Enabling the Synthesis of Perfluoroalkyl Bicyclobutanes <i>via</i> 1,3 γ-Silyl Elimination
作者:Christopher B. Kelly、Allison M. Colthart、Brad D. Constant、Sean R. Corning、Lily N. E. Dubois、Jacqueline T. Genovese、Julie L. Radziewicz、Ellen M. Sletten、Katherine R. Whitaker、Leon J. Tilley
DOI:10.1021/ol200121f
日期:2011.4.1
Two new bicyclobutanes were prepared from cyclobutyl systems by a novel, solvolytic, carbocation-based methodology. An electron-withdrawing perfluoroalkyl group at the incipient cationic center enhances neighboring-group participation of the γ-silyl group, inducing facile, remarkably selective 1,3-elimination yielding only bicyclobutanes. The method unlocks potential access to a host of EWG-substituted