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。

IF 1.3 4区化学 Q3 CHEMISTRY, MULTIDISCIPLINARY

Turkish Journal of Chemistry 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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引用次数: 0

摘要

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

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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来源期刊

Turkish Journal of Chemistry 化学-工程：化工

CiteScore

2.40

自引率

7.10%

发文量

审稿时长

3 months

期刊介绍： The Turkish Journal of Chemistry is a bimonthly multidisciplinary journal published by the Scientific and Technological Research Council of Turkey (TÜBİTAK). The journal is dedicated to dissemination of knowledge in all disciplines of chemistry (organic, inorganic, physical, polymeric, technical, theoretical and analytical chemistry) as well as research at the interface with other sciences especially in chemical engineering where molecular aspects are key to the findings. The journal accepts English-language original manuscripts and contribution is open to researchers of all nationalities. The journal publishes refereed original papers, reviews, letters to editor and issues devoted to special fields. All manuscripts are peer-reviewed and electronic processing ensures accurate reproduction of text and data, plus publication times as short as possible.