New Method of Fluorination Using Potassium Fluoride in Ionic Liquid: Significantly Enhanced Reactivity of Fluoride and Improved Selectivity
作者:Dong Wook Kim、Choong Eui Song、Dae Yoon Chi
DOI:10.1021/ja026242b
日期:2002.9.1
have found the new nucleophilic fluorination reaction of some halo- and mesylalkanes to the corresponding fluoroalkanes with KF in the presence of [bmim][BF4] under various reaction conditions. 2-(3-Methanesulfonyloxypropoxy)naphthalene (1) was used as a model compound to optimize this fluorination reaction. Whereas the fluorination of the mesylate 1 with KF in an organic solvent such as CH3CN at 100
A New Class of S<sub>N</sub>2 Reactions Catalyzed by Protic Solvents: Facile Fluorination for Isotopic Labeling of Diagnostic Molecules
作者:Dong Wook Kim、Doo-Sik Ahn、Young-Ho Oh、Sungyul Lee、Hee Seup Kil、Seung Jun Oh、Sang Ju Lee、Jae Seung Kim、Jin Sook Ryu、Dae Hyuk Moon、Dae Yoon Chi
DOI:10.1021/ja0646895
日期:2006.12.1
Aprotic solvents are usually preferred for the SN2 reactions, because nucleophilicity and hence SN2 reactivity are severely retarded by the influence of the partial positive charge of protic solvents. In this work, we introduce a remarkable effect of using tertiary alcohols as a reaction medium for nucleophilic fluorination with alkali metal fluorides. In this novel synthetic method, the nonpolar protic