One-Pot Synthesis of Optically Active β-Amino-α-methylene Carbonyl Derivatives From α-Amidosulfones Using Quinine-Based Phase-Transfer Catalysts

Optically active β-amino-α-methylene carbonyl derivatives (aza-Morita−Baylis−Hillman adducts) were prepared using a one-pot protocol involving an enantioselective Mannich reaction catalyzed by vari...