One-Pot Process of Naphthoquinones Synthesis from Hydroquinone in the Presence of Solutions of Mo-V-P Heteropolyacids as Bifunctional Catalysts

• 作者: Elena G. Zhizhina Leonid L. Gogin Zinaida P. Pai
• 来源期刊: 催化剂现代研究(英文)
• 学科: 化学
• 关键词: HYDROQUINONE NAPHTHOQUINONES HETEROPOLYACID DIENE SYNTHESIS
• 年，卷（期）: 2019,（1）
• 页码范围: 1-9
• 页数: 9页
• 分类号: O6

摘要

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.