Stereochemistry and Some Kinetic Aspects of Fluorination of Phenyl-Substituted Alkenes with Selectfluor<sup>TM</sup>Reagent F-TEDA-BF<sub>4</sub>
作者:Stojan Stavber、Tjaša Sotler-Pecan、Marko Zupan
DOI:10.1246/bcsj.69.169
日期:1996.1
while equal amounts of both diastereoisomers were formed in the case of (E)-1-phenyl-1-propene and acenaphthylene. In the phenyl-substituted benzocyclene series the stereochemistry of fluoro-alkoxylation was found to be dependent on ring size and on the structure of the alcohol. The resulting vicinal fluoroalkoxy adducts were transformed by heating in aqueous HBr to 2-fluoro-1-phenylbenzocyclenes. Correlation
Stereochemistry of room-temperature fluorination of alkenes with cesium fluoroxysulfate
作者:Stojan Stavber、Marko Zupan
DOI:10.1021/jo00381a035
日期:1987.3
1-Fluoro-4-hydroxy-1,4-diazoniabicyclo[2.2.2]octane bis(tetrafluoroborate) as a new, effective reagent for selective fluorofunctionalisation of alkenes under mild reaction conditions
作者:Stojan Stavber、Marko Zupan、Andrew J. Poss、George A. Shia
DOI:10.1016/00404-0399(50)1337-h
日期:1995.9
1-Fluoro-4-hydroxy-1,4-diazoniabicyclo[2.2.2]octane bis(tetrafluoroborate) (Accufluor(TM) NFTh) is confirmed as a highly effective reagent for introducing a fluorine atom into organic molecules across a phenyl-substituted carbon-carbon double bond. Quantitative and Markovnikov-type regioselective formation of vicinal fluoro-hydroxy, fluoro-methoxy or fluoro-acetoxy adducts was achieved when phenyl-substituted alkenes were treated with a MeCN solution of NFTh in the presence of water, methanol or acetic acid. The stereochemical course of fluoro-methoxylation reactions in the case of cyclic phenyl-substituted alkenes depends strongly on the structure of the alkene.
Effect of Reaction Conditions on the Kinetic and Activation Parameters for the Mild Introduction of Fluorine into Phenyl-Substituted Alkenes with Accufluor™ NFTh
作者:Stojan Stavber、Tjaša Sotler Pečan、Marko Zupan
DOI:10.1016/s0040-4020(00)00109-5
日期:2000.3
water had a negligible effect on the rate of the process, as well as the change of solvent polarity, indicating little change in the polarity of the rate-determining transition state in comparison with the reactants. Activation enthalpies (between 62 and 74 kJ mol−1) and activation enthropies (between −75 and −37 J mol−1 K−1) were determined for fluorination of 1 and 7 with NFTh in acetonitrile in the