Ruthenium-Catalyzed Nitro and Nitrile Compounds Coupling with Alcohols: Alternative Route for N-Substituted Amine Synthesis
作者:Xinjiang Cui、Yan Zhang、Feng Shi、Youquan Deng
DOI:10.1002/chem.201003095
日期:2011.2.25
The one‐pot synthesis of N‐substituted secondary amines from nitrobenzenes and benzonitriles has been developed (see scheme). This report presents a versatile and simple method for the synthesis of N‐substituted amines in excellent yield and high efficiency from nitro and nitrile compounds with alcohols.
efficient copper-catalyzed selectivetransferhydrogenation of nitriles to primary amine-boranes and secondary amines with an oxazaborolidine–BH3 complex is reported. The selectivity control was achieved under mild conditions by switching the solvent and the copper catalysts. More than 30 primary amine-boranes and 40 secondary amines were synthesized via this strategy in high selectivity and yields of up to
Electrochemical, Iodine-Mediated α-CH Amination of Ketones by Umpolung of Silyl Enol Ethers
作者:Julia Strehl、Gerhard Hilt
DOI:10.1021/acs.orglett.0c02068
日期:2020.8.7
oxidative Umpolung reaction of silyl enol ethers utilizing simple iodide salts for the synthesis of α-amino ketones is described. The products were isolated in excellent yields of up to 100%, and various functionalized starting materials were accepted in an undivided electrochemical cell design. Moreover, a sensitivity assessment to ensure an improved reproducibility of the reaction and cyclic voltammetry
Effective reductive amination of carbonyl compounds with hydrogen catalyzed by iridium complex in organic solvent and in ionic liquid
作者:Daisuke Imao、Shoichiro Fujihara、Takeshi Yamamoto、Tetsuo Ohta、Yoshihiko Ito
DOI:10.1016/j.tet.2005.05.024
日期:2005.7
compounds with amines has been achieved using homogenous iridiumcatalyst and gaseous hydrogen. It appeared that the cationic iridiumcatalyst, [Ir(cod)2]BF4, without any other ligands was sufficient for the reaction. For the DRA of the ketone substrates, an ionicliquid, [Bmim]BF4, was found to be superior to the other organic solvent used. Especially, the counter anion of the ionicliquid has a significant
Reconfigurable system for automated optimization of diverse chemical reactions
作者:Anne-Catherine Bédard、Andrea Adamo、Kosi C. Aroh、M. Grace Russell、Aaron A. Bedermann、Jeremy Torosian、Brian Yue、Klavs F. Jensen、Timothy F. Jamison
DOI:10.1126/science.aat0650
日期:2018.9.21
plug-and-play, continuous-flow chemical synthesis system that mitigates this challenge with an integrated combination of hardware, software, and analytics. The system software controls the user-selected reagents and unit operations (reactors and separators), processes reaction analytics (high-performance liquid chromatography, mass spectrometry, vibrational spectroscopy), and conducts automated optimizations
自优化反应器 化学家花费大量时间调整已知反应的条件。温度和浓度的微小变化会对产品产量产生很大影响。贝达德等人。提出一个基于流的反应平台,可以自动执行这项艰巨的任务。通过使用来自集成分析的反馈,系统会收敛到最佳条件,然后可以高精度地应用这些条件。一系列具有加热、冷却、混合和光化学功能的模块可以配置用于广泛的反应。这些包括均相和非均相钯催化的交叉偶联、还原胺化以及在惰性气氛下生成敏感中间体。科学,这个问题 p。1220 基于流动的模块化系统使用实时反馈来优化有机化学中广泛使用的反应条件。化学合成通常需要劳动密集型的、有时是乏味的、反复试验的反应条件优化。在这里,我们描述了一种即插即用、连续流动的化学合成系统,它通过硬件、软件和分析的集成组合来缓解这一挑战。系统软件控制用户选择的试剂和单元操作(反应器和分离器),处理反应分析(高效液相色谱、质谱、振动光谱),并进行自动优化。该系统的能力在 CC 和