Rare‐Earth‐Metal‐Catalyzed Synthesis of Azaindolines and Naphthyridines via C−H Cyclization of Functionalized Pyridines
作者:Pengqing Ye、Yinlin Shao、Fangjun Zhang、Jinxuan Zou、Xuanzeng Ye、Jiuxi Chen
DOI:10.1002/adsc.201901473
日期:2020.2.21
We report herein a rare‐earth‐metal‐catalyzed insertion of a 2‐pyridine C(sp2)−H bond into an intramolecular unactivated vinyl bond. This reaction provides streamlined access to a range of azaindolines in moderate to excellent yields. The salient features of this reaction include simple and mild reaction conditions, 100% atom efficiency, and wide substrate scope. This methodology is also used to construct
我们在此报告了稀土金属催化的2吡啶C(sp 2)-H键插入分子内未活化的乙烯基键的过程。该反应以中等至优异的产率提供了对一系列氮杂二氢吲哚的流线型通道。该反应的显着特征包括简单温和的反应条件,100%的原子效率和广泛的底物范围。该方法还用于构建其他含氮化合物,例如萘啶衍生物。提出了一种可能的机制来形成氮杂二氢吲哚,涉及通过镧系元素络合物进行的初始C-H键活化,然后C = C插入Ln-C键以形成烷基镧系元素,然后进行环化。