Cascading Radical Cyclization of Bis-Vinyl Ethers: Mechanistic Investigation Reveals a 5-<i>exo</i>/3-<i>exo</i>/retro-3-<i>exo</i>/5-<i>exo</i> Pathway
作者:Natasha F. O’Rourke、Katherine A. Davies、Jeremy E. Wulff
DOI:10.1021/jo301565u
日期:2012.10.5
an iterative synthesis of oligo-vinyl ethers, followed by a radical cascade to provide a family of hexahydro-2H-furo[3,4-b]pyrans. Our results for the radical cascade were consistent with either a direct 6-endo-trig addition of a vinyl radical onto the first vinyl ether function or an initial 5-exo-trig addition, followed by rearrangement to the more stable anomeric radical intermediate. In this report