Reactions involving fluoride ion. Part 35. Fluorinated derivatives of benzyl anions
Abstract
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.