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–
Catalyst‐Free Electrophilic Ring Expansion of
<i>N</i>
‐Unprotected Aziridines with
<i>α</i>
‐Oxoketenes to Efficient Access 2‐Alkylidene‐1,3‐Oxazolidines
作者:Xingpeng Chen、Zhengshuo Huang、Jiaxi Xu
DOI:10.1002/adsc.202100320
日期:2021.6.21
2-(2-Oxoalkylidene)-1,3-oxazolidine derivatives were synthesized in good to excellent yields regiospecifically through the catalyst-free electrophilic ringexpansion of N-unprotected aziridines and the ketene C=O double bond of α-oxoketenes, in situ generated from the microwave-assisted Wolff rearrangement of 2-diazo-1,3-diketones. The ringexpansion predominantly underwent an SN1 process and the hydrogen
2-(2-氧代亚烷基)-1,3-恶唑烷衍生物通过无催化剂的N-未保护氮丙啶和α-氧代烯酮的烯酮C=O双键的无催化剂亲电子环膨胀,以良好到优异的产率区域特异性地合成,原位由 2-重氮-1,3-二酮的微波辅助沃尔夫重排产生。环膨胀主要经历了 S N 1 过程,氢键决定了产物的 ( E )-构型。
Efficient synthesis of ethyl 2-(oxazolin-2-yl)alkanoates via ethoxycarbonylketene-induced electrophilic ring expansion of aziridines
作者:Yelong Lei、Jiaxi Xu
DOI:10.3762/bjoc.18.6
日期:——
2-(oxazolin-2-yl)alkanoates in good to excellent yields under microwave heating. The method is a convenient and clean reaction without any activators and catalysts and can be also applied in the synthesis of 2-(oxazolin-2-yl)alkanamides and 1-(oxazolin-2-yl)alkylphosphonates.
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。
[EN] ESTER SUBSTITUTED ION CHANNEL BLOCKERS AND METHODS FOR USE<br/>[FR] BLOQUEURS DE CANAUX IONIQUES SUBSTITUÉS PAR UN ESTER ET MÉTHODES D'UTILISATION
申请人:NOCION THERAPEUTICS INC
公开号:WO2020185915A1
公开(公告)日:2020-09-17
The invention provides compounds of Formula (I), or pharmaceutically acceptable salts thereof. The compounds, compositions, methods and kits of the invention are useful for the treatment of pain, itch, and neurogenic inflammation.