PYRAZOL-4-YL N-ALKYLCARBAMATES, PROCESSES FOR THEIR PREPARATION, AND THEIR USE AS PEST-COMBATING AGENTS

摘要

New pyrazol-4-yl N-alkylcarbamates of the general formula (I) in which R1 represents an optionally substituted alkyl group having more than one carbon atom or an alkenyl, alkinyl or cycloalkyl group, and R2 represents an optionally substituted alkyl, alkenyl, alkinyl, cycloalkyl, aralkyl or aryl group, can be obtained if a 4-hydroxypyrazole of the general formula (II) is reacted with an isocyanate of the general formula R1-N=C=O (III) or with a carbamoyl halide of the general formula R1-NH-CO-Hal (IV). The new compounds are distinguished by a high degree of activity as pest-combating agents, in particular by their insecticidal and nematicidal activity.