Five-membered ring annulation via propargyl- and allylsilanes
作者:Rick L. Danheiser、Brian R. Dixon、Robert W. Gleason
DOI:10.1021/jo00049a006
日期:1992.11
Allyl- and propargylsilanes can serve as three-carbon components in a [3 + 2] annulation strategy for the synthesis of five-membered carbocycles and heterocycles.
Free radical addition to branched allylsilanes: stereoselective formation and elimination of β bromosilanes
作者:Ned A. Porter、Guiru Zhang、Aimee D. Reed
DOI:10.1016/s0040-4039(00)00902-3
日期:2000.7
Lewis acid-promoted free radicaladdition to 3-silyl-1-butenes occurs in good yield to give predominantly the cis-substituted alkene. The transfer reaction occurs by atom-transfer addition of the alkyl bromide precursor, an addition that occurs by Felkin–Anh control. Stereoselective anti elimination of the intermediate β-silylhalide gives the cis olefin.