Copper-catalyzed oxidative trimerization of indoles by using TEMPO to construct quaternary carbon centers: the synthesis of 2-(1H-indol-3-yl)-2,3′-biindolin-3-ones
Metal-Free–Catalyzed Oxidative Trimerization of Indoles Using NaNO<sub>2</sub> to Construct Quaternary Carbon Centers: Synthesis of 2-(1<i>H</i>-Indol-3-yl)-2,3′-biindolin-3-ones
作者:Jun Xue、Yunhong Bao、Wenbing Qin、Jiayi Zhu、Yubo Kong、Hongen Qu、Zhengwang Chen、Liangxian Liu
DOI:10.1080/00397911.2014.891743
日期:2014.8.3
convenient, and efficientsynthesis of 2-(1H-indol-3-yl)-2,3′-biindolin-3-one derivatives via a transition-metal-free-catalyzed oxidative trimeric reaction of indoles has been developed. This transformation may have occurred through a tandem oxidative homocoupling reaction by using NaNO2 in pyridine as oxidant. This methodology provides an alternative approach for the directgeneration of all-carbon