Fan Y, Lu J, Sha F, Li Q, Wu XY. Cu(I)-Catalyzed Asymmetric Mannich Reaction of Glycine Schiff Bases to Ketimines.
J Org Chem 2019;
84:11639-11648. [PMID:
31449410 DOI:
10.1021/acs.joc.9b01566]
[Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A copper-catalyzed asymmetric Mannich reaction between glycine Schiff bases and ketimines has been developed. This method afforded 2-oxindole-based chiral syn-α,β-diamino acid derivatives in high yields (89-99%) with good to excellent diastereoselectivities (≤98:2 dr) and excellent enantioselectivities (95-99% ee).
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