The reaction of indoles with various aldehydes to give corresponding bis(3-indolyl)phenylmethanes in aqueous
medium was catalyzed by 1-(benzenesulfonyl)-3-methyl-1H-imidazolium chlorides which were obtained by solvent-free
approach. Excellent yields within short duration were achieved after optimizing the reaction conditions. The thermal
properties of all 1-(benzenesulfonyl)-3-methyl-1H-imidazolium chlorides were studied using thermogravimetric analysis.
Keywords: Aldehydes, aqueous media, bis(3-indolyl)phenylmethanes, indoles, sulfonylimidazolium chlorides.
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