【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.更多还原

【Abstract】 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.更多还原