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Catalysts 2017, 7(10), 300; doi:10.3390/catal7100300

PEG1000-Based Dicationic Acidic Ionic Liquid/Solvent-Free Conditions: An Efficient Catalytic System for the Synthesis of Bis(Indolyl)methanes

College of Biological and Chemical Engineering, Anhui Polytechnic University, Wuhu 241000, China
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Received: 18 September 2017 / Revised: 5 October 2017 / Accepted: 7 October 2017 / Published: 11 October 2017
(This article belongs to the Special Issue Organocatalysis in Ionic Liquids)
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Abstract

An efficient procedure has been researched for the solvent-free synthesis of bis(indolyl)methanes via a one-pot reaction of indoles and aldehydes or ketones promoted by PEG1000-based dicationic acidic ionic liquid (PEG1000-DAIL). The catalyst PEG1000-DAIL could be reused seven times with excellent results. Furthermore, through this method, a highly chemoselective reaction of benzaldehyde and acetophenone with indole could be achieved. View Full-Text
Keywords: bis(indolyl)methanes; ionic liquids; solvent-free conditions bis(indolyl)methanes; ionic liquids; solvent-free conditions
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Ren, Y.-M.; Xu, M.-D.; Wang, X. PEG1000-Based Dicationic Acidic Ionic Liquid/Solvent-Free Conditions: An Efficient Catalytic System for the Synthesis of Bis(Indolyl)methanes. Catalysts 2017, 7, 300.

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