Solid phase synthesis of functionalized indazoles using triazenes – scope and limitations was written by Garcia, Ana Maria;Jung, Nicole;Gil, Carmen;Nieger, Martin;Braese, Stefan. And the article was included in RSC Advances in 2015.Electric Literature of C7H4Br2N2 This article mentions the following:
A modular synthesis of highly substituted indazoles via a strategy on solid supports was discussed. The heterocyclic nitrogen atoms originated from diazonium salts, being cleaved from triazene containing resins. The scope and limitations of this process was explored, considering especially the competitive occurrence of triazines and the cleavage of hydrolyzed and traceless side products. In the experiment, the researchers used many compounds, for example, 2-Amino-3,5-dibromobenzonitrile (cas: 68385-95-5Electric Literature of C7H4Br2N2).
2-Amino-3,5-dibromobenzonitrile (cas: 68385-95-5) belongs to nitriles. The electronic structure of nitriles is very similar to that of an alkyne with the main difference being the presence of a set of lone pair electrons on the nitrogen. Industrially, the main methods for producing nitriles are ammoxidation and hydrocyanation. Both routes are green in the sense that they do not generate stoichiometric amounts of salts.Electric Literature of C7H4Br2N2
Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts