Heteropolyacid: An efficient and eco-friendly catalyst for the synthesis of 14-aryl-14H-dibenzo[a,j]xanthene

A simple and efficient catalytic procedure for the synthesis of 14-aryl-14H-dibenzo[a,j]xanthene is reported. Tungsten heteropoly acid catalysts are used both in bulk or supported on silica gel under solvent-free conditions at 100 °C. Good yields and short reaction time are advantages of this new method.