Synthetic Studies in the Field of Fluorinated Cyclopropanes
作者:Fernanda Misani、Louise Speers、A. M. Lyon
DOI:10.1021/ja01593a041
日期:1956.6
1,3-γ-Silyl-elimination in electron-deficient cationic systems
作者:Michael A. Mercadante、Christopher B. Kelly、Trevor A. Hamlin、Kayla R. Delle Chiaie、Michael D. Drago、Katherine K. Duffy、Megan T. Dumas、Diana C. Fager、Bryanna L. C. Glod、Katherine E. Hansen、Cameron R. Hill、Rebecca M. Leising、Catherine L. Lynes、Allyson E. MacInnis、Madeline R. McGohey、Stephanie A. Murray、Marc C. Piquette、Shaina L. Roy、Ryan M. Smith、Katherine R. Sullivan、Bao H. Truong、Kristina M. Vailonis、Vitaliy Gorbatyuk、Nicholas E. Leadbeater、Leon J. Tilley
DOI:10.1039/c4sc01732c
日期:——
an electron-withdrawing trifluoromethyl group (–CF3) at a putative cationic centre enhances γ-silyl neighbouring-group participation (NGP). In stark contrast to previously studied γ-silyl-substituted systems, the preferred reaction pathway is 1,3-γ-silyl elimination, giving ring closure over solvent substitution or alkene formation. The scope of this cyclopropanation reaction is explored for numerous