UNSATURATED NITROGEN COMPOUNDS CONTAINING FLUORINE. PART 7. THE REACTION OF 2,5-DICHLORO-1,1,1,6,6,6-HEXAFLUORO-3,4-DIAZAHEXA-2,4-DIENE WITH PHENYLLITHIUM

Article abstract of DOI:10.1016/S0022-1139(00)80496-0

Treatment of the title azine (1) with phenyl-lithium results in initial replacement of chlorine by phenyl to give the monophenylazine (4) and then the diphenylazine (5), but this is followed by successive replacement of fluorine in one CF3 group to afford first the 3,4-diazahexa-1,3-diene CF3CPh2N=NCPh=CXY (6) (X=Y=F), then (7) (X=F, Y=Ph) and finally (8) (X=Y=Ph).