ArticleCondensation of 2-naphtol with arylaldehydes using acetic acid functionalized ionic liquids as highly efficient and reusable catalysts

Add time:09/24/2019    Source:sciencedirect.com

An efficient solvent-free protocol for the synthesis of 14-aryl-14H-dibenzo[a,j]xanthenes from the condensation of 2-naphthol with arylaldehydes, using acetic acid functionalized imidazolium salts (1-carboxymethyl-3-methylimidazolium bromide ([cmmim]Br) and 1-carboxymethy1-3-methylimidazolium tetrafluoroborate ([cmmim]BF4) as reusable catalysts, has been developed. The turn over frequency on the catalysts is several times higher than the other previously reported catalysts. Also, thermal gravimetric analysis and powder X-ray diffraction pattern of the catalysts have been studied.

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