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has been cited by the following article:

• TITLE: One-Pot Process of Anthraquinone Synthesis in the Presence of Mo-V-P Heteropoly Acid Solutions as a Bifunctional Catalysts

  AUTHORS: Leonid Gogin, Elena Zhizhina

  KEYWORDS: 9, 10-Anthraquinone; Mo-V-P Heteropoly Acids; Diene Synthesis; Organic Solvents

  JOURNAL NAME: Modern Research in Catalysis, Vol.2 No.3, June 27, 2013

  ABSTRACT: Acid-catalytic 1,3-butadiene condensation with para-quinones followed by the obtained product oxidation may be performed in one stage as one-pot process, if assisted by the aqueous solutions of Mo-V-P heteropoly acids with a composition of HaPzMoyVxOb. 1,4-naphthoquinone condensation with 1,3-butadiene in the HPA solutions with no organic solvents yields 9,10-anthraquinone (AQ) mixed with tetrahydro-AQ (THA) and dihydro-AQ (DHA). However, AQ yield and its purity may be considerably improved by using water-mixable organic solvents, e.g., acetone, 1,4-dioxane, as well as high vanadium content HPA such as H15P4Mo18V7O89 and H17P3Mo16V10O89. Process optimization provides 70% yield of reaction product containing no less than 90% AQ.