Cleavage of ethers in an ionic liquid. Enhancement, selectivity and potential application
作者:William E. S. Hart、Leigh Aldous、Jason B. Harper
DOI:10.1039/c7ob01096f
日期:——
ionic liquid containing hydrogen bromide. Reactions that did not proceed in either water or DMSO were found to proceed readily in this system, with notable selectivity between the cleavage of the different ether types examined herein. Increasing the proportion of water in the reaction mixture dramatically decreased the rate constant of ether cleavage; this could, in part, be attributed to a decrease in
Multiple Mechanisms Mapped in Aryl Alkyl Ether Cleavage via Aqueous Electrocatalytic Hydrogenation over Skeletal Nickel
作者:Yuting Zhou、Grace E. Klinger、Eric L. Hegg、Christopher M. Saffron、James E. Jackson
DOI:10.1021/jacs.0c00199
日期:2020.2.26
We present here detailed mechanistic studies of electrocatalytic hydrogenation (ECH) in aqueous solution over skeletal nickel cathodes to probe the various paths of reductive catalytic C-O bond cleavage among functionalized aryl ethers relevant to energy science. Heterogeneous catalytic hydrogenolysis of aryl ethers is important both in hydrodeoxygenation of fossil fuels and in upgrading of lignin
我们在此详细介绍了骨架镍阴极上水溶液中电催化加氢 (ECH) 的机理研究,以探索与能源科学相关的官能化芳基醚之间还原催化 CO 键裂解的各种途径。芳基醚的多相催化氢解在化石燃料的加氢脱氧和生物质木质素的升级中都很重要。已知简单官能团(如羰基、羟基、甲基或甲氧基)的存在或不存在会导致 sp3 CO 和 sp2 CO 键之间的反应性和裂解选择性发生显着变化。具体而言,已报道的 Ni 和其他催化剂的氢解研究暗示了木质素的 α-酮和 α-羟基 β-O-4 型芳基醚键中 CO 醚键的不同裂解机制。我们的新费率,ECH 反应的选择性和同位素标记结果证实这些芳基醚通过不同的路径进行 CO 裂解。对于简单的 2-苯氧基-1-苯基乙烷或其醇同系物 2-苯氧基-1-苯基乙醇,苄基位点通过 Ni CH 插入激活,然后β 消除苯氧基离去基团。但是在酮的情况下,2-苯氧基苯乙酮,极化的羰基 π 系统显然直接与富电子的
Insights into the electrochemical degradation of phenolic lignin model compounds in a protic ionic liquid–water system
作者:Guangyong Liu、Qian Wang、Dongxia Yan、Yaqin Zhang、Chenlu Wang、Shijing Liang、Lilong Jiang、Hongyan He
DOI:10.1039/d0gc03551c
日期:——
(PBP), and 2-(2-phenylethoxy)phenol (2-PEP), in a protic ionicliquid [BSO3Hmim][OTf]–H2O electrolyte, and the electrocatalytic oxidation mechanism is also fully explored. The effects of H2O on the viscosity and conductivity of the [BSO3Hmim][OTf] ionicliquid system, as well as the solubility and diffusion coefficients of O2 and the four lignin substrates, are investigated to optimize the optimal ratio
AMINOETHYLATION PROCESS HAVING IMPROVED YIELD OF ARYLOXYALKYLENE AMINE COMPOUNDS AND REDUCED UREA BY-PRODUCTS
申请人:McDougall Patrick J.
公开号:US20140073814A1
公开(公告)日:2014-03-13
Disclosed is a process for preparing an aryloxyalkylene amine compound via an aminoethylation reaction comprising: a) reacting an aromatic hydroxyl compound in the presence of a basic catalyst with a 2-oxazolidinone compound of the formula II to form an intermediate reaction product;
wherein R
3
is selected from the group consisting of hydrogen or lower alkyl having 1 to 6 carbon atoms, R
4
is selected from the group consisting of hydrogen, straight or branched chain alkyl having from one to six carbon atoms, phenyl, alkaryl, or arylalkyl; and b) reacting the intermediate product of step a) with a polyalkylene polyamine.