Mn(III)-Mediated Reactions of Cyclopropanols with Vinyl Azides: Synthesis of Pyridine and 2-Azabicyclo[3.3.1]non-2-en-1-ol Derivatives
作者:Yi-Feng Wang、Shunsuke Chiba
DOI:10.1021/ja905110c
日期:2009.9.9
to the formation of 2-azabicyclo[3.3.1]non-2-en-1-ol derivatives using a catalytic amount of Mn(acac)(3). These reactions may be initiated by a radicaladdition of beta-keto radicals, generated by the one-electron oxidation of cyclopropanols, to vinyl azides to give iminyl radicals, which would cyclize with the intramolecular carbonyl groups. In addition, versatile transformations of 2-azabicyclo[3.3
Herein, we report a simple, phosphine-free, and inexpensive catalytic system based on a manganese(II) complex for synthesizing different important N-heterocycles such as quinolines, pyrroles, and pyridines from amino alcohols and ketones. Several control experiments, kinetic studies, and DFT calculations were carried out to support the plausible reaction mechanism. We also detected two potential intermediates
在此,我们报告了一种基于锰 (II) 配合物的简单、无膦且廉价的催化系统,用于从氨基醇和酮合成不同的重要 N-杂环化合物,如喹啉、吡咯和吡啶。进行了几个控制实验、动力学研究和 DFT 计算以支持合理的反应机制。我们还使用 ESI-MS 分析检测到催化循环中的两种潜在中间体。基于这些研究,提出了一种金属-配体协同机制。
CuO NPs catalyzed synthesis of quinolines, pyridines, and pyrroles via dehydrogenative coupling strategy
Copper oxide nanoparticles catalyzed efficient synthesis of quinolines, pyridines, and pyrroles via alcohol dehydrogenative coupling strategy are reported. Employing this catalytic system, various functionalized quinolines, pyridines, and pyrroles were synthesized efficiently from different amino alcohols with a diverse range of ketones. A number of control experiments were performed to shed light