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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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URI: http://hdl.handle.net/2183/35151
DOI: 10.1039/C8QO00457A

Publication date

2018-06-15

Authors

Alonso-Marañón, Lorena
Martínez, M. Montserrat

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Alonso-Marañón, L., Sarandeses, L. A., Martínez, M. M., & Sestelo, J. P. (2018). Synthesis of fused chromenes by the indium(III)-catalyzed cascade hydroarylation/cycloisomerization reactions of polyyne-type aryl propargyl ethers. Organic Chemistry Frontiers, 5(15), 2308-2312. https://doi.org/10.1039/C8QO00457A

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Abstract

[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.

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https://doi.org/10.1039/C8QO00457A

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