Wu J, Zhao L, Yang ML, Ding MW. Four-Component Synthesis of Polysubstituted Pyrazin-2(1
H)-ones through a Ugi/Staudinger/Aza-Wittig/Isomerization Sequence.
J Org Chem 2021;
86:10755-10761. [PMID:
34251829 DOI:
10.1021/acs.joc.1c00735]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
A new efficient synthesis of polysubstituted pyrazin-2(1H)-ones via the sequential Ugi/Staudinger/aza-Wittig/isomerization reaction has been developed. The four-component Ugi reactions of arylglyoxals 1, primary amines 2, α-azidovinyl acids 3, and isocyanides 4 produced the azides 5, which were treated with triphenylphosphine to give pyrazin-2(1H)-ones 6 in good yields through domino Staudinger/aza-Wittig/isomerization reactions.
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