离子液体中芳烃侧链分子氧催化氧化反应研究  

Catalytic Oxidation of Alkylbenzenes with Molecular Oxygen in Ionic Liquids

作　　者：刘耀华[1] 崔鹏[1] 孙靖[1] 杨帆[1] 汤杰[1] 

机构地区：[1]华东师范大学化学系

出　　处：《高等学校化学学报》2006年第12期2314-2318,共5页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:20172016);上海市科委基础研究重点项目(批准号:04JC14032);上海市科技启明星计划(批准号:01QA14017)资助.

摘　　要：分别以离子液体[Hex-mim]BF4，[Bmim]BF4，[Bmim]PF6和[Omim]BF4为溶剂，Co（Ⅱ），Mn（Ⅱ）或Ni（Ⅱ）／NHPI（AIBN）为复合催化剂，考察了不同离子液体-催化剂体系中常压分子氧氧化芳烃侧链烷基的反应．在[Hex-mim]BF4中，Co（Ⅱ）或Mn（Ⅱ）／NHPI可有效地催化芳烃侧链烷基的分子氧氧化．在优化条件下，乙苯、正丙苯和正丁苯分别以高达90％，94％和93％的收率得到相应的芳香酮；甲苯和对位取代甲苯以32％～47％的收率被氧化为相应的芳香酸．离子液体及金属催化剂体系在减压下除水后，可循环使用．Using ionic liquid [ Hex-mim] BF4, [ Bmim] BF4, [ Bmim] PF6, and [ Omim] BF4 as the solvent, respectively, the oxidation of alkylbenzenes by molecular oxygen was investigated under atmospheric pressure with Co（Ⅱ）, Mn（ Ⅱ ）, or Ni（ Ⅱ ）/NHPI （or AIBN） as the catalysts. The [ Hex-mim] BF4/Co^2＋ （or Mn^2＋ ）/NHPI system was demonstrated efficient for the oxidation of alkylbenzene. Under the optimized condition, ethylbenzene, n-propylbenzene, and n-butylbenzene were oxidized to the corresponding aromatic ketone with yields up to 90%, 94%, and 93%, respectively, toluene and p-substituted toluene were oridized to benzoic acid and the corresponding p-substituted benzoic acid with yields of 32%-47%. The ionic liquid and metal catalyst could be reused by removing water from them under a reduced pressure.

关 键 词：离子液体 催化氧化 分子氧 烷基苯 

分 类 号：O625.4[理学—有机化学] TQ243.1[理学—化学]