TITLE:
One-Pot Process of Naphthoquinones Synthesis from Hydroquinone in the Presence of Solutions of Mo-V-P Heteropolyacids as Bifunctional Catalysts
AUTHORS:
Leonid L. Gogin, Elena G. Zhizhina, Zinaida P. Pai
KEYWORDS:
Hydroquinone, Naphthoquinones, Heteropolyacid, Diene Synthesis
JOURNAL NAME:
Modern Research in Catalysis,
Vol.8 No.1,
January
31,
2019
ABSTRACT: 1,4-Naphthoquinones (NQ) is a class of organic compounds with a number of
important properties. However, the existing methods of their synthesis either give a low NQ
yield or multistage and require a lot of time. In the present work new one-pot process of NQ synthesis from hydroquinone (HQ)
and substituted 1,3-dienes at room temperature is proposed. The solution of
heteropolyacid H7PMo8V4O40 (HPA-4) is
used as a bifunctional (acid and redox) catalyst for this process. The influence of
a number of factors on key process parameters has been studied. It is
demonstrated that unsubstituted and a number of alkyl substituted
NQ with the yields of 50% - 80% and purity of 92% - 99% can be obtained by this method. The results obtained allow to
significantly simplify the synthesis of NQ directly from HQ in comparison with
the described similar methods.