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Issue 15, 2018
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Synthesis of fused chromenes by the indium(III)-catalyzed cascade hydroarylation/cycloisomerization reactions of polyyne-type aryl propargyl ethers

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Abstract

Fused 2H-chromenes are prepared by the cascade hydroarylation/cycloisomerization reactions of polyyne-type aryl propargyl ethers using indium(III) catalysis. The transformation proceeds with 6-endo-dig regioselectivity using InBr3 (5 mol%). The method can be extended to triynes allowing the formation of three bonds in one pot. Indium(III) also catalyzes the hydroamination/hydroarylation cascade reaction of o-aryldiynyl anilines to form fused carbazoles.

Graphical abstract: Synthesis of fused chromenes by the indium(iii)-catalyzed cascade hydroarylation/cycloisomerization reactions of polyyne-type aryl propargyl ethers

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Publication details

The article was received on 07 May 2018, accepted on 14 Jun 2018 and first published on 15 Jun 2018


Article type: Research Article
DOI: 10.1039/C8QO00457A
Citation: Org. Chem. Front., 2018,5, 2308-2312
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    Synthesis of fused chromenes by the indium(III)-catalyzed cascade hydroarylation/cycloisomerization reactions of polyyne-type aryl propargyl ethers

    L. Alonso-Marañón, L. A. Sarandeses, M. M. Martínez and J. Pérez Sestelo, Org. Chem. Front., 2018, 5, 2308
    DOI: 10.1039/C8QO00457A

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