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Original Articles

Application of Natural Kaolin Supported Sulfuric Acid as an Ecofriendly Catalyst for the Efficient Synthesis of bis(indolyl)methanes

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Pages 905-908 | Received 24 Jun 2011, Accepted 16 Aug 2011, Published online: 06 Aug 2012
 

Abstract

The acidified kaolin with sulfuric acid (2% w/w) is introduced as a novel, mild, highly efficient, easily prepared, very cheap, recyclable and ecofriendly catalyst in organic synthesis. This catalyst has been used successfully for the synthesis of bis(indolyl)methanes via the condensation of indoles with aldehydes at room temperature. The simplicity, efficiency, mild reaction condition, high yield of product, easy work up procedure, and recyclability of the catalyst are the advantages of this procedure.

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