Nickel-Catalyzed Amination of Aryl Chlorides with Amides
作者:Jinpeng Li、Changyu Huang、Daheng Wen、Qingshu Zheng、Bo Tu、Tao Tu
DOI:10.1021/acs.orglett.0c03836
日期:2021.2.5
nickel-catalyzed amination of aryl chlorides with diverse amides via C–N bond cleavage has been realized under mild conditions. A broad substrate scope with excellent functional group tolerance at a low catalyst loading makes the protocol powerful for synthesizing various aromatic amines. The aryl chlorides could selectively couple to the amino fragments rather than the carbonyl moieties of amides. Our protocol
Synergistic catalysis of Cu+/Cu0 for efficient and selective N-methylation of nitroarenes with para-formaldehyde
作者:Xiaosu Dong、Zhaozhan Wang、Youzhu Yuan、Yong Yang
DOI:10.1016/j.jcat.2019.06.022
日期:2019.7
species as the dominant sites on the surface during the reduction process. The resultant catalyst Cu/Al2O3 demonstrates high catalytic activity, selectivity and durability for the reductive N-methylation of easily available nitroarenes in a cost-efficient, environmentally friendly and cascade manner. A broad spectrum of nitroarenes could be efficiently N-methylated to their corresponding N,N-dimethyl amines
本文研究了一种廉价的非均相铜纳米颗粒催化剂,该催化剂是通过原位全位转化过程从CuAl层状双氢氧化物衍生而来的。具有均一尺寸的Cu纳米颗粒均匀地分散在无定形的Al 2 O 3上,具有很强的金属-载体相互作用。表征结果表明,在还原过程中,Cu 0和Cu +与Cu +物种同时形成为表面上的主要位点。所得催化剂Cu / Al 2 O 3对还原性N具有高催化活性,选择性和耐久性。以经济高效,环境友好和级联的方式对易得的硝基芳烃进行甲基化。可以将各种硝基芳烃有效地进行N-甲基化,使其与相应的N,N-二甲基胺形成各种官能团的良好相容性。该协议还适用于生物学和药学活性硝基分子的后期功能化。结构-功能关系表明,Cu 0和Cu +位点以协同方式显着提高了反应效率,其中Cu 0可以促进苯胺的H 2生成和N-甲基化,而Cu +的活性显着提高,并参与了硝基芳烃的选择性N-甲基化的整个过程。此外,该催化剂还显示出很强
[EN] THERAPEUTIC AGENTS I<br/>[FR] AGENTS THERAPEUTIQUES I
申请人:ASTRAZENECA AB
公开号:WO2005066132A1
公开(公告)日:2005-07-21
Compounds of formula(I), processes for preparing such compounds, their use in the treatment of obesity, psychiatric disorders, cognitive disorders, memory disorders, schizophrenia, epilepsy, and related conditions, and neurological disorders such as dementia, multiple sclerosis, Parkinson's disease, Huntington's chorea and Alzheimer's disease and pain related disorders, and pharmaceutical compositions containing them.
<i>N</i>
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<i>N</i>
‐Dialkylhydrazones as Versatile Umpolung Reagents in Enantioselective Anion‐Binding Catalysis
作者:Melania Gómez‐Martínez、María Carmen Pérez‐Aguilar、Dariusz G. Piekarski、Constantin G. Daniliuc、Olga García Mancheño
DOI:10.1002/anie.202013380
日期:2021.3
ion‐pair complex was envisioned. The formation of such a network was further supported by both experimental and computationalstudies, which showed the crucial role of the anion as a template unit. The asymmetric Reissert‐type reaction of quinolines as a model test reaction chemoselectively delivered highly enantiomerically enriched hydrazones (up 95:5 e.r.) that could be further derivatized to value‐added
Synthesis, Electrochemical and Spectroscopic Characterization of Selected Quinolinecarbaldehydes and Their Schiff Base Derivatives
作者:Jakub Wantulok、Marcin Szala、Andrea Quinto、Jacek E. Nycz、Stefania Giannarelli、Romana Sokolová、Maria Książek、Joachim Kusz
DOI:10.3390/molecules25092053
日期:——
A new approach to the synthesis of selected quinolinecarbaldehydes with carbonyl groups located at C5 and/or in C7 positions is presented in this paper in conjunction with spectroscopic characterization of the products. The classical Reimer-Tiemann, Vilsmeier-Haack and Duff aldehyde synthesis methods were compared due to their importance. Computational studies were carried out to explain the preferred