The author of 《Diimidazo[4,5-b:4′,5′-e]pyridine: synthesis and nucleophilic aromatic substitution reaction》 were Razorenov, Dmitriy Yu.; Makulova, Sophia A.; Fedyanin, Ivan V.; Lyssenko, Konstantin A.; Skupov, Kirill M.; Volkova, Yulia A.; Ponomarev, Ivan I.; Ponomarev, Igor I.. And the article was published in Mendeleev Communications in 2019. Synthetic Route of C5H7N3 The author mentioned the following in the article:
The compound 1,7-dihydrodiimidazo[4,5-b:4′,5′-e]pyridine obtained by reductive heterocyclization was N-arylated with 4-fluoronitrobenzene to form two regioisomers I and II in 7 : 3 ratio. This N-arylation is considered as a model reaction for the polymer synthesis. The results came from multiple reactions, including the reaction of 2,6-Diaminopyridine(cas: 141-86-6Synthetic Route of C5H7N3)
2,6-Diaminopyridine(cas: 141-86-6) belongs to pyridine. Pyridine and its simple derivatives are stable and relatively unreactive liquids, with strong penetrating odours that are unpleasant.Synthetic Route of C5H7N3