Highly Active Au(I) Catalyst for the Intramolecular <i>e</i><i>xo</i>-Hydrofunctionalization of Allenes with Carbon, Nitrogen, and Oxygen Nucleophiles
作者:Zhibin Zhang、Cong Liu、Robert E. Kinder、Xiaoqing Han、Hua Qian、Ross A. Widenhoefer
DOI:10.1021/ja062045r
日期:2006.7.19
Au-catalyzed intramolecular hydroalkoxylation within minutes at room temperature to form the corresponding oxygen heterocycles in good yield with high exo-selectivity. 2-Allenyl indoles underwent Au-catalyzed intramolecular hydroarylation within minutes at room temperature to form 4-vinyl tetrahydrocarbazoles in good yield. Au-catalyzed cyclization of N-allenyl carbamates, allenyl alcohols, and 2-allenyl
(2,2-二苯基-4,5-己二烯基)氨基甲酸苄酯 (4) 与 Au[P(t-Bu)2(o-biphenyl)]Cl (2) 和 AgOTf 的 1:1 催化混合物反应5 mol%) 在二恶烷中在 25 摄氏度下 45 分钟导致 4,4-二苯基-2-乙烯基吡咯烷-1-羧酸苄酯 (5) 的分离,产率为 95%。Au(I) 催化的 N-烯丙氨基甲酸酯的分子内加氢胺化耐受烷基和烯基碳原子处的取代,并且对于哌啶衍生物的形成是有效的。γ-羟基和δ-羟基丙二烯也在室温下几分钟内经历了金催化的分子内加氢烷氧基化,以高产率和高外选择性形成相应的氧杂环。2-烯基吲哚在室温下几分钟内经历金催化的分子内加氢芳基化,以良好的产率形成4-乙烯基四氢咔唑。