Li Y, Yang K, Cao L. Copper-catalyzed [3+3] annulation of ketones with oxime acetates for the synthesis of pyridines.
RSC Adv 2022;
12:27546-27549. [PMID:
36276018 PMCID:
PMC9516370 DOI:
10.1039/d2ra05050a]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Accepted: 09/19/2022] [Indexed: 09/19/2023] Open
Abstract
A novel and efficient copper-catalyzed strategy for the synthesis of diverse pyridines through the [3+3] annulation of ketones with oxime acetates has been reported. It is very convenient to obtain various unsymmetrical 2,6-diarylpyridines by changing different substrates. The rare copper-catalyzed direct difunctionalization of saturated ketones for the synthesis of nitrogen heterocycles is developed. This protocol has excellent functional group tolerance, readily available raw materials, high chemoselectivity and broad substrate scope.
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