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Issue 1, 2017
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Copper-mediated annulation of 2-(1-arylvinyl) anilines and aryl nitrosos towards 2,3-diaryl-2H-indazoles

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Abstract

A copper-mediated annulation of 2-(1-substituted vinyl) anilines and aryl nitrosos is developed for the synthesis of 2,3-diaryl pyrazoles. Compared with previously reported sequential azobenzene C–H ortho-acylation, reduction and cyclization procedures towards such frameworks, no external reductant was required during this cyclization, where the vinyl served as a formal innate reductant. Moreover, in this procedure, no selectivity was involved in the case of Ar1 ≠ Ar2.

Graphical abstract: Copper-mediated annulation of 2-(1-arylvinyl) anilines and aryl nitrosos towards 2,3-diaryl-2H-indazoles

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The article was received on 13 Sep 2016, accepted on 19 Oct 2016 and first published on 20 Oct 2016


Article type: Research Article
DOI: 10.1039/C6QO00540C
Citation: Org. Chem. Front., 2017,4, 22-25
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    Copper-mediated annulation of 2-(1-arylvinyl) anilines and aryl nitrosos towards 2,3-diaryl-2H-indazoles

    W. Hu, J. Yu, S. Liu, Y. Jiang and J. Cheng, Org. Chem. Front., 2017, 4, 22
    DOI: 10.1039/C6QO00540C

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