University of Kashan Journal of Nanostructures 2251-7871 3 4 2013 12 01 Nano-TiCl4.SiO2: A Versatile and Efficient Catalyst for Synthesis of 14-aryl or alkyl-14H-dibenzo[a,j]xanthenes 461 466 5933 10.7508/jns.2013.04.011 EN B. F. Mirjalili Department of Chemistry, College of Science, Yazd University, Yazd, PO Box 89195-741, I. R. Iran. A. Bamoniri Deprtment of Organic Chemistry, Faculty of Chemistry, University of Kashan, Kashan, I. R. Iran. L. Zamani Department of Chemistry, College of Science, Yazd University, Yazd, PO Box 89195-741, I. R. Iran. Journal Article 2014 07 22 Nano-silica supported titanium tetrachloride (TiCl₄.SiO₂) was prepared and used as an acid catalyst for the 14-aryl or alkyl-14<em>H</em>-dibenzo[<em>a,,j</em>]xanthenesreaction under solvent-free conditions. Compared to the classical 14-aryl or alkyl-14<em>H</em>-dibenzo[<em>a,j</em>]xanthenesreaction conditions, this method consistently has the advantage of excellent yields, mild reaction conditions, ease of workup, survival of different functional groups and short reaction times. https://jns.kashanu.ac.ir/article_5933_37c3e909194a2994530a8dc1762880ec.pdf