Provided is a method for producing a chlorophenoxycarboxylate, comprising the following steps of: a phenoxycarboxylate under actions of a catalyst A and a catalyst B performing a selective chlorination of a chlorinating agent at a 2-position and/or a 4-position to obtain the chlorophenoxycarboxylate; the catalyst A is a Lewis acid; and the catalyst B has the following structure: R1′—S—R2′. The present disclosure redesigns the process route, and finely screens the catalyst and the chlorinating agent, thereby effectively improving the chlorination selectivity while avoiding the loss of the active ingredient, and the content of the obtained chlorophenoxycarboxylate can reach more than 98.5%, and the yield can reach more than 99%.
本发明提供了一种生产
氯苯氧
羧酸酯的方法,包括以下步骤:苯氧
羧酸酯在催化剂 A 和催化剂 B 的作用下,在 2 位和/或 4 位上对
氯化剂进行选择性
氯化,以获得
氯苯氧
羧酸酯;催化剂 A 是
路易斯酸;催化剂 B 具有以下结构:R1′-S-R2′。本发明重新设计了工艺路线,对催化剂和
氯化剂进行了精细筛选,从而在避免有效成分损失的同时,有效提高了
氯化选择性,得到的
氯苯氧
羧酸酯含量可达98.5%以上,收率可达99%以上。