METHOD FOR PRODUCING SULFONYL URINE SALTS, NEW SULFONYL URINE SALTS AND THEIR USE AS HERBICIDES

摘要

The invention relates to a novel process for the preparation of herbicidally active sulphonylurea salts of the general formula (I) IMAGE in which M(+) is an alkali metal ion or the counterion of a basic organic nitrogen compound, formed by protonation, R is haloalkyl, X is N or CH, Y is N or CR3, Z is N or CR4 and the radicals R1, R2, R3 and R4 have the meanings given in the description, which is characterised in that sulphonylureas of the general formula (II) IMAGE are reacted with alkali metal hydroxides or with basic organic nitrogen compounds in the presence of hydrocarbons as diluents at temperatures between 0 DEG C and 100 DEG C, and the products obtained in this process in crystalline form are isolated by customary methods. The sulphonylurea salts of the formula (I) in which Y is nitrogen are novel and are also a subject of the present invention.