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An efficient aza-Michael addition of secondary amines to some α,β-unsaturated esters has been carried out using LiCLO4 as a catalyst. β-amino esters were obtained in high yields at room temperature without using solvent.

LiClO4 CATALYZED AZA-MICHAEL ADDITION OF SECONDARY AMINES TO α,β-UNSATURATED ESTERS UNDER A SOLVENT-FREE CONDITION