FeCl3 catalyzed intermolecular reaction between enol ethers and anilines: Access to 2,3-substituted indoles through aryl group migration
作者:Tapan Kumar Jena、Faiz Ahmed Khan
DOI:10.1016/j.tetlet.2020.152583
日期:2020.12
An intermolecular FeCl3 catalyzed reaction between anilines and enol ethers is described. A variety of enol ethers and aromatic amines undergo a CC bond formation followed by cyclization via CN bond formation to afford the 2,3-disubstituted indoles, involving an unexpected aryl group migration. In this methodology, anilines act as bis-nucleophiles, wherein the initial attack occurs at the α-position
描述了苯胺和烯醇醚之间的分子间FeCl 3催化反应。各种烯醇醚和芳族胺经历C C键形成,然后通过C N键形成环化,得到2,3-二取代的吲哚,这涉及意外的芳基迁移。在这种方法中,苯胺起双亲核试剂的作用,其中初始攻击发生在从苯胺邻位开始的烯醇醚的α位上,随后苯胺在β位上的胺部分随后发生反应,从而导致吲哚框架。该方法简单,消除了昂贵/危险过渡金属催化剂的使用,并提供了广泛的底物范围。