Enantiospecific bromonium ion generation and intramolecular capture: a model system for asymmetric bromonium ion-induced polyene cyclisations
作者:D. Christopher Braddock、Jared S. Marklew、Alexander J. F. Thomas
DOI:10.1039/c1cc13619d
日期:——
Scalemic bromonium ions generated enantiospecifically by the action of catalytic triflic acid on scalemic regioisomeric bromohydrin derivatives are trapped intramolecularly, enantiospecifically and regioselectively to give bicyclic brominated carbocycles in excellent yield and high enantiomeric excess. This enantiospecific pathway is not significantly perturbed by the addition of a trisubstituted alkene
通过催化三氟甲基磺酸对规模性区域异构体溴代醇衍生物的作用而对映体特异性产生的规模性溴离子被分子内,对映体特异性和区域选择性地捕集,从而以优异的收率和高的对映体过量得到双环溴化碳环。通过添加三取代的烯烃,该对映体特异性途径不会受到显着干扰。