反应详情

Free base of the titled compound was prepared from N-(2-pyridyl)-o-phenylenediamine and (E)-3-Chlorocinnamoyl chloride (Amino, Y.; Kawada, K.; Toi, K.; Kumashiro, I.; Fukushima, K. Chem. Pharm. Bull, 1988, 36, 4426) according to the preparation of (E)-1-(2-pyridyl)-2-styryl-H-benzimidazole (Example 1, method A). The free base was dissolved with a 10% methanol solution of hydrogen chloride (5 ml). Concentration and recrystallization from ethyl acetate/ethanol yielded the titled compound. MW: 368.27; mp:>230° C.; 1H-NMR (DMSO) δ: 8.85-8.81 (1H, m), 8.31-8.22 (1H, m), 8.20 (1H, d, J=16.1 Hz), 7.90-7.81 (3H, m), 7.78-7.72 (1H, m), 7.68-7.43 (6H, m), 7.33 (1H, d, J=16.1 Hz).

1. concentrationConcentration and recrystallization from ethyl acetate/ethanol