Enantiomerically Enriched Allylglycine Derivatives through the Catalytic Asymmetric Allylation of Iminoesters and Iminophosphonates with Allylsilanes

α-Amino acid derivatives are obtained in high yields through the catalytic enantioselective allylation of iminoesters using environmentally benign allylsilanes as nucleophiles in the presence of a copper complex prepared from Cu(OTf)2 and a chiral diamine (see scheme; Tf=trifluoromethanesulfonyl, Nap=naphthyl). The reaction is also extended to iminophosphonates.