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Metal-catalyzed cascade rearrangements of 3-alkynyl flavone ethers.

ABSTRACT: Metal-mediated rearrangements of 3-alkynyl flavone ethers are reported. The overall process involves 5-endo enyne cyclization to a platinum-containing spiro-oxocarbenium intermediate which may be trapped with methanol to produce spirodihydrofurans or further rearranged to afford either allenyl chromanediones or benzofuranones.

SUBMITTER: Xiong Y 

PROVIDER: S-EPMC3773515 | biostudies-literature | 2013 Apr

REPOSITORIES: biostudies-literature

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Metal-catalyzed cascade rearrangements of 3-alkynyl flavone ethers.

Xiong Yuan Y   Schaus Scott E SE   Porco John A JA  

Organic letters 20130410 8

Metal-mediated rearrangements of 3-alkynyl flavone ethers are reported. The overall process involves 5-endo enyne cyclization to a platinum-containing spiro-oxocarbenium intermediate which may be trapped with methanol to produce spirodihydrofurans or further rearranged to afford either allenyl chromanediones or benzofuranones. ...[more]

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