2-PERHALOGENALKYL-SUBSTITUTED BENZIMIDAZOLES, THEIR PREPARATION AND THEIR USE AS PESTICIDES

摘要

The invention relates to new substituted benzimidazoles of the general formula (I) <IMG> in which R1 represents hydrogen, alkyl or optionally substituted aryl, R2 represents hydroxyl, cyano, alkoxy or optionally substituted amino, R3 represents perhalogenoalkyl, and X1, X2, X3 and X4, independently of one another, in each case represent hydrogen, halogen, nitro or optionally substituted aryloxy, but with at least one of the substituents X1, X2, X3 or X4 being different from hydrogen, with the exception of the compound 1-cyanomethyl-2-trifluoromethyl-5,6- dichlorbenzimidazole, to their preparation and to their use as agents for combating pests.