyano, alkyl, formyl, alkyl-carbonyl or alkoxy-carbonyl, and Z represents nitrogen or a --CR.sup.4 group where R.sup.4 represents hydrogen, halogen, alkyl, halogenoalkyl, alkoxy, halogenoalkoxy, alkylthio, alkylamino or dialkylamino.

Dependencies are inferred from the claim text.