Enantioselective, copper(I)-catalyzed three-component reaction for the synthesis of β,γ-alkynyl α-amino acid derivatives

The first catalytic asymmetric three-component reaction of ethyl glyoxylate, para-anisidine, and aliphatic, aromatic alkynes catalyzed by CuOTf·0.5C6H6/pybox 7 has been developed. The protocol provided the corresponding chiral β,γ-alkynyl α-amino acid derivatives in good yields and 66–74% ee.

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