TITLE:
One-Pot Production of Substituted Anthraquinones via the Diene Synthesis in the Presence of Mo-V-P Heteropoly Acid Solutions
AUTHORS:
Leonid Gogin, Elena Zhizhina
KEYWORDS:
Substituted 9, 10-Anthraquinones; Diene Synthesis; Mo-V-P Heteropoly Acids; Bifunctional Catalysts
JOURNAL NAME:
Modern Research in Catalysis,
Vol.3 No.2,
April
17,
2014
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 (NQ) condensation with
1,3-butadiene in HPA solutions (brutto-composition
H15P4Mo18V7O89 and H17P3Mo16V10O89) in the presence of hydrophylic organic solvents (acetone, 1,4-dioxane) provides
70% yield of 9,10-anthraquinone (AQ) containing no less than 90% AQ. In the
same conditions reaction NQ with substituted 1,3-butadienes in the presence of
the aqueous H17P3Mo16V10O89 (HPA-10) solution allows to prepare substituted AQ with yield up to 90% and
purity up to 99%. The catalysts are regenerated by oxygen in separate stage and
are reused.