Copper-Mediated C–N Coupling of Arylsilanes with Nitrogen Nucleophiles
作者:Johannes Morstein、Eric D. Kalkman、Chen Cheng、John F. Hartwig
DOI:10.1021/acs.orglett.6b02543
日期:2016.10.21
A method for the oxidative coupling of arylsilanes with nitrogen nucleophiles is reported. This method occurs with a broad range of heptamethyltrisiloxylarenes and nitrogen nucleophiles, proceeds with the arylsilane as limiting reagent, and does not require a fluoride activator with electron-poor arylsilanes. The combination of this method with C–H silylation generates arylamines from unactivated arenes
Additive-Free Chemoselective Acylation of Amines and Thiols
作者:Mohammad M. Mojtahedi、M. Saeed Abaee、Majid M. Heravi、Farahnaz K. Behbahani
DOI:10.1007/s00706-006-0564-3
日期:2007.1
Amines with different stereoelectronic nature were efficiently acylated at room temperature using acetic anhydride in the presence of no solvent or additive. Various thiols also react equally well under the same conditions. Chemoselective protection of amines in the presence of thiols, alcohols, and phenols and of thiols in the presence of alcohols, and phenols were achieved using competitive experiments
[EN] AUTOTAXIN INHIBITOR COMPOUNDS<br/>[FR] COMPOSÉS INHIBITEURS DE L'AUTOTAXINE
申请人:PHARMAKEA INC
公开号:WO2015048301A1
公开(公告)日:2015-04-02
Described herein are compounds that are autotaxin inhibitors, methods of making such compounds, pharmaceutical compositions and medicaments comprising such compounds, and methods of using such compounds in the treatment of conditions, diseases, or disorders associated with autotaxin activity.
Cu(OTf)
<sub>2</sub>
‐Mediated Cross‐Coupling of Nitriles and N‐Heterocycles with Arylboronic Acids to Generate Nitrilium and Pyridinium Products**
作者:Nicola L. Bell、Chao Xu、James W. B. Fyfe、Julien C. Vantourout、Jeremy Brals、Sonia Chabbra、Bela E. Bode、David B. Cordes、Alexandra M. Z. Slawin、Thomas M. McGuire、Allan J. B. Watson
DOI:10.1002/anie.202016811
日期:2021.3.29
Metal‐catalyzed C–N cross‐coupling generally forms C−N bonds by reductive elimination from metalcomplexes bearing covalent C‐ and N‐ligands. We have identified a Cu‐mediated C–N cross‐coupling that uses a dative N‐ligand in the bond‐forming event, which, in contrast to conventional methods, generates reactive cationic products. Mechanistic studies suggest the process operates via transmetalation of
金属催化的 C-N 交叉偶联通常通过带有共价 C 和 N 配体的金属配合物的还原消除来形成 C-N 键。我们已经确定了一种 Cu 介导的 C-N 交叉偶联,该偶联在成键事件中使用了配位 N 配体,与传统方法相反,它会生成反应性阳离子产物。机理研究表明,该过程是通过芳基有机硼向带有中性 N 配体(例如腈或 N 杂环)的Cu II络合物的金属转移来进行的。随后生成的假定的 Cu III络合物使氧化 C-N 偶联发生,从而产生硝中间体和吡啶产物。该反应对于一系列 N(sp) 和 N(sp 2 ) 前体是通用的,可应用于药物合成和后期 N-芳基化,并且从机制上证明了该方法的局限性。
Copper‐Catalyzed Site‐Selective Oxidative C−C Bond Cleavage of Simple Ketones for the Synthesis of Anilides and Paracetamol
作者:Nagaraju Vodnala、Raghuram Gujjarappa、Chinmoy K. Hazra、Dhananjaya Kaldhi、Arup. K. Kabi、Uwe Beifuss、Chandi C. Malakar
DOI:10.1002/adsc.201801096
日期:2019.1.11
functional‐group compatibility and wide substrate scope. The developed method avoids the use of sensitive and narcotic agents. The method also represents an excellent complement to the previous protocols with lower E‐factor (13.91 mg/1 mg) than current industrially used method (E‐factor 17.54 mg/1 mg). The developed approach has also been extended for the effective preparation of pyridinederivatives and