An improved process for the preparation of certain cyclopropane pyrethroid intermediates having a high cis-content
申请人:IMPERIAL CHEMICAL INDUSTRIES PLC
公开号:EP0051355A1
公开(公告)日:1982-05-12
"High cis" 3-[2,2-di(chloro or bromo)-3,3,3- trifluoropropyl]- or 3-[2,2;2-tri(chloro or bromo)ethyl]- 2,2-dimethylcyclopropane-1-carboxylates are obtained by reaction of the corresponding 3,3-dimethyl-4- halogenoheptanoate or ;hexanoate with an alkali metal tert. alkoxide in a nitrile, a pyridine, an ester or a morpholine as solvent.
"高顺式 "3-[2,2-二(氯或溴)-3,3,3-三氟丙基]-或 3-[2,2;2-三(氯或溴)乙基]-2,2-二甲基环丙烷-1-羧酸盐是通过相应的 3,3-二甲基-4-卤代庚酸盐或;己酸盐与碱金属叔烷氧基化合物在作为溶剂的腈、吡啶、酯或吗啉中反应而得到的。