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
This invention relates to derivatives of acrylic acid useful as fungicides, to processes for preparing them, to fungicidal compositions containing them, and to methods of combating fungi, especially fungal infections in plants, using them.
Synthesis of Aromatic Ethers Without Organic Solvent and Inorganic Carrier under Microwave Irradiation
作者:Jin-Xian Wang、Manli Zhang、Zhiliang Xing、Yulai Hu
DOI:10.1080/00397919608003618
日期:1996.1
Abstract A simple, repid and efficient procedure for the synthesis of aromatic ethers via microwaveirradiationwithout any organic solvent and inorganic carrier is reported.
摘要 报道了一种无需任何有机溶剂和无机载体的微波辐射合成芳香醚的简单、快速、高效的方法。
Reaction of phenols with α-chloro-ketones in the presence of potassium iodide
作者:M. K. M. Dirania、J. Hill
DOI:10.1039/j39690002144
日期:——
α-Chloro-ketones (R1CHCl·COR2) reacted with phenols in acetone or ethyl methyl ketone, in the presence of potassium iodide and potassium carbonate, to give the expected α-aryloxy-ketone (ArO·CHR1·COR2) and, in many cases, two further products. These were the corresponding ketone (R1CH2·COR2), and the product of a reaction of the phenol with the solvent [ArO·CH2Ac or ArO·CH(Me)Ac] which was formed in
Pyridopyrimidine protein tyrosine phosphatase inhibitors
申请人:Berthel Joseph Steven
公开号:US20070021445A1
公开(公告)日:2007-01-25
The present invention comprises pyridopyrimidinediamine compounds of the general formula I:
The compounds of the present invention are potent inhibitors of PTP1B. Accordingly, the invention also encompasses pharmaceutical compositions and methods of treating or preventing PTP-1B mediated diseases, including diabetes, obesity, and diabetes-related diseases.
Cleavage∕cross-coupling strategy for converting β-O-4 linkage lignin model compounds into high valued benzyl amines via dual C–O bond cleavage
作者:Le Jia、Chao-Jun Li、Huiying Zeng
DOI:10.1016/j.cclet.2021.08.125
日期:2022.3
Lignin is the most recalcitrant of the three components of lignocellulosic biomass. The strength and stability of the linkages have long been a great challenge for the degradation and valorization of lignin biomass to obtain bio-fuels and commercial chemicals. Up to now, the selectivecleavage of C–O linkages of lignin to afford chemicals contains only C, H and O atoms. Our group has developed a c