Micellar-System-Mediated Direct Fluorination of Ketones in Water
作者:Stojan Stavber、Gaj Stavber、Marko Zupan
DOI:10.1055/s-0028-1087924
日期:2009.3
A micellar system was developed and applied for direct regioselective fluorination of a variety of cyclic and acyclic ketones to α-fluoroketones in water as reaction medium with Selectfluor F-TEDA-BF 4 as fluorinating reagent. The inexpensive ionic amphiphile sodium dodecyl sulfate (SDS) was found to be an excellent promoter for fluorofunctionalization of hydrophobicketones without prior activation
Taming elemental fluorine: Indirect use of fluorine for the synthesis of α-fluoroketones[1]
作者:Shlomo Rozen、Ynon Menahem
DOI:10.1016/s0022-1139(00)85146-5
日期:1980.7
Fluorine and sodium trifluoroacetate react at −75° to produce a variety of fluoroxy-compounds. Although it is possible to direct the reaction towards the formation of CF3COOF or CF3CF2OF, mixtures may be used when only the electrophilicfluorine has to be attached to the molecule of interest. Such is the case of the reaction of enol-acetates with the mixture of the fluoroxy reagents. A wide variety
Chemistry of organo halogenic molecules. Part 100. Comparative behaviour of xenon diflouride and caesium fluoroxysulphate in the fluorination of enol acetates and ketones
Xenon difluoride and caesiumfluoroxysulphate reacted in methylene chloride or acetonitrile with various enol acetates, diketones, and ketones, yielding mainly α-fluoro ketones, the course of the reaction depending on the reagent and the structure of the organic molecule. Enol acetates from cycloakanones were converted with caesiumfluoroxysulphate to α-fluorocycloalkanones in high yield. Xenon difluoride
Room-temperature fluorination of alkenes with caesium fluoroxysulphate
作者:Stojan Stavber、Marko Zupan
DOI:10.1039/c39810000795
日期:——
Room-temperature fluorination of 1,1-diphenyl-ethene with caesiumfluoroxysulphate resulted in the formation of 2-fluoro-1,1-diphenylethene; norborn-2-ene gave only 7-fluoronortricyclene and 7-syn-fluoronorborn-2-ene, while reactions with various cyclic enol acetates gave α-fluorocycloalkanones in high yield.
The use of polar organic solvent as the solvent in the direct fluorination, to make an .alpha.-fluoroketone, of an enol ester or enol trialkylsilyl ether of a compound containing a tautomerisable ketone group, the solvent being relatively inert to fluorine and one in which the enol ester or enol trialkylsilyl ether is relatively stable to hydrolysis. Preferably the solvent is anhydrous, e.g. anhydrous acetonitrile. Alternatively commercial formic acid containing 3% water may be used with a said enol ester.