title: Synthesis of thieno[2,3-b]azepin-4-ones as potential antineoplastic agents.
abstract: In view of the antitumor activity reported for 7,8-dimethylbenzo[b]azepine-2,5-dione, new isosteric thieno[2,3-b]-azepin-4-ones have been prepared by a Dieckmann ring closure reaction. Substituted 2-amino-3-carbethoxythiophenes were tosylated, or benzoylated, and the corresponding sodium salt was alkylated with ethyl 4-bromobutyrate. The resulting product was cyclized in the presence of sodium hydride, and the azepinones were detosylated with 40% sulfuric acid-acetic acid solution. Preliminary biological data do not indicate any siginificant antineoplastic activity.
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000138:chemical synthesis* / Q000627:therapeutic use; D001381:Azepines / Q000138:chemical synthesis* / Q000627:therapeutic use; D007939:Leukemia L1210 / Q000188:drug therapy; D008223:Lymphoma / Q000188:drug therapy; D008545:Melanoma / Q000188:drug therapy; D051379:Mice; D009374:Neoplasms, Experimental / Q000188:drug therapy; D013876:Thiophenes / Q000138:chemical synthesis / Q000627:therapeutic use
chemical_list: D000970:Antineoplastic Agents; D001381:Azepines; D013876:Thiophenes