title: Synthesis of furonaphth[1,3]oxazine and furo[1,3]oxazinoquinoline derivatives as precursors for an o-quinonemethide structure and potential antitumor agents.
abstract: The synthesis of dihydro furonaphth[1,3]oxazine derivatives 3 was performed through a Mannich-type condensation between 2-cyano-5-hydroxy-3-methylnaphtho[1,2]furan 2a, 1.5 eq of a primary amine and 3 eq of formaldehyde. Similarly, 2-cyano-5-hydroxy-3-methylfuro[2,3-f]quinoline 2b gave the dihydro furo[1,3]oxazino-quinoline compounds 4. Heating a mixture of the naphthofuran 2a, tert-butylamine and formaldehyde at toluene reflux led to the furonaphthoxazine 3e, which decomposes to afford an o-quinonemethide intermediate 5. The latter was trapped with 1-morpholinopropene to give a dihydro furonaphthopyran derivative 6. All compounds 2, 3, 4 and 6 were assayed for in vitro cytotoxic activity toward L 1210, MDA-MB 231 and PC tumor cells. Among them, furonaphth[1,3]oxazines 3b, 3c, and furo[1,3]oxazinoquinolines 4c, 4d showed significant activity against L 1210 cells, while furoquinoline 2b was the most cytotoxic compound towards all three cell lines.
authors.affiliation: Laboratoire de Chimie Organique, Université Claude Bernard, Lyon, France.
authors.forename: L
authors.initials: L
authors.lastname: Benameur
authors.forename: Z
authors.initials: Z
authors.lastname: Bouaziz
authors.forename: P
authors.initials: P
authors.lastname: Nebois
authors.forename: M H
authors.initials: MH
authors.lastname: Bartoli
authors.forename: M
authors.initials: M
authors.lastname: Boitard
authors.forename: H
authors.initials: H
authors.lastname: Fillion
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000138:chemical synthesis* / Q000494:pharmacology; D004354:Drug Screening Assays, Antitumor; D006801:Humans; D007939:Leukemia L1210 / Q000188:drug therapy; D010078:Oxazines / Q000138:chemical synthesis* / Q000494:pharmacology; D011804:Quinolines / Q000138:chemical synthesis* / Q000494:pharmacology; D014407:Tumor Cells, Cultured
chemical_list: D000970:Antineoplastic Agents; D010078:Oxazines; D011804:Quinolines