Li S, Ren J, Ding C, Wang Y, Ma C.
N,
N-Dimethylformamide as Carbon Synthons for the Synthesis of
N-Heterocycles: Pyrrolo/Indolo[1,2-
a]quinoxalines and Quinazolin-4-ones.
J Org Chem 2021;
86:16848-16857. [PMID:
34807611 DOI:
10.1021/acs.joc.1c02067]
[Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
N,N-dimethylformamide (DMF) as synthetic precursors contributing especially the methyl, acyl, and amino groups has played a significant role in heterocycle syntheses and functionalization. In this protocol, a wide range of pyrrolo/indolo[1,2-a]quinoxalines and quinazolin-4-ones were obtained in moderate to good yields by using elemental iodine without any metal or peroxides. We considered that N-methyl and N-acyl of DMF participate and complete the reaction separately through different mechanisms, which displayed potential still to be explored of DMF.
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