A new and rapid synthetic method of diaryl carbazone (ArN=NCONHNHAr) from a
ryl substituted carbazide is reported for the first time. Eight of the comp
ounds were prepared by oxidation of aryl substituted carbazide using N-Brom
osuccinimide and pyridine as the oxidation system in good yield under mild
condition. This method only need simple instrument and short reaction time.
A possible mechanism is suggested.