One-Pot Synthesis of 14-Aryl-14 H-dibenzo[a,j]xanthene Derivatives Catalyzed by Nano-Alumina Sulfuric Acid Through Solvent-Free Conditions

An expeditious and environmentally friendly approach for the synthesis of 14-aryl-14 Hdibenzo[ a,j]xanthenes via the multicomponent condensation reaction between different aromatic aldehydes and β-naphthol catalyzed by Nano-alumina sulfuric acid (N-ASA) under thermal and solventfree conditions has been studied. Notably, the present method offers desirable advantages of high yields, simplicity of work-up procedure, easy purification, reduced reaction times and reusability of the catalyst. Characteristics of nano-alumina sulfuric acid were determined using X-Ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM) and FT-IR spectroscopy.