作者:Yuan Xiong、Scott E. Schaus、John A. Porco
DOI:10.1021/ol400631b
日期:2013.4.19
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.