引用本文:
庄丽珍, 张婷婷, 王延伟, 梁洪泽. 吡咯烷酮酸性离子液体中硼酸酯的催化合成[J]. 应用化学,
2011, 28(1): 118-120.
doi:
10.3724/SP.J.1095.2011.00216
Citation: ZHUANG Lizhen, ZHANG Tingting, WANG Yanwei, LIANG Hongze. Synthesis of Boric Acid Ester Catalyzed by Pyrrolidonium Acidic Ionic Liquid[J]. Chinese Journal of Applied Chemistry, 2011, 28(1): 118-120. doi: 10.3724/SP.J.1095.2011.00216
Citation: ZHUANG Lizhen, ZHANG Tingting, WANG Yanwei, LIANG Hongze. Synthesis of Boric Acid Ester Catalyzed by Pyrrolidonium Acidic Ionic Liquid[J]. Chinese Journal of Applied Chemistry, 2011, 28(1): 118-120. doi: 10.3724/SP.J.1095.2011.00216
吡咯烷酮酸性离子液体中硼酸酯的催化合成
摘要:
研究了硼酸与频哪醇和环己醇在离子液体1-甲基-2-吡咯烷酮硫酸氢盐([Hnmp]HSO4)、1-丁基-3-甲基咪唑四氟硼酸盐([Bmim]BF4)及1-丁基-3-甲基咪唑六氟磷酸盐([Bmim]PF6)中生成2-环己氧基-4,4,5,5-四甲基-1,3,2-二氧硼烷的酯化反应。考察了不同离子液体、反应温度、反应时间和离子液体与反应物物质的量比等对反应的影响。结果表明,当n(硼酸):n(频哪醇):n(环己醇):n([Hnmp]HSO4)=1:1:1:1,反应温度为70℃和反应时间为4h时,硼酸酯的产率为72.5%,离子液体重复使用4次,催化活性无明显降低。
English
Synthesis of Boric Acid Ester Catalyzed by Pyrrolidonium Acidic Ionic Liquid
Abstract:
Esterification reaction of boric acid, pinacol and cyclohexanol has been studied in ionic liquids (IL), including 1-methyl-2-pyrrolidonium hydrogen sulfate([Hnmp]HSO4), 1-butyl-3-methylimidazolium tetrafluoroborate([Bmim]BF4) and 1-butyl-3-methylimidazolium hexafluorophosphate([Bmim]PF6). The influences of the types of ionic liquids, reaction temperature, reaction time and molar ratio of reactants to IL on the yields of 2-cyclohexyloxy-4,4,5,5-tetramethyl-[1,3,2]dioxaborolan have been investigated. The results showed that under the optimized conditions[n (boric acid):n (pinacol):n (cyclohexanol):n([Hnmp]HSO4)=1:1:1:1, 70℃ and 4 h], the yield of 2-cyclohexyloxy-4,4,5,5-tetramethyl-[1,3,2] dioxaborolan could reach up to 72.5%. The ionic liquid can be used repeatedly for four times without remarkable loss of the catalytic activity.
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Key words:
- ionic liquid
- / esterification
- / boric acid ester
- / green chemistry
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