Gold(I)-Catalyzed Oxidative Cascade Cyclization of 1,4-Diyn-3-ones for the Construction of Tropone-Fused Furan Scaffolds

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Description

Gold(I)-catalyzed cascade cyclization of 1, 4-diyn-3-ones with a pyridine N-oxide enabled direct construction of a benzo[6, 7]cyclohepta[1, 2-b]furan scaffold with the formation of four bonds. This reaction would proceed through oxidative cyclization, alkynyl migration, and 5-endo-dig type cyclization. Synthesis of benzotropone-fused naphtho[1, 2-b]furans through a two-step sequence, including epoxidation and In(OTf)₃-catalyzed intramolecular carbon–carbon bond formation, is also presented.

Journal

  • Organic Letters

    Organic Letters 20 (15), 4401-4405, 2018-08-03

    American Chemical Society

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