“contra-Michael” Addition of Alkyllithiums to Silicon- and Phenyl-substituted α,β-Unsaturated Amides in the Presence of t-BuOK
Carbolithiation of 3-(trimethylsilyl)acrylamide and cinnamamide derivatives gave the corresponding 3-substituted (Michael) and/or 2-substituted (contra-Michael) adducts. The regioselectivity depend...