《The synthesis of a hexameric expanded hemiporphyrazine》 was written by Schrage, Briana R.; Chanawanno, Kullapa; Crandall, Laura A.; Ziegler, Christopher J.. Computed Properties of C5H7N3 And the article was included in Journal of Porphyrins and Phthalocyanines in 2020. The article conveys some information:
In this report the synthesis and characterization of a new hexameric expanded hemiporphyrazine which refer to as hexahemiporphyrazine were presented. The synthesis incorporated bis(6-amino-2-pyridyl)amine as a starting material, which could be produced from 2,6-diaminopyridine using melt reaction conditions. Bis(6-amino-2-pyridyl)amine can adopt three different conformations, two of which are observed in the free base and protonated form, and the third in the backbone of hexahemiporphyrazine. Reaction of bis(6-amino-2-pyridyl)amine and diiminoisoindoline in the presence of a catalytic amount of BF3 produces the hexihemiporphyrazine macrocycle, which was characterized spectroscopically and by X-ray crystallog. Structure elucidation reveals two inverted pyridine rings in a configuration reminiscent of that seen in hexaphyrin, however hexahemiporphyrazine lacks cross conjugation across the macrocycle. After reading the article, we found that the author used 2,6-Diaminopyridine(cas: 141-86-6Computed Properties 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.Computed Properties of C5H7N3