| 席夫碱钼(Ⅵ)配合物催化合成环氧环己烷 |
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| 引用本文： | 孙士淇,移永杰,常玥,查飞.席夫碱钼(Ⅵ)配合物催化合成环氧环己烷[J].化学试剂,2017,39(9). |
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| 作者姓名： | 孙士淇 移永杰 常玥 查飞 |
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| 作者单位： | 1. 西北师范大学化学化工学院,甘肃兰州,730070;2. 西北师范大学化学化工学院,甘肃兰州 730070;西北师范大学生态环境相关高分子材料教育部重点实验室,甘肃兰州 730070 |
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| 基金项目： | 国家自然科学基金地区基金资助项目 |
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| 摘 要： | 以合成的水杨醛缩2-氨甲基吡啶席夫碱钼配合物(MoO_2(L_1)(EtOH)])、邻羟基苯乙酮缩2-氨甲基吡啶席夫碱钼配合物(MoO_2(L_2)(EtOH)])、2-吡啶甲醛缩邻氨基酚席夫碱钼配合物(MoO_2(L_3)(EtOH)])为催化剂,研究了叔丁基过氧化氢(TBHP)作氧化剂时3种配合物在制备环氧环己烷中的催化活性。3种席夫碱配合物中MoO_2(L_3)(EtOH)]的催化活性最高。详细考察了反应时间、温度、催化剂用量、氧化剂用量对环己烯转化率、环氧产物选择性的影响,筛选出了席夫碱钼催化剂最佳的反应条件:70℃,10 mgMoO_2(L_3)(EtOH)],n(环己烯)∶n(叔丁基过氧化氢)=1∶2,反应5 h,环己烯的转化率为77.2%,环氧环己烷选择性99%,产率为77.2%。催化剂重复使用性实验表明,该席夫碱配合物具有较高的稳定性。
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| 关 键 词： | 席夫碱 叔丁基过氧化氢 环氧环己烷 |
Catalytic Synthesis of Cyclohexene Oxide by Schiff-base Molybdenum (VⅥ) Complex |
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| SUN Shi-qi,YI Yong-jie,CHANG Yue,ZHA Fei.Catalytic Synthesis of Cyclohexene Oxide by Schiff-base Molybdenum (VⅥ) Complex[J].Chemical Reagents,2017,39(9). |
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| Authors: | SUN Shi-qi YI Yong-jie CHANG Yue ZHA Fei |
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| Abstract: | The catalytic activity of three Schiff-base molybdenum (Ⅵ) complexes was investigated using tert-butyl hydroperoxide as oxidizer to synthesize epoxy cyclohexane.The catalytic activity of 2-pyridinecarboxaldehyde o-aminophenol Schiff-base molybdenum (Ⅵ) complex is the highest in three Schiff-base complexes.The influence of reaction factors containing the reaction temperature,reaction time,catalyst dosage,cyclohexene and oxidant molar ratio on the conversion of cyclohexene and selectivity of epoxy cyclohexane is investigated.At 70 ℃,molar ratio of cyclohexene to tert-butyl hydroperoxide 1∶2,catalyst dosage 10 mg and reaction time 5 h,the conversion of cyclohexene is 77.2％ and the selectivity of epoxy cyclohexane is more than 99％.This catalyst reused test show that the Schiff base complex has high stability. |
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| Keywords: | Schiff-base tert-butyl hydroperoxide epoxy cyclohexane |
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