Abstract
MgO nanoparticles were prepared by an improved sol–gel technique which appeared to have narrow size distributions. The synthesized magnesium oxide nanoparticles were used as an efficient catalyst in aza-Michael reaction for addition of amines to a series of α,β-unsaturated carbonyl compounds and nitro olefins under solvent-free conditions at room temperature to afford high yields of the β-amino carbonyl and β-nitro amines. The catalyst can be recovered and reused at least five successive runs without loss of activity.
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