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Rapid and Efficient Synthesis of 3,3-Di(1H-indol-3-yl)indolin-2-ones and 2,2-Di(1H-indol-3-yl)-2H-acenaphthen-1-ones Catalyzed by p-TSA

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journal contribution
posted on 09.06.2014 by Jiangxia Yu, Tianhua Shen, Yan Lin, Yongbing Zhou, Qingbao Song

An efficient synthesis of 3,3-di(1H-indol-3-yl)indolin-2-ones and 2,2-di(1H-indol-3-yl)-2H-acenaphthen-1-ones via a reaction of various isatins or acenaphthenequinone with indoles in the presence of p-methylbenzene sulfonic acid (p-TSA) in CH2Cl2 at room temperature is described. The advantages of this method include good reaction yield, simple workup procedure, and mild reaction condition.

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