Concise Access to 1,2-Pyrrole-Annulated Benzazepines through a Brønsted Acid Catalyzed Redox-Neutral Domino Reaction
作者:Peng-Fei Wang、Ya-Ping Huang、Xiaoan Wen、Hongbin Sun、Qing-Long Xu
DOI:10.1002/ejoc.201501006
日期:2015.10
A Bronsted acid catalyzed redox-annulated cascade reaction between 2-arylpyrroles and 2-(pyrrolidin-1-yl)-, 2-(piperidin-1-yl), or 2-morpholinobenzaldehydes has been developed. This dehydration/1,5-hydride shift/cyclization sequence results in the construction of two new C(sp2)–C(sp3) bonds, providing structurally diverse 1,2-pyrrole-annulated benzazepines in yields of 25–65 %.
已开发出布朗斯台德酸催化的 2-芳基吡咯和 2-(吡咯烷-1-基)-、2-(哌啶-1-基) 或 2-吗啉代苯甲醛之间的氧化还原环化级联反应。这种脱水/1,5-氢化物转移/环化序列导致构建两个新的 C(sp2)–C(sp3) 键,以 25–65% 的产率提供结构多样化的 1,2-吡咯环化苯并氮杂。