Sodium metavanadate catalyzed direct hydroxylation of benzene to phenol with hydrogen peroxide in acetonitrile medium
作者： Min Jian , Liangfang Zhu , Jinyue Wang , Jin Zhang , Guiying Li
DOI: 10.1016/J.MOLCATA.2006.02.054
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摘要: Abstract The homogenous liquid-phase direct catalytic oxidation of benzene to phenol was performed at room temperature in acetonitrile solvent using sodium metavanadate as the catalyst and hydrogen peroxide oxidant. effects various reaction parameters, such acidity system, temperature, time amount used, were studied. Under optimized conditions, a yield 13.5% with selectivity 94% obtained. variation vanadium species during studied by situ 51V-NMR method. It found that existed VO2+ before reaction. In presence peroxide, might be transferred peroxovanadate species, HVO(O2)2, VO(O2)+, which oxidized exerting performance. A cycle involving above mechanism proposed.
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