申请人:FMC Corporation
公开号:US04526987A1
公开(公告)日:1985-07-02
Lactones of the formula ##STR1## wherein R is hydrogen or a CX.sub.3 group, and each X is a chlorine or bromine atom, are converted to the known cis-3-(2,2-dihalovinyl)-2,2-dimethylcyclopropanecarboxylic acids or lower alkyl esters, from which pyrethroid insecticides are obtained.
公式为 ##STR1## 的内酯,其中R是氢或CX.sub.3基团,每个X都是氯或溴原子,被转化为已知的顺式-3-(2,2-二卤乙烯基)-2,2-二甲基环丙烷羧酸或较低的烷基酯,从中获得拟除虫菊酯类杀虫剂。