Pesticidal nitro-substituted heterocyclic compounds

摘要

Nitro-subsliluted heterocyclic compounds of the formula (I) <IMAGE> (I) wherein R is hydrogen or alkyl, Z is an optionally substituted aryl or optionally subtituted heterocyclic groun containing at least one atom selected from N, O and S, A is optionally substituted ethylene or optionally substituted trimethylene, and B stands for 2 or 3 members of a heterocyclic ring which is formed, together with the adjacent C-atom and N-aom and at least one of said members may represent a hetero atom and may be optionally substituted, provided that when B stands for 3 members, two of which are carbon atoms and the other one is a nitrogen atom which is located in the middle of the three members, then at least one of said two carbon atoms must be substituted by a keto group. Such compounds being useful as insecticides.