Abstract The substituted biphenyls 8–13, 5 (6)-phenyl-2-substituted benzimidazoles 7, 14– 18, 9-phenylbenzimidazo [1, 2-c] quinazolin-6-one and-thione 20 as well as the 1-aroyl-2- mercapto-5-phenylbenzimidazoles 21, 24, 25 have been synthesized. Their anthelminthic
