Used Galvinoxyl as catalyst, the phase transfer catalyzed method of oxidati
on of primary amines to symmetrical azobenzenes with st saturated solution
of potassium ferricyanide in 2N aqueous potassium hydroxide and dichloromet
hane is described for the first time in this paper. The reaction has intima
te relation with Hammett substituent constants. This report offers an effic
ient and rapid method to prepare azobenzenes and a possible mechanism is al
so suggested.