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Tetramethyl guanidinium chlorosulfonate as a highly efficient and recyclable organocatalyst for the preparation of bis(indolyl)methane derivatives

Paper ID Volume ID Publish Year Pages File Format Full-Text
50643 46806 2014 5 PDF Available
Title
Tetramethyl guanidinium chlorosulfonate as a highly efficient and recyclable organocatalyst for the preparation of bis(indolyl)methane derivatives
Abstract

•Tetramethylguanidine ionic liquid (TMG IL) is synthesized and characterized.•The TMG IL is an excellent organocatalyst for the synthesis of bisindolylmethanes.•The products are quantitatively obtained at environmentally benign conditions.•The TMG IL catalyst is recyclable without losing its catalytic activity.

The synthesis and characterization of a novel superbase ionic liquid, tetramethylguanidinium chlorosulfonate, are described. The guanidine ionic liquid (GIL) was characterized by FT-IR and NMR spectroscopies, and wide-angle X-ray scattering techniques, as well as thermogravimetric analysis. The GIL functions as an effective, environmentally benign, and recyclable catalyst for the synthesis of various bis(indolyl)methanes in outstanding yields (90–96%), within short reaction times; further, no chromatographic purification step for the product is required.

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Keywords
Bis(indolyl)methanes; Organocatalysis; Chlorosulfonic acid; Ionic liquid; Tetramethylguanidine
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Tetramethyl guanidinium chlorosulfonate as a highly efficient and recyclable organocatalyst for the preparation of bis(indolyl)methane derivatives
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 57, 5 December 2014, Pages 55–59
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
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Price was $35.95
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Price after discount Only $4.95
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Full-text PDF Download
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