Regio- and Stereoselective Hydrothiolation Reactions of Ynamides with Diphenyldithiophosphinic Acid: Straightforward Synthesis of KeteneN,S-Acetal Derivatives
Treatment of N-(1-alkynyl)amides and 1-alkynyl sulfides with diphenyldithiophosphinic acid affords (E)-ketene N,S-acetals and S,S-acetals, respectively. The addition reactions proceed in syn fashio...