Tungstic Acid: A Simple and Effective Solid Catalyst in Terpene Alcohol Oxidation Reactions with Hydrogen Peroxide

IF 2.1 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Surveys from Asia Pub Date : 2023-01-10 DOI:10.1007/s10563-023-09387-x

Márcio José da Silva, Pedro Henrique da Silva Andrade

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引用次数: 1

Abstract

In this work, we report for the first time, the tungstic acid-catalyzed oxidation of terpene alcohols with hydrogen peroxide. This simple, solid, and commercially available catalyst efficiently promoted the conversion of borneol, geraniol and nerol to camphor and epoxide products, respectively. Effects of main reaction parameters, such as catalyst load, the molar ratio of oxidant to the substrate, time, and reaction temperature were investigated. Conversions and selectivity greater than 90% were achieved using 1.0 mol % of H₂WO₄ after 2 h of reaction at 90 °C. The activation energy was equal to 66 kJmol⁻¹. We propose a reaction mechanism based on the experimental results. This solid catalyst was easily recovered and reused without loss of activity. As far as we know, it is the first time that tungstic acid was used as the catalyst in the oxidation reactions of terpene alcohols.

Graphical Abstract

Abstract Image

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钨酸:萜烯醇与双氧水氧化反应中一种简单有效的固体催化剂

本文首次报道了钨酸催化过氧化氢氧化萜烯醇的反应。这种简单、固体、可商品化的催化剂有效地促进了冰片、香叶醇和橙醇分别转化为樟脑和环氧化物产品。考察了催化剂用量、氧化剂与底物的摩尔比、反应时间和反应温度等主要反应参数对反应的影响。在90℃条件下，用1.0 mol %的H2WO4反应2 h，转化率和选择性均大于90%。活化能为66 kJmol−1。根据实验结果提出了反应机理。该固体催化剂易于回收和重复使用而不损失活性。据我们所知，钨酸在萜烯醇氧化反应中作催化剂尚属首次。图形抽象

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来源期刊

Catalysis Surveys from Asia 化学-物理化学

CiteScore

4.80

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Early dissemination of important findings from Asia which may lead to new concepts in catalyst design is the main aim of this journal. Rapid, invited, short reviews and perspectives from academia and industry will constitute the major part of Catalysis Surveys from Asia . Surveys of recent progress and activities in catalytic science and technology and related areas in Asia will be covered regularly as well. We would appreciate critical comments from colleagues throughout the world about articles in Catalysis Surveys from Asia . If requested and thought appropriate, the comments will be included in the journal. We will be very happy if this journal stimulates global communication between scientists and engineers in the world of catalysis.