Wang Y, Wang G, Zhu Y, Dong K. Chiral phosphoric acid-catalyzed transfer hydrogenation of 3,3-difluoro-3
H-indoles.
Beilstein J Org Chem 2024;
20:205-211. [PMID:
38318457 PMCID:
PMC10840539 DOI:
10.3762/bjoc.20.20]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Accepted: 01/25/2024] [Indexed: 02/07/2024] Open
Abstract
A convenient and efficient method for the synthesis of optically active difluoro-substituted indoline derivatives starting from the corresponding 3H-indoles by chiral phosphoric acid-catalyzed transfer hydrogenation was developed. Using Hantzsch ester as the hydrogen source under mild reaction conditions, the target products can be obtained with excellent yield and enantioselectivity.
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