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F. Shirini, M. Abedini and R. Pourhasan, “N-Sulfonic Acid Poly(4-Vinylpyridinium) Chloride: A Novel Polymeric and Reusable Catalyst for the Preparation of Xan- thenes Derivatives,” Dyes and Pigments, Vol. 99 No. 1, 2013, pp. 250-255.
http://dx.doi.org/10.1016/j.dyepig.2013.04.036

has been cited by the following article:

• TITLE: A Green Protocol for Efficient Synthesis of 1,8-Dioxo-Octahydroxanthenes Using Ionic Liquid

  AUTHORS: Sangita Makone, Shreyas Mahurkar

  KEYWORDS: 1, 8-Dioxo-Octahydroxanthenes; Ionic Liquid; Aldehydes; Dimedone

  JOURNAL NAME: Green and Sustainable Chemistry, Vol.3 No.4A, November 29, 2013

  ABSTRACT: A clean, simple, efficient synthesis of 1,8-dioxo-octahydroxanthenes derivatives using ionic liquid 1-butyl, 3-me- thylimidazolium perchlorate ([bmim] ClO4) has been developed. The method provides several advantages such as simple work up, environmental friendliness and excellent yields in short reaction time. The ionic liquid [bmim] ClO4 used was recovered and reused for three times.