The reaction of 2-phenyl- and 1-methyl-2-phenylindole with nitrogen dioxide or with nitrousacid (NaNO2-CH3COOH) in benzene leads mainly to the formation of the isonitroso and 3-nitroso indole derivatives, respectively. When reacted with nitrousacid, 1-methyl-2-phenylindole gives also the corresponding azo-bis-indole in good yields. The reaction of indole with nitrogen dioxide leads to 2-(indol-3-yl)-3H-indol-3-one
Schmitz-Dumont et al., Justus Liebigs Annalen der Chemie, 1933, vol. 504, p. 1,14
作者:Schmitz-Dumont et al.
DOI:——
日期:——
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