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 benzyl Claisen 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
走到野外:描述了一种新的酮亚胺盐的苄基克莱森级联重排。该反应在无金属条件下生成α-芳基化内酯(上图; Tf =三氟甲磺酰基)。进一步证明,通过反应设计(底部方案),可以将所涉及的阳离子中间体从周环反应歧管中转移到强大的离子转移中。