Synthesis of fused chromenes by the indium(III)-catalyzed cascade hydroarylation/cycloisomerization reactions of polyyne-type aryl propargyl ethers
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DOI: 10.1039/c8qo00457a
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… read more here.
Keywords: hydroarylation; hydroarylation cycloisomerization; cascade hydroarylation; fused chromenes ... See more keywords