A new series of the title compounds incorporated into diverse N and O heterocyclic moieties of pharmacoavailability as anti-inflammatory and analgesic agents, were synthesized starting with 6,8-dibromo-2-phenyl-4H-3,1-benzoxazin-4-one (I) by its fusion with p-aminoacetophenone to give the new intermediate compound, 6,8-dibromo-2-phenyl-3-(4-acetylphenyl)-4(3H)-quinazolinone (II). The one pot re...