A Copper-Mediated Oxidative Coupling Route to 3<i>H</i>- and 1<i>H</i>-Indoles from<i>N</i>-Aryl-enamines
作者:Pauline Drouhin、Richard J. K. Taylor
DOI:10.1002/ejoc.201500112
日期:2015.4
copper(II)-mediated C–H bond oxidation and C–C bond formation procedure has been applied to the synthesis of indole derivatives. Intramolecular oxidative coupling of 3,3-disubstituted enamines proceeded using a non-expensive and air-stable copper salt, Cu(2-ethylhexanoate)2, to afford the corresponding C-3 quaternary indolenine products in good to excellent yields. 1H-Indoles can be prepared in a similar
一种简便的铜(II)介导的 C-H 键氧化和 C-C 键形成程序已应用于吲哚衍生物的合成。3,3-二取代烯胺的分子内氧化偶联使用非昂贵且空气稳定的铜盐Cu(2-乙基己酸)2进行,以良好至极好的产率提供相应的C-3季假吲哚产物。1H-吲哚可以用类似的方式制备,但在这种情况下,已发现 Cu(OAc)2·H2O 是优选的氧化剂。