Hexafluoroisopropyl groups were introduced into fluorinated aromatic systems using 2H-pentafluoropropene and caesium fluoride. Reaction with pentafluoronitrobenzene gave a fluorinated isoxazole and a mechanism is advanced for this reaction. Direct observation of fluorinated benzyl anion derivatives has been possible and effects on fluorine chemical shifts are discussed.
R. D. Chambers, M. P. Greenhall and M. J. Seabury, J. Chem. Soc., Perkin Trans. 1, 1991, 2061 DOI: 10.1039/P19910002061
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