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S. A. Dake, M. B. Khedkar, G. S. Irmale, S. J. Ukalgaon- kar, V. V. Thorat, S. A. Shintre and R. P. Pawar, “Sulfated Tin Oxide: A Reusable and Highly Efficient Het- erogeneous Catalyst for the Synthesis of 2,4,5-Triaryl-1H-imida-zole Derivatives,” Synthetic Communi-cations, Vol. 42, No. 10, 2012, pp. 1509-1520. doi:10.1080/00397911.2010.541744

has been cited by the following article:

• TITLE: SO42-/SnO2-Catalyzed C3-alkylation of 4-hydroxycoumarin with secondary benzyl alcohols and O-alkylation with O-acetyl compounds

  AUTHORS: Venugopalarao Narayana, Ravi Varala, Pudukulathan Zubaidha

  KEYWORDS: C-C and C-O bond formations, Sulfated tin oxide (STO), reusability, 4-Hydroxy coumarin, secondary benzyl alcohol, secondary benzyl O-acetate

  JOURNAL NAME: International Journal of Organic Chemistry, Vol.2 No.3A, October 3, 2012

  ABSTRACT: Sulfated tin oxide (STO) has been found to be an efficient reusable solid superacid catalyst for C3-alkylation and O-alkylation of 4-hydroxycoumarins with benzylic, allylic alcohols/and corresponding acetates respectively, in acetic acid under reflux conditions with good yield of products.