The invention provides a process for the preparation of esters [2-[4-[(4-chlorophenyl)phenylmethyl]-1-piperazinyl]ethoxy]acetic acid, of the formula (I) ##STR1## wherein X represents a halogen atom and R represents a lower alkyl group comprising reacting: (a) a compound of the formula (II) ##STR2## (b) a compound of the formula (III) ##STR3## and (c) a tertiary amine as a solvent and as an acid scavenger at a temperature of at least 100.degree. C., wherein X is a halogen atom, X' is selected from the group consisting of bromine and chlorine and R is a lower alkyl group.
本发明提供了一种制备
酯类[2-[4-[(4-
氯苯基)苯基甲基]-1-
哌嗪基]乙氧基]
乙酸的方法,该
酯类的
化学式为(I) ##STR1## 其中,X代表卤素原子,R代表低碳基;包括以下反应步骤:(a)化合物II的化合物 ##STR2## (b)化合物III的化合物 ##STR3## 和(c)三级胺作为溶剂和酸中和剂,在至少100°C的温度下反应,其中X是卤素原子,X'选自
溴和
氯,R是低碳基。