LiCO4/Et3N: Highly efficient and active catalyst for selective Michael addition of active methylene compounds under solvent-free condition

A simple catalyst LiClO4/Et3N has been developed and demonstrated to efficiently catalyze Michael addition reactions of active methylene compounds to conjugated ketones, nitriles, esters and nitroalkenes with remarkably high yields and in short reaction time. The Michael addition to nitroalkenes and α,β-unsaturated ketones proceeds quantitatively in the usual way, giving the monoaddition product.

Graphical abstractA simple catalyst LiClO4/Et3N has been developed and demonstrated to efficiently catalyze Michael addition reactions of active methylene compounds to conjugated ketones, nitriles, esters and nitroalkenes with remarkably high yields and short reaction time. The Michael addition to nitroalkenes and α,β-unsaturated ketones proceeds quantitatively in the usual way, giving the monoaddition products.Figure optionsDownload full-size imageDownload as PowerPoint slide