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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 32, Number 7
BKCSDE 32(7)
July 20, 2011 

Preparation, Characterization and First Application of Alumina Supported Polyphosphoric Acid (PPA/Al2O3) as a Reusable Catalyst for the Synthesis of 14-Aryl-14H-dibenzo[a, j]xanthenes
Haniyeh Norouzi, Abolghasem Davoodnia, * Mehdi Bakavoli, Mohsen Zeinali-Dastmalbaf, Niloofar Tavakoli-Hoseini, Mahmoud Ebrahimi
Alumina supported polyphosphoric acid, 14-Aryl-14H-dibenzo[a, j]xanthenes, Heterogeneous catalysis, Solvent-free conditions
Alumina supported polyphosphoric acid (PPA/Al2O3) was successfully prepared by impregnation of alumina support by polyphosphoric acid and characterized using FT-IR spectroscopy, the N2 adsorption/desorption analysis (BET), thermal analysis (TG/DTG), and X-ray diffraction (XRD) techniques. The catalytic behavior of this new solid acid supported heterogeneous catalyst was checked in the synthesis of 14-aryl-14Hdibenzo[ a, j]xanthenes by cyclocondensation reaction of β-naphthol and aryl aldehydes under solvent-free conditions. The results showed that the novel catalyst has high activity and the desired products were obtained in very short reaction times with high yields. Moreover, the catalyst can be easily recovered by filtration and reused at least three times with only slight reduction in its catalytic activity.
2311 - 2315
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