Zhao C, Li F, Wang J. N-Heterocyclic Carbene Catalyzed Dynamic Kinetic Resolution of Pyranones.
Angew Chem Int Ed Engl 2015;
55:1820-4. [PMID:
26546390 DOI:
10.1002/anie.201508205]
[Citation(s) in RCA: 97] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Revised: 10/13/2015] [Indexed: 11/06/2022]
Abstract
The dynamic kinetic resolution of 6-hydroxypyranones with enals or alkynals through an asymmetric redox esterification is catalyzed by a chiral N-heterocyclic carbene. The resulting esters are obtained in good to high yields and with high levels of enantio- and diastereocontrol. The reaction products are further derivatized to obtain functionalized sugar derivatives and natural products.
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