Process for the preparation of cyclopropane derivatives, intermediates in the synthesis of pyrethroid insecticides
申请人:IMPERIAL CHEMICAL INDUSTRIES PLC
公开号:EP0007154A1
公开(公告)日:1980-01-23
Compounds of formula:
wherein both groups X are chlorine, bromine or trifluoromethyl, or one X is chlorine or bromine and the other is trifluoromethyl, and Y is -CN or -COOR in which R is an alkyl group, are obtained by (A) reacting a compound of the formula:
wherein X1 is chlorine or bromine, with a compound of the formula:
in the presence of metallic copper or at least one copper salt I and a base, or (B) reacting a compound of the formula:
with a compound of the formula:
and chlorine or bromine, in the presence of at least one reducible copper salt and a base, or (C) reacting a compound of formula:
with a compound of the formula:
wherein X1 is chlorine or bromine, in the presence of at least one copper salt.
式中的化合物
其中两个基团 X 均为氯、溴或三氟甲基,或一个 X 为氯或溴,另一个为三氟甲基,且 Y 为 -CN 或 -COOR,其中 R 为烷基的式化合物,是通过 (A) 使式化合物......与式化合物......反应而得到的:
式中 X1 为氯或溴的化合物与式中的化合物反应:
在金属铜或至少一种铜盐 I 和碱存在下,或 (B) 将式:
与式
和氯或溴,在至少一种还原性铜盐和碱存在下反应,或 (C) 将式:
与式
其中 X1 为氯或溴,在至少一种铜盐存在下反应。