Wang K, Du X, Zhang P, Wei Z, Cao XT. Metal-free C-3 selective C(sp
2)-C(sp
3) heteroarylation of anilines with imidazo[1,2-
a]pyridine derivatives
via cross-dehydrogenative coupling.
RSC Adv 2023;
13:21685-21689. [PMID:
37476046 PMCID:
PMC10355276 DOI:
10.1039/d3ra03852a]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Accepted: 07/09/2023] [Indexed: 07/22/2023] Open
Abstract
A general and straightforward method for the regioselective construction of C-3 heteroaryl-containing imidazo[1,2-a]pyridines via cross-dehydrogenative coupling under transition-metal-free conditions has been reported, utilizing N,N-dimethylaniline as the methylenation source and furnishing the C(sp2)-C(sp3) functionalized products in good to excellent yields. Mechanism studies indicate that a radical pathway is responsible for this transformation.
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