| 负载型磺酸化席夫碱二-邻苯甲醛乙二胺(Salen)-Mn(Ⅲ)配合物催化不对称环氧化反应 |
| Enantio-Selective Epoxidation Catalyzed by Supported Sulphonato-Salen-Mn(Ⅲ) Complex in Ionic Liquid |
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| 摘要: 设计了负载型催化剂/离子液体体系：磺酸化席夫碱二-邻苯甲醛乙二胺(Salen)-Mn(Ⅲ)配合物中5, 5′-磺酸根通过氢键作用分别负载于硅胶和硅藻土，再分散于亲水性离子液体1-正丁基-3-甲基咪唑四氟硼酸盐(BMImBF4)或憎水性离子液体1-正丁基-3-甲基咪唑六氟磷酸盐(BMImPF6)中。研究了此催化体系对苯乙烯和α-甲基苯乙烯的不对称环氧化反应，结果表明此体系减少了催化剂的流失，催化体系可循环五次；扩大了手性诱导能力，对映体过量值(ee)可达100%； |
| 关键词: 离子液体 磺酸化 Salen-Mn(Ⅲ) 不对称环氧化 |
| 基金项目: |
| Abstract: A catalytic system was developed by the initial immobilization of sulphonato-Salen-Mn(Ⅲ) complex on two silica-supports through the linkage of hydrogen bonding anchored on the 5,5′-positions of 2,2′-Ethylenebis(nitrilomethylidene)bisphenol(salen) ring and the subsequent dispersion of supported catalysts into hydrophilic ionic liquid 1-Butyl-3-methylimidazolium tetrafluoroborate(BMImBF4) or hydrophobic ionic liquid 1-Butyl-3-methylimidazolium hexafluorophosphate(BMImPF6). The enantioselective epoxidation of styrene and α-methylstyrene is studied in this catalytic system and the experimental results indicate that the system can be circulated for five times and the catalyst leaching is minimized. Moreover, the system can increase chiral induction with an enantiomeric excess of 100%. The catalytic performance in BMImBF4 is better than that in BMImPF6. |
| Keywords: ionic liquid sulphonation salen-Mn(Ⅲ) enantioselective epoxidation |
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| 全文下载次数: 2019 |
| 徐国津,唐玉海,魏赛丽,孙 杨,傅 强.负载型磺酸化席夫碱二-邻苯甲醛乙二胺(Salen)-Mn(Ⅲ)配合物催化不对称环氧化反应[J].无机化学学报,2009,25(8):1359-1365. |
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