Highly Diastereoselective Switchable Enantioselective Mannich Reaction of Glycine Derivatives with Imines

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Abstract

Tuning of diastereoselectivity was realized in the Mannich reaction of glycine derivatives with aromatic and aliphatic N-Ts imines using CuClO4-FcPHOX ligand 4b and 4f having an MeO group at the 4-position and F atom at the 3,5-position of the phenyl ring on the P-atom respectively as catalyst, providing either anti- or syn-alpha,beta-diamino acid derivatives in high yields and in high diastereo- and enantioselectivities.

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