From the primary amines are derived the diazo compounds and azo compounds; closely related are the hydrazines (q.v.).
The first class includes those substances which require no preliminary treatment, and comprises the amides and ammonium compounds, pyridines, quinolines, alkaloids, albumens and related bodies; the second class requires preliminary treatment and comprises, with few exceptions, the nitro-, nitroso-, azo-, diazoand amidoazo-compounds, hydrazines, derivatives of nitric and nitrous acids, and probably cyanogen compounds.
Bamberger, Ber., 1893, 26, p. 2786): CsH5N :N N :N jC COC6H5 - C6H5NH2+C6H4K C 6 H5 NH N N:C 0006H5; by the reduction of symmetrical acyl-ortho-nitrophenyl hydrazines (e.g.
The keto-dihydrotriazoles or triazolones are obtained by the action of hydrazines on acetyl urethane (A.
Chemie, 1866, 2, p. 308), on account of their ready condensation to form azo compounds and their easy reduction to hydrazines, assumed that they were substances of the type R N: N Cl.