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A. Jha and J. Beal, “Convenient Synthesis of 12H- Benzo[a]xanthenes from 2-Tetralone,” Tetrahedron Letter, Vol. 45, No. 29, 2004, pp. 8999-9001.
http://dx.doi.org/10.1016/j.tetlet.2004.10.046

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.