Remarkable Effect of PEG-1000-based Dicationic Ionic Liquid for N-hydroxyphthalimide-catalyzed Aerobic Selective Oxidation of Alkylaromatics
Remarkable Effect of PEG-1000-based Dicationic Ionic Liquid for N-hydroxyphthalimide-catalyzed Aerobic Selective Oxidation of Alkylaromatics
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DOI：
10.5562/cca2051
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发表时间：
2012-10-01
影响因子：
0.3
通讯作者：
Liu, Zhongjie
中科院分区：
文献类型：
--
作者：
Lu, Tingting;Lu, Ming;Liu, Zhongjie
首次采用PEG 1000基功能性双阳离子酸性离子液体（PEG（1000）-DAIL）作为N-羟基邻苯二甲酰亚胺（NHPI）-乙酸钴（Co（OAc）（2））催化烷基芳烃有氧氧化合成相应酸的反应溶剂。在80 ℃下反应10 h，甲苯转化率可达99.9%，苯甲酸选择性可达99.5%，甲苯选择性氧化为苯甲酸。在温和条件下，几种烷基芳族化合物被有效地氧化成它们相应的酸。对于取代甲苯，底物转化率和产物选择性分别受取代基的位置和种类的影响。催化剂和PEG，000 DAIL都可以重复使用至少8次而不显着降低催化活性。(doi：10.5562/cca2051）
PEG 1000-based functional dicationic acidic ionic liquid (PEG(1000)-DAIL) was used for the first time as the reaction solvent for the N-Hydroxyphthalimide (NHPI)-cobalt acetate(Co(OAc)(2)) catalyzed aerobic oxidations of alkylaromatics to the corresponding acids. It enhanced the efficient catalytic ability of 99.9 % conversion of toluene with 99.5 % selectivity for benzoic acid could be obtained at 80 degrees C in 10 h and ethylbenzene was selectively oxidized to benzoic acid. Several alkylaromatics were efficiently oxidized to their corresponding acids under mild conditions. For substituted toluene, the conversions of substrates and the selectivity of products was affected by the position and kind of substituted groups, respectively. Both the catalyst and PEG,000 DAIL could be reused at least eight times without significantly decreasing the catalytic activity.(doi: 10.5562/cca2051)