Sulfonated Organic Heteropolyacid Salts: Recyclable Green Solid Catalysts for the Highly Efficient and Green Synthesis of Bis(indolyl)methanes in Water

Author(s): Seyed M. Vahdat, Samad Khaksar, Saeed Baghery

Journal Name: Letters in Organic Chemistry

Volume 9 , Issue 2 , 2012

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In the present study, we introduce two nonconventional ionic liquids [MIMPS]3PW12O40 (a) and [TEAPS]3PW12O40 (b) as green solid acid catalysts for the efficient synthesis of bis(indolyl)methanes. The reaction of indole with aldehydes or ketones in water afforded the corresponding bis(indolyl)methanes in excellent yields. This reaction has been carried out in the presence of 1 mol% of catalysts at room temperature. The reusability of the catalysts was demonstrated by a six-run test. Additionally, the catalysts pose several advantages including mild reaction conditions, cleaner reactions and shorter reaction times.

Keywords: Bis(indolyl)methane, heteropolyacid salt, ionic liquid, green solid acid catalyst, water solvent, methanes, aldehydes, ketones, estrogen, agrochemicals

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Article Details

Year: 2012
Page: [138 - 144]
Pages: 7
DOI: 10.2174/157017812800221690
Price: $65

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