申请人:FMC Corporation
公开号:US04166064A1
公开(公告)日:1979-08-28
A process is described whereby esters of 3-(2,2,2-trichloroethyl)-2,2-dimethylcyclopropane-1-carboxylic acid are prepared predominantly in their cis isomer form. The process comprises treating a 4,6,6,6-tetrachloro-3,3-dimethylhexanoate with an alkali metal tert-alkoxide under controlled conditions of temperature in the presence of a defined solvent-cosolvent mixture. The products of the process are intermediates in the production of pyrethroid insecticides.
本文描述了一种制备3-(2,2,2-三氯乙基)-2,2-二甲基环丙烷-1-羧酸酯的过程,该过程主要制备其顺式异构体形式。该过程包括在定义的溶剂-共溶剂混合物存在下,在温度受控条件下,用碱金属叔丁基氧化物处理4,6,6,6-四氯-3,3-二甲基己酸酯。该过程的产物是拟除虫菊酯类杀虫剂生产中的中间体。