CeO<sub>2</sub> nanorods anchored on mesoporous carbon as an efficient catalyst for imine synthesis
作者:Longlong Geng、Jinling Song、Yahui Zhou、Yan Xie、Jiahui Huang、Wenxiang Zhang、Luming Peng、Gang Liu
DOI:10.1039/c6cc05496j
日期:——
CeO2 nanorods anchored on mesoporous carbon exhibit high activity and stability in aerobic oxidative coupling of alcohol and amine to imine. The abundant surface Ce3+ and the suitable interaction between...
Aerobic oxidative coupling of alcohols and amines to imines over iron catalysts supported on mesoporous carbon
作者:Longlong Geng、Jinling Song、Bin Zheng、Shujie Wu、Wenxiang Zhang、Mingjun Jia、Gang Liu
DOI:10.1016/s1872-2067(16)62506-8
日期:2016.9
redox mechanism. The oxygen species in FeO x /HCMK-3 participate in the reaction and are then regenerated by oxidation with molecular O 2 . The reaction involves two consecutive steps: oxidative dehydrogenation of an alcohol to an aldehyde and coupling of the aldehyde with an amine to give an imine. Oxidative dehydrogenation of the alcohol is the rate-determining step in the reaction.
以空气或分子氧为氧源的醇和胺的直接氧化偶联是一种环境友好的亚胺合成方法。我们为该反应开发了一种负载在介孔碳(由 FeO x /HCMK-3 表示)上的 Fe 催化剂,具有优异的活性和可回收性。FeO x /HCMK-3 是通过用硝酸铁溶液浸渍 HNO 3 处理的介孔碳 (CMK-3) 制备的。高度分散的 FeO x 物质赋予 FeO x /HCMK-3 高还原性,并负责高催化性能。FeO x /HCMK-3 上的亚胺合成遵循氧化还原机制。FeO x /HCMK-3 中的氧物种参与反应,然后通过与分子 O 2 氧化而再生。该反应包括两个连续的步骤:醇氧化脱氢为醛,醛与胺偶联得到亚胺。醇的氧化脱氢是反应中的限速步骤。
A novel straightforward synthesis of α-aminophosphonates: one-pot three-component condensation of alcohols, amines, and diethylphosphite in the presence of CuO@Fe3O4 nanoparticles as a catalyst
here a novel and straightforward synthesis method for the preparation of α-aminophosphonates in relatively good yield. The method involves the one-pot three-component condensation of alcohols, amines, and diethylphosphite in the presence of CuO@Fe3O4 nanoparticles as a recyclable catalyst. CuO@Fe3O4 nanoparticles were prepared and their structures were confirmed by the FT-IR, TGA, VSM, TEM and X-ray
我们在这里报告了一种新颖而直接的合成方法,用于以相对较高的产率制备α-氨基膦酸酯。该方法涉及在CuO @ Fe 3 O 4纳米颗粒作为可循环利用催化剂的情况下,将醇,胺和亚磷酸二乙酯进行一锅三组分缩合。制备了CuO @ Fe 3 O 4纳米粒子,并通过FT-IR,TGA,VSM,TEM和X射线衍射图谱分析证实了其结构。
Ruthenium(II)‐(Arene)‐N‐Heterocyclic Carbene Complexes: Efficient and Selective Catalysts for the
<i>N</i>
‐Alkylation of Aromatic Amines with Alcohols
characterized by 1 H NMR, 13 C NMR and FT-IR spectroscopy techniques. The catalytic activity of the ruthenium complexes has been evaluated with respect to the mono-N-alkylation reactions of aromatic amines with various alcohol derivatives under solvent-free conditions at 120 o C using the borrowing hydrogen strategy.
一系列不对称的 1,3-二取代苯并咪唑氯化物被合成为 N-杂环卡宾 (NHC) 前体。这些化合物用于合成 [RuCl2(芳烃)(NHC)] 类型的新型钌 (II) 配合物,(芳烃 = η 6-p-伞花烃)。所有化合物的结构均通过 1 H NMR、 13 C NMR 和 FT-IR 光谱技术表征。使用借氢策略,在无溶剂条件下,在 120 o C 下,对芳香胺与各种醇衍生物的单-N-烷基化反应评估了钌配合物的催化活性。