Derivative of carboxylic acid ester, process of its preparation and insecticidal agent containing thereof

摘要

Described are derivatives of esters of carboxylic acids represented by the general formula (I), wherein R1 is an alkyl group having a chain or branched chain of 1 to 4 carbon atoms; and R2 is a group represented by the general formulae (IV), wherein the substituents are described in description. Further is described process of its preparation and the agents containing the same as an active ingredient. The compounds represented by the general formula (I) are useful ingredients of insecticides.