- Metal-catalyzed cascade rearrangements of 3-alkynyl flavone ethers.
Metal-catalyzed cascade rearrangements of 3-alkynyl flavone ethers.
Organic letters (2013-04-12)
Yuan Xiong, Scott E Schaus, John A Porco
PMID23574045
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.
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