Steering Reaction Pathways: From Benzyl Claisen Rearrangements to Powerful Ionic Shifts
作者:Viviana Valerio、Claire Madelaine、Nuno Maulide
DOI:10.1002/chem.201003591
日期:2011.4.18
Take a walk on the wild side: A novel benzylClaisen cascade rearrangement of keteniminium salts is described. The reaction leads to α‐arylated lactones under metal‐free conditions (top scheme; Tf=trifluoromethanesulfonyl). It is further demonstrated that the cationic intermediates involved can be steered away from pericyclic reaction manifolds into powerful ionic shifts through reaction design (bottom