Nucleophilic attack on hexafluorobenzene by N-methylformamide, treated
with different bases, gave N-methyl-2,3,4,5,6-pentafluoroformanilide,
-dimethyl-2,3,5,6-tetrafluorophenylene-1,4-diamine and dimethyl-2,3,5
,6-tetrafluorophenylene-1,4-diamine. The substituted benzenes could be
hydrolyzed to N-methyl-2,3,4,5,6-pentafluoroaniline and dimethyl-2,3,
5,6-tetrafluorophenylene-1,4-diamine.