A process is provided for production of an alkyl 2-[para-(2-2-dihalocyclopropyl)phenoxy]-2-lower alkyl propionate which comprises treating an alkyl 2-[4-(1-hydroxyethyl)-phenoxy)-2-lower alkyl propanoate (IV) with a phosphorus halide and then with an organic base to produce the corresponding substituted styrene and then treating said styrene with a haloform, a strong alkali and a phase transfer catalyst. This process has given overall yields ten-fold greater than those described in the literature.
本发明提供了一种生产 2-[对位-(2-2-二环丙基)苯氧基]-2-低级烷基
丙酸烷基酯的工艺,该工艺包括用
卤化磷处理 2-[4-(1-羟乙基)-苯氧基]-2-低级烷基
丙酸烷基酯 (IV),然后用有机碱生成相应的取代
苯乙烯,再用卤代烃、强碱和相转移催化剂处理所述
苯乙烯。 该工艺的总产量比文献中描述的产量高十倍。