作者:Jian Liu、Deb Kumar Das、Guoxiang Zhang、Shuang Yang、Hao Zhang、Xinqiang Fang
DOI:10.1021/acs.orglett.7b03358
日期:2018.1.5
The umpolung of β,γ-unsaturated diketones through N-heterocyclic carbene catalysis is described, which allows access to a variety of highly functionalized bicyclic cyclohexene-β-lactones and 1,3,4-triaryl benzenes. An unprecedented reaction pattern involving the catalytic formation of nucleophilic O-acylated homoenolate intermediate is proposed. A diverse set of transformations on the product further
描述了通过N-杂环卡宾催化的β,γ-不饱和二酮的溶剂化反应,它允许使用各种高度官能化的双环环己烯-β-内酯和1,3,4-三芳基苯。提出了涉及催化形成亲核O-酰化均烯酸酯中间体的前所未有的反应模式。产品上的各种转化进一步显示了该方案的合成潜力。