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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
Author to whom correspondence should be addressed.
Catalysts 2017, 7(10), 300;
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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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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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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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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