ABSTRACT
A survey of the literature reveals that there are three general methods for preparing hydroxytriazenes. The first method involves the reaction of nitrobenzene or substituted nitrobenzene with phenyl or substituted phenylhydrazine to obtain hydroxytriazene. The second method is most convenient and hence a commonly used method for preparing hydroxytriazenes. Ease of preparation and good yield with minimum synthetic assembly are the advantages of this method over the other two methods. The method involves the coupling of an alkyl or aryl hydroxylamine with an aryl diazonium salt at 0—5 degrees Celsius in a 1:1 molar ratio at a neutral pH. In the third method, the oxidation of diazomino benzene is facilitated with peroxybenzoic acid under mild conditions with a suitable solvent to yield a hydroxytriazene. A very simple test using sulfuric acid is described for detecting hydroxytriazenes. The general structure of hydroxytriazenes or their analogues can be represented by the structure of 3-hydroxy-1,3-diphenyltriazene.
