2-(2-Hydroxymethyl-3,3-dimethylcyclopropyl)ethanal dimethyl acetal and process for its preparation

摘要

K 361 Novel intermediate in the manufacture of pyrethroid insecticides has the following formula The compound preferably has the same stereochemical form as the cyclopropane ring in (+)-3-carene, The novel intermediate can be prepared by a process which comprises hydrolysing under alkaline conditions 1-(2,2-dimethoxyethyl)-3,3-dimethylcyclo-propylmethyl acetate, the latter compound being preferably derived from (+)-3-carene.