Structure and Reactivity of a Manganese(VI) Nitrido Complex Bearing a Tetraamido Macrocyclic Ligand
作者:Huatian Shi、Hung Kay Lee、Yi Pan、Kai-Chung Lau、Shek-Man Yiu、William W. Y. Lam、Wai-Lun Man、Tai-Chu Lau
DOI:10.1021/jacs.1c08072
日期:2021.9.29
Manganese complexes in +6 oxidation state are rare. Although a number of Mn(VI) nitrido complexes have been generated in solution via one-electron oxidation of the corresponding Mn(V) nitrido species, they are too unstable to isolate. Herein we report the isolation and the X-ray structure of a Mn(VI) nitrido complex, [MnVI(N)(TAML)]– (2), which was obtained by one-electron oxidation of [MnV(N)(TAML)]2–
dioxide, highlighting the superior activity of [NH2Et2]I. Then, working at room temperature, atmospheric CO2 pressure and in the absence of solvent, the [NH2Et2]I-catalyzed synthesis of a series of 5-aryl-2-oxazolidinones was accomplished in good to high yields and excellent selectivity, from 2-aryl-aziridines with N-methyl or N-ethyl groups. NMR studies and DFT calculations outlined the pivotal role of
在模型氮丙啶与二氧化碳的偶联反应中探索了卤化铵盐的催化潜力,突出了 [NH 2 Et 2 ]I 的优越活性。然后,在室温、大气 CO 2压力和无溶剂条件下,[NH 2 Et 2 ]I 催化合成一系列 5-aryl-2-oxazolidinones 以良好至高产率和优异的选择性完成, 来自具有N-甲基或N的 2-芳基-氮丙啶-乙基。NMR 研究和 DFT 计算概述了二乙基铵阳离子和碘化物阴离子的关键作用。所提出的方法代表了一种方便的选择,用于获得有限数量的有价值的分子,即使在最近几年也已经报道了更复杂和更昂贵的催化系统。