Mechanism of the hydrogenolysis of ethers over silica-supported rhodium catalyst modified with rhenium oxide
Mechanism of the hydrogenolysis of ethers over silica-supported rhodium catalyst modified with rhenium oxide
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DOI：
10.1016/j.jcat.2011.03.018
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发表时间：
2011-06-13
影响因子：
7.3
通讯作者：
Tomishige, Keiichi
中科院分区：
文献类型：
--
作者：
Koso, Shuichi;Nakagawa, Yoshinao;Tomishige, Keiichi
Rh-ReOx/SiO2 (Re/Rh = 0.5) 在带有 OH 基团的醚的氢解中表现出高活性。与-CH2OH基团相邻的C-O键被选择性解离：四氢-5-甲基-2-糠醇和2-异丙氧基乙醇的氢解分别产生1,5-己二醇和乙醇+异丙醇。这种趋势表明通过氢化物攻击和随后阴离子质子化形成的阴离子中间体的区域选择性C-O解离机制。 (C) 2011 Elsevier Inc. 保留所有权利。
The Rh-ReOx/SiO2 (Re/Rh = 0.5) exhibited high activity in the hydrogenolysis of ethers with an OH group. The C-O bond neighboring -CH2OH group was selectively dissociated: The hydrogenolysis of tetrahydro-5-methyl-2-furfuryl alcohol and 2-isopropoxyethannol gave 1,5-hexanediol and ethanol + isopropanol, respectively. This tendency suggests the regioselective C-O dissociation mechanism via anion intermediate formed by the attack of hydride and the subsequent protonation of the anion. (C) 2011 Elsevier Inc. All rights reserved.