Synthesis of new 2‐ferrocenyl‐5‐fluoro‐6‐(4‐substituted‐1‐piperazinyl)‐1H‐benzimidazoles of potential biological interest

New substituted 2-ferrocenylbenzimidazole derivatives are prepared by the oxidation of corresponding Schiff's bases in situ, generated from corresponding 1,2-diamino-4-fluoro-5-(1-piperazinyl)benzenes and 2-ferrocenecarboxaldehyde using nitrobenzene.