Jiang W, Zhuge J, Li J, Histand G, Lin D. Direct Sulfenylation of the Purine C
8-H Bond with Thiophenols.
J Org Chem 2020;
85:2415-2425. [PMID:
31898455 DOI:
10.1021/acs.joc.9b03115]
[Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The one-step copper-mediated regioselective formation of the C8-S bond for purine derivatives with arylthiols was achieved using air as the green oxidant in the presence of 1.0 equiv of Na2CO3 and stoichiometric CuCl and 1,10-phenanthroline monohydrate. This method provides an economical, easy-to-handle, and effective method for the synthesis of 8-sulfenylpurine derivatives in moderate to excellent yields. The reaction is selective for C8 over C2 and C6. It also tolerates a free amine on the purine, and it has a wide substrate scope.
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