Vanadium-catalyzed green oxidation of benzylic alcohols in water under air atmosphere
作者:Kuniaki Marui、Yuuki Higashiura、Shintaro Kodama、Suguru Hashidate、Akihiro Nomoto、Shigenobu Yano、Michio Ueshima、Akiya Ogawa
DOI:10.1016/j.tet.2014.02.032
日期:2014.4
oxidations of alcohols with O2 using water as the solvent are still rare, and precious metals, high-pressure O2 or air, and a stoichiometric amount of base are often required. In this study, it was found that an oxovanadium-4,4′-t-Bubpy (4,4′-di-tert-butyl-2,2′-bipyridyl) complex exhibited high catalytic activity in the oxidation of benzhydrols under an atmosphere of O2 in water as the sole solvent. Interestingly
从绿色化学原理的观点来看,使用催化量的金属络合物氧化醇是非常有吸引力的。然而,使用水作为溶剂用O 2进行的金属络合物催化的醇与醇的氧化的例子仍然很少,并且经常需要贵金属,高压O 2或空气以及化学计量的碱。在这项研究中,发现氧杂钒-4,4' - t - Bubpy(4,4'-二叔丁基-2,2'-联吡啶)配合物在苯甲酸下的苯酚氧化过程中表现出高催化活性。 O 2的气氛在水中作为唯一溶剂。有趣的是,这种催化氧化方法可以应用于大气中水中的克级需氧氧化。