Toyao Takashi, Siddiki S M A Hakim, Touchy Abeda S, Onodera Wataru, Kon Kenichi, Morita Yoshitsugu, Kamachi Takashi, Yoshizawa Kazunari, Shimizu Ken-Ichi
Institute for Catalysis, Hokkaido University, N-21, W-10, Sapporo, 001-0021, Japan.
Elements Strategy Initiative for Catalysis and Batteries, Kyoto University, Katsura, Kyoto, 615-8520, Japan.
Chemistry. 2017 Jan 23;23(5):1001-1006. doi: 10.1002/chem.201604762. Epub 2016 Nov 22.
TiO -supported Re, Re/TiO , was found to promote selective hydrogenation of carboxylic acids having aromatic and aliphatic moieties to the corresponding alcohols. Re/TiO showed superior results compared to other transition-metal-loaded TiO and supported Re catalysts for selective hydrogenation of 3-phenylpropionic acid. 3-phenylpropanol was produced in 97 % yield under mild conditions (5 MPa H at 140 °C). Contrary to typical heterogeneous catalysts, Re/TiO does not lead to the formation of dearomatized byproducts. The catalyst is recyclable and shows a wide substrate scope in the synthesis of alcohols (22 examples; up to 97 % isolated yield).
负载于TiO₂上的铼（Re/TiO₂）被发现可促进具有芳香族和脂肪族部分的羧酸选择性氢化为相应的醇。与其他负载过渡金属的TiO₂和负载铼的催化剂相比，Re/TiO₂在3-苯基丙酸的选择性氢化反应中表现出更优异的结果。在温和条件下（140℃，5 MPa氢气），3-苯基丙醇的产率为97%。与典型的多相催化剂不同，Re/TiO₂不会导致脱芳构化副产物的形成。该催化剂可循环使用，并且在醇的合成中显示出广泛的底物范围（22个实例；分离产率高达97%）。
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