Formation of polyfluorinated azobenzenes and azophenols in the reactions of chloropentafluoro-cyclohexa-2,5- and -2,4-dienones with phenyl- and pentafluorophenylhydrazines
摘要:
4-Chloropentafluorocyclohexa-2,5-dienone reacted with phenyl- and pentafluorophenylhydrazines in the presence of AlCl3 via addition to the carbonyl group with formation of the corresponding azobenzenes. The reaction of 6-chloropentafluorocyclohexa-2,4-dienone with phenyl- and pentafluorophenylhydrazines both in the presence and in the absence of AlCl3 afforded mainly 3-arylazotetrafluorophenols as products of nucleophilic replacement of fluorine atom at the double C=C bond.