Ruthenium hydroxide on magnetite as a magnetically separable heterogeneous catalyst for liquid-phase oxidation and reduction
Ruthenium hydroxide on magnetite as a magnetically separable heterogeneous catalyst for liquid-phase oxidation and reduction
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DOI：
10.1039/b603204d
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发表时间：
2006-01-01
期刊：
影响因子：
9.8
通讯作者：
Mizuno, Noritaka
中科院分区：
文献类型：
--
作者：
Kotani, Miyuki;Koike, Takeshi;Mizuno, Noritaka
以Fe_3 O_4为载体的氢氧化钌催化剂（Ru（OH）（x）/Fe_3 O_4）可有效地促进醇的有氧氧化、胺的有氧氧化和以异丙醇为氢供体的羰基化合物还原成醇的反应。各种各样的底物，包括芳香族，脂肪族和杂环的，可以转化为所需的产品在高至优异的产率，没有任何添加剂，如碱和电子转移介质。反应后，催化剂/产物的分离可以很容易地实现与永磁体和超过99%的Ru（OH）（x）/Fe 3 O 4催化剂通常可以回收用于每个反应。这些反应的催化本质上是多相的，并且在这些反应之后回收的Ru（OH）（x）/Fe 3 O 4可以重复使用而没有明显的催化性能损失。
Three kinds of reactions, (i) aerobic oxidation of alcohols, (ii) aerobic oxidation of amines, and (iii) reduction of carbonyl compounds to alcohols using 2-propanol as a hydrogen donor, could efficiently be promoted by an easily prepared ruthenium hydroxide catalyst on magnetite (Ru(OH)(x)/Fe3O4). A wide variety of substrates including aromatic, aliphatic, and heterocyclic ones could be converted to the desired products in high to excellent yields without any additives such as bases and electron transfer mediators. After the reaction, the catalyst/product(s) separation could be easily achieved with a permanent magnet and more than 99% of Ru(OH)(x)/Fe3O4 catalyst could usually be recovered for each reaction. The catalysis for these reactions was intrinsically heterogeneous, and Ru(OH)(x)/Fe3O4 recovered after these reactions could be reused without appreciable loss of the catalytic performance.