Pyrethroids and their preparation, their pesticidal composition; intermediates and their preparation

摘要

There are described 3-phenoxy-benzyl or a-cyano-3-phenoxy-benzyl esters of 2,2-dimethyl- cyclopropanecarboxylic acids substituted in position 3 by a dienic polyhalogenated chain, as well as their use as insecticides and acaricides. Moreover, there are also described the intermediates for their preparation and the synthesis processes.