Chinese Journal of Catalysis ›› 2012, Vol. 33 ›› Issue (6): 962-969.DOI: 10.1016/S1872-2067(11)60387-2

• Research papers • Previous Articles     Next Articles

Highly Efficient and Environmentally Friendly Preparation of 14-Aryl-14H-dibenzo[a,j]xanthenes Catalyzed by Tungsto-divanado-phosphoric Acid

Reza TAYEBEE*, Shima TIZABI   

  1. Department of Chemistry, School of Sciences, Hakim Sabzevari University, Sabzevar 96179-76487, Iran
  • Received:2012-01-04 Revised:2012-02-17 Online:2012-05-30 Published:2012-05-30

Abstract: A rapid and efficient procedure for the preparation of various aryl-14H-dibenzo[a,j]xanthenes was reported. The method developed produced excellent yields via one-pot condensation of β-naphthol with various aryl-aldehydes in the presence of Keggin vanadium substituted heteropolyacid, H5PW10V2O40, as catalyst under solvent free conditions. The present methodology therefore offered several advantages but not limited to excellent yields (82%–98%), short reaction times (30–50 min), mild reaction conditions, simple work-up, as well as the utilization of cheap and environmentally benign catalyst in the absence of organic solvents.

Key words: xanthene, one-pot, condensation, aldehyde, β-naphthol, heteropolyacid, Keggin, solvent-free