申请人:SHELL INTERNATIONALE RESEARCH
MAATSCHAPPIJ B.V.
公开号:EP0067461A1
公开(公告)日:1982-12-22
A method for preparing a pyrethroid insecticide of general formula:
wherein the two hydrogen atoms on the cyclopropane ring are in the cis- configuration, in which an acid of formula:
is neutralised with a water-soluble base and then reacted in the presence of a phase-transfer catalyst with a solution in a substantially water-immiscible organic solvent of an alpha-cyanobenzyl aryl sulphonate of formula:
the substituents in the formulae having the following meanings; A represents an optionally substituted aryl group; R, and R2 represent hydrogen or halogen; and R3 and R4 represent chlorine, bromine, or methyl.
一种制备通式为: 其中环丙烷环上的两个氢原子为顺式构型的拟除虫菊酯杀虫剂的方法,在该方法中,通式为: 的酸与水溶性碱中和,然后在相转移催化剂存在下与通式为: 的α-氰基苄基芳基磺酸盐在基本上不溶于水的有机溶剂中的溶液反应,式中取代基的含义如下;A 代表任选取代的芳基;R 和 R2 代表氢或卤素;R3 和 R4 代表氯、溴或甲基。