A series of some novel imidazolidinone were synthesized by the aminolysis of oxazolones with amines, obtained by the condensation of aromatic aldehydes with benzoyl glycine in the presence of acetic anhydride and anhydrous sodium acetate. The so formed oxazolones were condensed with 2, 4-dinitrophenylhydrazine in dry pyridine to obtain a series of (Z)-N-(4-benzylidene-1-((2, 4-dinitrophenyl) amino)-2-phenyl-1H-imidazol-5(4H) one (3a-g). The compounds synthesized were identified and characterized by TLC, IR, ¹H NMR and MS spectroscopy and screened for anthelmintic activity. All the compounds showed significant dose dependant anthelmintic activity. Among them compound 3g showed most potent activity. Compounds 3b, 3d, 3f demonstrated paralysis as well as death of worms at a time as that of albendazole.