70890-47-0Relevant academic research and scientific papers
Oxidation of Amino Derivatives of 1,2,4-Triazole
Kofman,Paketina
, p. 1125 - 1132 (2007/10/03)
Derivatives of 3-nitro-5-R-1,2,4-triazoles are prepared by oxidation of the corresponding amino-compounds in the system 30% hydrogen peroxide - sodium tungstate. The activity of aminotriazoles decreases with increasing electronacceptor ability. For substrates unsubstituted at the heteroatom the process is promoted by bases. 3,5-Diamino-1,2,4-triazole is oxidized in two steps, and substantial difference in the rates of of the first and second stages of oxidation yielding respectively (5-amino-3-nitro- and 3,5-dinitro-1,2,4-triazole allows isolation of the former in up to 60% yield. N,N′-Azoxy-3,3′-bis(5-amino-1,2,4-triazole) is formed as a by-product. In 1-substituted 3,5-diaminotriazoles only one, peripheral, amino group is oxidized to afford derivatives of 5-amino-3-nitro-1,2,4-triazole.
