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| 2,2,6,6-四甲基哌啶-1-氧自由基促进的钒基催化剂催化苯直接氧化制苯酚 | |
| 引用本文： | 陈佳琦,高爽,李军,吕迎. 2,2,6,6-四甲基哌啶-1-氧自由基促进的钒基催化剂催化苯直接氧化制苯酚[J]. 催化学报, 2011, 32(9): 1446-1451. DOI: 10.1016/S1872-2067(10)60254-9 |
| 作者姓名： | 陈佳琦 高爽 李军 吕迎 |
| 作者单位： | 中国科学院大连化学物理研究所,辽宁 大连 116023;中国科学院研究生院,北京 100049;中国科学院大连化学物理研究所,辽宁 大连,116023 |
| 基金项目： | 国家自然科学基金(20643006); 国家重点基础研究发展计划(973计划,2009CB623505)~~ |
| 摘 要： | 以钒基化合物为催化剂,在TEMPO(2,2,6,6-四甲基哌啶-1-氧自由基)存在下,能形成快速催化分子氧氧化苯制苯酚的催化体系.在反应过程中,由类似芬顿试剂反应过程生成的羟基自由基亲核进攻苯环,形成羟基环己二烯自由基；该羟基氢可在TEMPO存在的催化体系中消除,同时苯环氢可立即转移至氧原子而生成苯酚.在以[(CH3)... |
| 关 键 词： | 2 6 6-四甲基哌啶-1-氧自由基 钒 苯 羟基化 分子氧 苯酚 |
2,2,6,6-Tetramethylpiperidine-1-Oxyl-Promoted Hydroxylation of Benzene to Phenol over a Vanadium-Based Catalyst Using Molecular Oxygen |
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| CHEN Jiaqi,GAO Shuan,LI Jun,L Ying. 2,2,6,6-Tetramethylpiperidine-1-Oxyl-Promoted Hydroxylation of Benzene to Phenol over a Vanadium-Based Catalyst Using Molecular Oxygen[J]. Chinese Journal of Catalysis, 2011, 32(9): 1446-1451. DOI: 10.1016/S1872-2067(10)60254-9 | |
| Authors: | CHEN Jiaqi GAO Shuan LI Jun L Ying |
| Affiliation: | CHEN Jiaqi1,2,GAO Shuang1,*,LI Jun1,Lü Ying1 1Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,Liaoning,China 2GraduateUniversity of Chinese Academy of Sciences,Beijing 100049,China |
| Abstract: | Rapid benzene hydroxylation was achieved using a reaction system that consisted of a vanadium-based catalyst, ascorbic acid, and 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) with molecular oxygen as the oxidant. The hydroxyl radicals that form by a Fenton-type process attack the benzene ring to produce a hydroxycyclohexadienyl radical. The hydroxyl hydrogen is then abstracted quickly in the presence of TEMPO and phenol forms by the transfer of a hydrogen atom from the benzene ring to oxygen. Over the [(CH3)... |
| Keywords: | 2 6 6-tetramethylpiperidine-1-oxyl vanadium benzene hydroxylation phenol molecular oxygen |
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