Poly(4-vinylpyridinium)hydrogen sulfate: A novel and efficient catalyst for the synthesis of 14-aryl-14H-dibenzo[a,j]xanthenes under conventional heating and ultrasound irradiation

A simple and convenient procedure for the synthesis of 14-aryl-14H-dibenzo[a,j]xanthenes is described through a one-pot condensation of 2-naphthol with aryl aldehydes in the presence of poly(4-vinylpyridinium)hydrogen sulfate as an efficient, cheap, readily synthesized and eco-friendly catalyst in a solvent free media using conventional heating and ultrasound irradiation.

Graphical abstractA simple and convenient procedure for the synthesis of 14-aryl-14H-dibenzo[a,j]xanthenes is described through a one-pot condensation of 2-naphthol with aryl aldehydes in the presence of poly(4-vinylpyridinium)hydrogen sulfate as an efficient, cheap, readily synthesized and eco-friendly catalyst in a solvent free media using conventional heating and ultrasound irradiation.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Introducing a new and novel catalyst for organic synthesis. ► Superiority of the catalyst with respect to the reported catalysts. ► Comparing two methods of one-pot synthesis of 14-aryl-14H-dibenzo[a,j]xanthenes. ► Generality of ultrasound irradiation method, high yields and very short reaction times. ► Application of ultrasound irradiation in the reaction.