Polybenzimidazoles based on methylated benzene tetraamines was written by Korshak, V. V.;Teplyakov, M. M.;Fedorova, R. D.. And the article was included in Vysokomolekulyarnye Soedineniya, Seriya B: Kratkie Soobshcheniya in 1967.Product Details of 4887-83-6 This article mentions the following:
3,3′-Diaminotolidine (I) and 2,3′,4,4′-tetraaminoditolylmethane (II) were synthesized and were used to prepare polybenzimidazoles with di-Ph isophthalate (III), di-Ph terephthalate (IV), di-Ph adipate (V), and di-Ph sebacate (VI). The polybenzimidazoles obtained had the following properties (amine, ester, intrinsic viscosity in HCO2H, and decomposition temperature given): I, V, 0.76, -; I, VI, 0.80, -; I, III, 0.40, 490°; I, IV, 0.42, 500°; II, III-IV, 0.51, 490°; II, III, 0.64, -; II, III, 0.47, 400°; II, IV, 0.41, 450°. In the experiment, the researchers used many compounds, for example, 7-Methyl-1H-benzo[d]imidazole (cas: 4887-83-6Product Details of 4887-83-6).
7-Methyl-1H-benzo[d]imidazole (cas: 4887-83-6) belongs to imidazole derivatives. Many natural products, especially alkaloids, contain the imidazole ring. These imidazoles share the 1,3-C3N2 ring but feature varied substituents. Imidazole is incorporated into many important biological compounds. The most pervasive is the amino acid histidine, which has an imidazole side-chain. Histidine is present in many proteins and enzymes, e.g. by binding metal cofactors, as seen in hemoglobin.Product Details of 4887-83-6
Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem