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...
Multifaceted ion exchange resin-supported hydrogen fluoride: a path to flow hydrofluorination
作者:Zhichao Lu、Bhvandip S. Bajwa、Okoromoba E. Otome、Gerald B. Hammond、Bo Xu
DOI:10.1039/c8gc03166e
日期:——
solid anhydrous hydrogen fluoride equivalent was prepared by mixing HF gas with an inexpensive anion exchange resin (A26-HF, HF content 30% wt/wt). This reagent is capable of hydrofluorinating alkenes, of ring-opening aziridines to give fluoroamines, and of yielding fluorotetrahydropyrans through a fluoro-Prins reaction, all with high selectivity under mild conditions. Our ionexchange resin supported
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.
Regioselective ring opening of 2-methylaziridine derivatives with 18F- and 19F-fluoride
作者:Erik M. van Oosten、Michael Gerken、Paul Hazendonk、Roxanne Shank、Sylvain Houle、Alan A. Wilson、Neil Vasdev
DOI:10.1016/j.tetlet.2011.05.139
日期:2011.8
Regioselectivity of the nucleophilic ringopening of N-benzoyl (Bz) and N-benzyloxycarbonyl (Cbz) activated 2-methylaziridines with anhydrous tetramethylammonium fluoride, anhydrous hydrogenfluoride, and 19F or [18F]-labelled potassium cryptand fluoride ([K222][18/19F]) were investigated. Whereas all reactions with rigorously anhydrous N(CH3)4F did not ring-open the aziridines, reactions with anhydrous