Enantioselective Synthesis of Fluorinated α-Amino Acids and Derivatives in Combination with Ring-Closing Metathesis:  Intramolecular π-Stacking Interactions as a Source of Stereocontrol

Hydride reduction of CN bonds stereocontrolled by intramolecular π-stacking interactions of 1-naphthylsulfinyl and N-aryl groups, nonoxidative Pummerer rearrangement, and ring-closing metathesis are efficiently combined in a highly stereoselective entry to enantiomerically pure cyclic and acyclic fluorinated β-amino alcohols and α-amino acid derivatives, respectively.