PtCl4-catalyzed cyclization of N-acetyl-2-alkynylanilines: A mild and efficient synthesis of N-acetyl-2-substituted indoles
作者:Nattawadee Chaisan、Wilailak Kaewsri、Charnsak Thongsornkleeb、Jumreang Tummatorn、Somsak Ruchirawat
DOI:10.1016/j.tetlet.2018.01.014
日期:2018.2
An efficient synthesis of N-acetyl-2-substituted indole derivatives via direct intramolecular hydroamination of N-acetyl-2-alkynylaniline derivatives was developed. The reaction could be applied to a wide range of substrates employing only 1–2 mol% of PtCl4 as the catalyst to furnish the desired indole products in moderate to excellent yields. The current protocol is efficient, reliable and scalable
通过N-乙酰基-2-炔基苯胺衍生物的直接分子内加氢胺化反应,开发了一种N-乙酰基-2-取代的吲哚衍生物的有效合成方法。该反应可应用于仅使用1-2 mol%的PtCl 4作为催化剂的各种各样的底物,以中等至极好的收率提供所需的吲哚产物。当前的协议是有效,可靠和可扩展的,并且可以用作从容易获得的底物方便且快速地访问这一重要的N-杂环骨架类的重要工具。