Abstract

A FACILE ONE-POT SYNTHESIS OF WEINREB AMIDES FROM CARBOXYLIC ACIDS WITH POCL3

Ravi Lakkakula, Arnab Roy, Khagga Mukkanti and Mendu Narender*

Abstract

Conversion of carboxylic acids to Weinreb amides in one pot by using N,O-dimethyl hydroxylamine hydrochloride and phosphorus (V) oxychloride (POCl3) in presence of Hunig’s base in dichloromethane at room temperature in excellent yields. This method demonstrated for sterically hindered carboxylic acids and also various functional groups which are tolerated on the carboxylic acids.

Keywords: Weinreb amides, Phosphorous oxychloride, Hunig’s base.