1.Hexafluoroacetone N-perfluoropivaloylimine was obtained by condensation of α-chloroperfluoroisopropyl isocyanate with perfluoro-tert-butyl anion. The compound readily adds nucleophiles, and enters into 1,4-cycloaddition reactions with nitriles, carbonyl compounds, and trimethyl phosphite.2.Cycloadducts of hexafluoroacetone acylimines with acetophenone isomerize on heating into linear ketoamides.3.By the action of pyridine, hexafluoroacetone perfluoroplvaloylimine splits into perfluoroisopropyl isocyanate and perfluoroisobutylene