Process for the preparation of 3-ethoxy-4-(alkoxy carbonyl)-phenyl acetic acid. (an intermediate of repaglinide)

摘要

The present invention relates to an improved and convenient process for the preparation of 3-Ethoxy-4-(alkoxy carbonyl)-phenyl acetic acid, which can be represented by formula (Ia) where R<1 >represents ethyl or methyl. Specifically the present invention relates to an improved process for the preparation of compound of formula (Ia), which is the key intermediate for Repaglinide of formula (I), by the process, which involves non-hazardous raw materials with an easy handling, and cost effective process