Highly Enantioselective Conjugate Addition of Glycine Imines to Activated Alkenes Catalyzed by Amino‐Acid‐Derived Chiral Phosphonium Salts

Chiral quaternary phosphonium salts derived from amino acids were readily prepared and employed as phase‐transfer catalysts for the highly enantioselective conjugate addition of glycine imines to various activated alkenes, including chalcones, acrylates, and vinyl ketones.