Facile Synthesis of (S,S)‐1,2‐Diacylamides and (S,S)‐1,2‐Diamines with C2‐Symmetry
摘要:
A series of chiral vicinal tertiary diacylamides with C-2-symmetry was synthesized from (S)-alpha-phenylethylamine, different aromatic aldehydes, and oxalyl chloride. The diacylamides obtained were then reduced to afford chiral vicinal diamines with C-2-symmetry. We propose that the diacylamides existed in four stable conformational isomers in solution because of the dihedral angle between acylamide bonds.
Facile Synthesis of (S,S)‐1,2‐Diacylamides and (S,S)‐1,2‐Diamines with C2‐Symmetry
摘要:
A series of chiral vicinal tertiary diacylamides with C-2-symmetry was synthesized from (S)-alpha-phenylethylamine, different aromatic aldehydes, and oxalyl chloride. The diacylamides obtained were then reduced to afford chiral vicinal diamines with C-2-symmetry. We propose that the diacylamides existed in four stable conformational isomers in solution because of the dihedral angle between acylamide bonds.
A series of chiral cyclometalated iridiumcomplexes have been synthesised by cyclometalating chiral 2-aryl-oxazoline and imidazoline ligands with [Cp*IrCl2]2. These iridacycles were studied for asymmetric transfer hydrogenation reactions with formic acid as the hydrogen source and were found to display various activities and enantioselectivities, with the most effective ones affording up to 63% ee
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
METHOD FOR PRODUCING OPTICALLY ACTIVE VINYLCYCLOPROPANECARBOXYLIC ACID DERIVATIVE AND OPTICALLY ACTIVE VINYLCYCLOPROPANEAMINO ACID DERIVATIVE
申请人:Tanaka Tatsuyoshi
公开号:US20110245529A1
公开(公告)日:2011-10-06
The objective of the present invention is to provide a method for obtaining an optically active vinylcyclopropanecarboxylic acid derivative with high yield and high optical purity using a safe material available at low cost. In addition, the objective of the present invention is to provide a method for safely-obtaining an optically active vinylcyclopropaneamino acid with high optical purity at low cost. The problems can be solved by a method for obtaining an optically active vinylcyclopropanecarboxylic acid derivative, which method contains the step of reacting a racemic vinylcyclopropanecarboxylic acid derivative with an optically active amine compound, to obtain a diastereomer salt of optically active vinylcyclopropanecarboxylic acid derivative-amine compound. In addition, it is possible to obtain a vinylcyclopropaneamino acid by deriving the vinylcyclopropaneamino acid from thus obtained diastereomer salt of optically active vinylcyclopropanecarboxylic acid derivative-amine compound.
OPTICALLY ACTIVE VINYL-CYCLOPROPANE CARBOXYLIC ACID DERIVATIVE AND OPTICALLY ACTIVE VINYL-CYCLOPROPANE AMINO ACID DERIVATIVE MANUFACTURING METHOD
申请人:Kaneka Corporation
公开号:EP2345633A1
公开(公告)日:2011-07-20
The objective of the present invention is to provide a method for obtaining an optically active vinylcyclopropanecarboxylic acid derivative with high yield and high optical purity using a safe material available at low cost. In addition, the objective of the present invention is to provide a method for safely-obtaining an optically active vinylcyclopropaneamino acid with high optical purity at low cost. The problems can be solved by a method for obtaining an optically active vinylcyclopropanecarboxylic acid derivative, which method contains the step of reacting a racemic vinylcyclopropanecarboxylic acid derivative with an optically active amine compound, to obtain a diastereomer salt of optically active vinylcyclopropanecarboxylic acid derivative - amine compound. In addition, it is possible to obtain a vinylcyclopropaneamino acid by deriving the vinylcyclopropaneamino acid from thus obtained diastereomer salt of optically active vinylcyclopropanecarboxylic acid derivative - amine compound.