Metal-free catalyzed oxidative trimerization of indoles by using TEMPO in air: a biomimetic approach to 2-(1H-indol-3-yl)-2,3′-biindolin-3-ones
作者:Wen-Bing Qin、Qiong Chang、Yun-Hong Bao、Ning Wang、Zheng-Wang Chen、Liang-Xian Liu
DOI:10.1039/c2ob26390d
日期:——
simple, convenient and efficient metal-free catalyzed oxidative trimeric reaction of indoles toward a variety of 2-(1H-indol-3-yl)-2,3′-biindolin-3-one derivatives in moderate to excellent yields has been developed. This transformation proceeds via a tandem oxidative homocoupling reaction by using TEMPO in air as an environmentally benign oxidant. This methodology provides an alternativeapproach for the
Silver-catalyzed TEMPO oxidative homocoupling of indoles for the synthesis of 3,3′-biindolin-2-ones
作者:Feng Lin、Yu Chen、Baoshuang Wang、Wenbing Qin、Liangxian Liu
DOI:10.1039/c5ra04106f
日期:——
A silver-catalyzed TEMPO oxidative homo dimerization of indoles was first successful demonstrated. This new methodology is both atom and step efficient, allowing the synthesis of substituted C3–C3′ bisindolin-2-ones in moderate to excellent yields.