title: Quinazolyl benzophenothiazines as potential antiviral agents.
abstract: The reaction of anthranilic acid with excess of benzoylchloride in the presence of pyridine yielded 2-phenyl(3H) 4-oxo-3,1-benzoxazine(I). Interaction of (I) with 2-aminoethanol afforded 2-phenyl-3-hydroxy-ethyl(3H) 4-oxo-quinazoline (II). The condensation of (II) with beta-naphthol in the presence of conc. H2SO4 gave 1-(2'-phenyl-3'-ethyl-4'-oxo-quinazolyl) beta-naphthol (III). The reaction of (III) with primary aromatic amines in the presence of anhydrous zinc-chloride afforded 1-(2'-phenyl-3'-ethyl-4'-oxo-quinazolyl)-beta-naphthyl phenyl amine (IV). When (IV) was heated with sulphur and iodine, 1-(2'-phenyl 3'-ethyl -4'-oxo-quinazolyl)-benzophenothiazine (V) was obtained. All the five synthesised benzophenothiazines were screened for their antiviral activity and two compounds exhibited significant inhibition of virus multiplications.
authors.affiliation: Department of Chemistry, University of Lucknow, India.
authors.forename: V K
authors.initials: VK
authors.lastname: Pandey
authors.forename: D
authors.initials: D
authors.lastname: Misra
authors.forename: M N
authors.initials: MN
authors.lastname: Joshi
authors.forename: K
authors.initials: K
authors.lastname: CHandra
mesh_terms: D000818:Animals; D000998:Antiviral Agents / Q000138:chemical synthesis* / Q000494:pharmacology; D002642:Chick Embryo; D004686:Encephalomyocarditis virus / Q000187:drug effects*; D006367:HeLa Cells; D009522:Newcastle disease virus / Q000187:drug effects*; D010640:Phenothiazines / Q000138:chemical synthesis* / Q000494:pharmacology; D011799:Quinazolines / Q000138:chemical synthesis* / Q000494:pharmacology
chemical_list: D000998:Antiviral Agents; D010640:Phenothiazines; D011799:Quinazolines