| Synthesis of 2,4-diisopropyl-5,5-dimethyl-1,3-dioxane catalyzed by Br?nsted acidic ionic liquids |
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| 作者单位： | 1 Shanghai Key Laboratory of Green Chemistry and Chemical Process, Department of Chemistry, East China Normal University, Shanghai 200062, China;
2 Energy Institue, Department of Materials Science and Engineering, Pennsylvania State University, PA 16802, USA;
3 College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024，China |
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| 基金项目： | Supported by the National Key Technology R&D Program of China (Grant No. 2006BAE03B06) and Shanghai Leading Academic Discipline Project (Grant No. B409) |
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| 摘 要： | The acetalization reactions of isobutyraldehyde with 2,2,4-trimethyl-1,3-pentanediol （TMPD） for the synthesis of 2,4-diisopropyl-5,5-dimethyl-1,3-dioxsne were carried out under mild reaction conditions using four water-stable Brenstad-acidic task-specific ionic liquids （HMIM]BF4, -SO3H funcUonalized acidic ionic liquid, -COOH functionalized acidic ionic liquid, NMP]HSO4]） as environmentally benign catalysts for the first time. The process is highly effective and very selective. The -COOH functionalized Brensted acidic ionic liquid with the two acid sites （IL-3） exhibited the most excellent catalytic performance under mild reactlon conditions. The -COOH functionalized Brensted acidic ionic liquid could be conveniently separated from the product and easily recycled in subsequent runs.
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| 关 键 词： | 酸性离子性液体 2 4-二异丙基-5 5-二甲基-1 3-二恶烷 异丁基醛 合成 |
| 收稿时间： | 2007-09-23 |
| 修稿时间： | 2008-03-08 |
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