Synthesis of 3-methyl-3-buten-1-ol by supercritical CO2 in coordination with HZSM-5-catalyzed formaldehyde-isobutene Prins reaction.

IF 16.4 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2024-06-26 eCollection Date: 2024-01-01 DOI:10.55730/1300-0527.3682
Hang Yuan, Gui-Ping Cao, Hui Lv
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Abstract

The reaction solvent and catalyst play essential roles in the Prins reaction for the synthesis of 3-methyl-3-buten-1-ol (MBO) from formaldehyde and isobutene. The reactivity of the solid base-catalyzed Prins condensation reaction by formaldehyde and isobutene in supercritical CO2 was investigated using CsH2PO4-modified HZSM-5. We found that the alkaline sites of the alkali-loaded catalyst could extract the α-H on isobutene to generate olefin carbon-negative ions, while the supercritical CO2 with weak Lewis acidity could activate formaldehyde to carbon-positive ions, which can combine more easily with carbon-negative isobutene to react, thus improving the reactivity of the reaction system.

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利用超临界二氧化碳与 HZSM-5 催化的甲醛-异丁烯 Prins 反应合成 3-甲基-3-丁烯-1-醇。
在以甲醛和异丁烯为原料合成 3-甲基-3-丁烯-1-醇(MBO)的普林斯反应中,反应溶剂和催化剂起着至关重要的作用。我们使用 CsH2PO4 改性 HZSM-5 研究了甲醛和异丁烯在超临界 CO2 中固体碱催化 Prins 缩合反应的反应活性。我们发现,碱负载催化剂的碱性位点可以萃取异丁烯上的α-H,生成烯烃碳负离子,而具有弱路易斯酸性的超临界二氧化碳可以将甲醛活化为碳正离子,碳正离子更容易与碳负离子异丁烯结合反应,从而提高反应体系的反应活性。
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来源期刊
Accounts of Chemical Research
Accounts of Chemical Research 化学-化学综合
CiteScore
31.40
自引率
1.10%
发文量
312
审稿时长
2 months
期刊介绍: Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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