An effective synthesis of bromoesters from aromatic aldehydes using tribromide ionic liquid based on l-prolinol as reagent and reaction medium under mild conditions

Abstract

Two kinds of ionic liquids have been directly synthesized from L-prolinol by a simple and convenient method in excellent yields. The application of the ionic liquids as reagents and solvents for the chemoselective, regioselective, and stereoselective synthesis of 1,2- or 1,3-bromoesters from aromatic aldehydes and 1,2- or 1,3-diols at room temperature has been studied. Good to excellent yields and moderate enantiomeric excesses were obtained under these reaction conditions