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Although utilization of fluorine compounds has a long history, synthesis of chiral fluorinated amino acid derivatives with structural diversity and high stereoselectivity is still very appealing and challenging. Here, we report a biomimetic study of enantioselective [1,3]-proton shift of  β,β -difluoro- α -imine amides catalyzed by chiral quinine derivatives. A wide range of corresponding  β,β -difluoro- α -amino amides were achieved in good yields with high enantioselectivities. The optically pure  β,β -difluoro- α -amino acid derivatives were further obtained, which have high application values in the synthesis of fluoro peptides, fluoro amino alcohols and other valuable fluorine-containing molecules.

Biomimetic enantioselective synthesis of β,β-difluoro-α-amino acid derivatives