Michael Addition of Ketone Enolates to α,β-Unsaturated Esters or Amides in a One-Pot Procedure: Highly Efficient Effect of Lithium Salt Generated in situ on Organotin Enolate - Yasuda, Makoto; Shigeyoshi, Yusuke; Shibata, Ikuya; Baba, Akio (Synthesis, 2005)