Lithium Acetate-catalyzed Michael Reaction between Trimethylsilyl Enolate and (alpha),(beta)-Unsaturated Carbonyl Compound

Lithium acetate-catalyzed Michael reaction between trimethylsilyl enolates and (alpha),(beta)-unsaturated carbonyl compounds in DMF proceeded smoothly to afford the corresponding Michael-adducts in good to high yields. Hindered (alpha),(beta)-unsaturated ketones also behaved as an excellent Michael-acceptor in the above reaction at room temperature.