Li W, Wang Y, Xu D. Asymmetric synthesis of β-amino ketones by using cinchona alkaloid-based chiral phase transfer catalysts.
Org Biomol Chem 2018;
16:8704-8709. [PMID:
30411772 DOI:
10.1039/c8ob02484g]
[Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A highly enantioselective nucleophilic addition of ketones to imines catalyzed by chiral phase-transfer catalysts (N-quaternised cinchona alkaloid ammonium salts) has been developed, and the process affords the Mannich reaction products with tertiary stereocenters in good to high yields (up to 95%) with excellent enantioselectivities (up to 97% ee).
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