Process for the preparation of 5 - amino - 1 - aril - pirazois replaced, the herbicides to combat weeds and processes for the preparation of the

摘要

Herbicidally active substituted 5-amino-1-aryl-pyrazoles of the formula IMAGE in which R represents hydrogen, cyano, nitro or alkoxycarbonyl, R1 represents hydrogen or alkyl, R2 and R3 independently of one another in each case represent alkyl, alkenyl, alkinyl, halogenoalkyl, alkoxyalkyl, cycloalkyl, alkoxy or cycloalkoxy, or represent in each case optionally substituted aryl, aryloxy, aralkyl or aralkyloxy, X represents oxygen or sulphur and Ar represents in each case optionally substituted phenyl or pyridyl, or salts thereof.