Gold catalyzed oxidation of aldehydes in liquid phase
Gold catalyzed oxidation of aldehydes in liquid phase
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DOI：
10.1016/s1381-1169(02)00618-0
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发表时间：
2003-04-18
影响因子：
--
通讯作者：
Rossi, M
中科院分区：
文献类型：
--
作者：
Biella, S;Prati, L;Rossi, M
碳上的金在温和条件下将醛在水溶液中氧化成羧酸，而在回收时不会失去活性，而碳上的铂则不会发生这种情况。难溶性醛也可以被氧化，但反应速度较慢。在CCl4等有机溶剂中进行的实验表明，在这种溶剂中，Au/C和Pt/C都是可回收的，反应速度加快。另一种探索的可能性是在没有溶剂的情况下进行反应。然而，对于像对羟基和邻oh - phcho这样的固体醛，水溶剂是唯一的选择。(C) 2002 Elsevier Science B.V.版权所有
Gold on carbon oxidizes aldehydes to carboxylic acids in water solution under mild conditions without loss of activity on recycling, as does not occur for platinum on carbon. Also scarcely soluble aldehydes can be oxidized but the reaction rate is slower. Experiments carried out in an organic solvent such as CCl4 show a speed up of the reaction, in this solvent being recyclable both Au/C and Pt/C. Another explored possibility was represented by carrying out the reaction in the absence of solvent. However, for solid aldehydes like p- and o-OH-PhCHO the water solvent represent the unique alternative. (C) 2002 Elsevier Science B.V. All rights reserved.