应用化学 ›› 2011, Vol. 28 ›› Issue (01): 118-120.DOI: 10.3724/SP.J.1095.2010.00216

• 研究简报 • 上一篇    下一篇

吡咯烷酮酸性离子液体中硼酸酯的催化合成

庄丽珍,张婷婷,王延伟,梁洪泽*   

  1. (宁波大学材料科学与化学工程学院 宁波  315211)
  • 收稿日期:2010-04-13 修回日期:2010-05-17 出版日期:2011-01-10 发布日期:2011-01-10
  • 通讯作者: 梁洪泽,教授; Tel:0574-87600784; Fax:0574-87609987; E-mail:lianghongze@nbu.edu.cn; 研究方向:有机合成及催化反应
  • 基金资助:
    浙江省大学生科技创新活动计划(新苗人才计划),宁波市科技局自然科学基金(2009A610047)资助项目

Synthesis of Boric Acid Ester Catalyzed by Pyrrolidonium Acidic Ionic Liquid

ZHUANG Lizhen, ZHANG Tingting, WANG Yanwei, LIANG Hongze*   

  1. (Faculty of Materials Science and Chemical Engineering,Ningbo University,Ningbo 315211)
  • Received:2010-04-13 Revised:2010-05-17 Published:2011-01-10 Online:2011-01-10

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4 h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。

关键词: 离子液体, 酯化反应, 硼酸酯, 绿色化学

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.

Key words: ionic liquid, esterification, boric acid ester, green chemistry

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