Achieving regio- and stereo-control in the fluorination of aziridines under acidic conditions
作者:Otome E. Okoromoba、Zhou Li、Nicole Robertson、Mark S. Mashuta、Uenifer R. Couto、Cláudio F. Tormena、Bo Xu、Gerald B. Hammond
DOI:10.1039/c6cc07855a
日期:——
We developed an efficient fluorination protocol that converts easily accessible aziridines into [small beta]-fluoroamines, which are important motifs in biologically active molecules. In contrast with traditional fluorination approaches, DMPU-HF has shown...
Highly efficient regio-selective ring-opening nucleophilic fluorination of aziridines and azetidines: access to β- or γ-fluorinated amino acid derivatives
presented a facile and efficient method of ring-opening nucleophilicfluorination of aziridines, affording highly regio-selective β-fluorinated amines. Firstly, the example of ring-opening hydrofluorination of azetidines was reported. Then, the Olah's reagent also provided a promising method for the construction of enantioenriched β-fluoro-α-amino acid derivatives, which could be used for the preparation
CATALYSTS, METHODS OF MAKING, AND METHODS OF HYDROFLUORINATION
申请人:UNIVERSITY OF LOUISVILLE RESEARCH FOUNDATION, INC.
公开号:US20210275998A1
公开(公告)日:2021-09-09
Some embodiments of the invention include inventive catalysts (e.g., catalysts of Formula (I)). Other embodiments include compositions comprising the inventive catalysts. Some embodiments include methods of using the inventive catalysts (e.g., in hydrofluorination of an organic compound). Further embodiments include methods for making the inventive catalysts. Additional embodiments of the invention are also discussed herein.
(NHC)M Cores as Catalysts for the Olefin Aziridination Reaction (M = Cu, Ag, Au): Evidencing a Concerted Mechanism for the Nitrene Transfer Process
作者:Jorge Pérez-Ruíz、Pedro J. Pérez、M. Mar Díaz-Requejo
DOI:10.1021/acs.organomet.2c00310
日期:2022.11.28
Complexes of the form [(NHC)MCl] (M = coinage metal) have been evaluated as catalysts for the olefin aziridination reaction using PhI═NTs as the nitrene source, with moderate to high activity being found depending on the metal and the olefin. At variance with frequently employed copper catalysts with bi-, tri-, or tetradentate N-donor ligands, these monodentante C-donor ligands induce a remarkable
[(NHC)MCl](M = 铸币金属)形式的配合物已被评估为使用 PhI = NT 作为氮烯源的烯烃氮丙啶化反应的催化剂,根据金属和烯烃发现具有中等至高活性。与经常使用的具有双、三或四齿 N-供体配体的铜催化剂不同,这些单齿 C-供体配体在反应机制中产生显着影响。实验证据支持协同机制和不存在自由基中间体的提议,自由基中间体是参与这些氮烯转移反应的常见物种。