Reaction of hexafluoroacetone and trifluoroacetylimines of polyfluorocarbonyl compounds with derivatives of pyrimidine

1. 4-Aminopyrimidines react with hexafluoroacetone to give pyrimidooxazines and pyrimidooxadiazines. 2. An account is given of the C5 aminoalkylation of 1,3-dimethyluracil by the trifluoroacetylimines of hexafluoroacetone and of the methyl ester of trifluoropyruvic acid.