PROCEDE POUR LA PREPARATION DES 1,3,4-THIADIAZOLE-2-ILE-CARBAMIDE

摘要

The novel urea derivatives of the formula (I) are employed as active ingredient in selective herbicides. In the urea derivatives of the formula (I) the substituents have the meanings given in Patent Claim 1, and n is 1 or 2. Processes for the preparation of the novel urea derivatives of the formula (I) are also described. The novel selective herbicides have a good activity against weeds and can be used for controlling the latter in a range of crops of useful plants, for example crops of groundnuts, potatoes, maize and peas.