title: Ring-substituted 11-oxo-11H-indeno[1,2-b]quinoline-6-carboxamides with similar patterns of cytotoxicity to the dual topo I/II inhibitor DACA.
abstract: A series of ring-substituted analogues of the topoisomerase inhibitor 11-oxo-11H-indeno[1,2-b]quinoline-6-carboxamides was prepared and evaluated. The compounds were prepared by Pfitzinger reaction of the appropriate isatin-7-carboxylic acids and 1-indanones, followed by selective thermal decarboxylation of the resulting tetracyclic diacids, subsequent oxidation of the methylene group with alkaline permanganate under carefully controlled conditions, and 1,1'-carbonyldiimidazole-induced amidation. The compounds were evaluated in a panel of cell lines in culture. The largest increases in cytotoxicity (five to tenfold) were shown by 4-substituted analogues, with the 4-Cl derivative having an IC50 of 8 nM against the Lewis lung carcinoma.
authors.affiliation: School of Chemistry, La Trobe University, Bundoora, Victoria, Australia. ldeady@latrobe.edu.au
authors.forename: L W
authors.initials: LW
authors.lastname: Deady
authors.forename: J
authors.initials: J
authors.lastname: Desneves
authors.forename: A J
authors.initials: AJ
authors.lastname: Kaye
authors.forename: M
authors.initials: M
authors.lastname: Thompson
authors.forename: G J
authors.initials: GJ
authors.lastname: Finlay
authors.forename: B C
authors.initials: BC
authors.lastname: Baguley
authors.forename: W A
authors.initials: WA
authors.lastname: Denny
mesh_terms: D000166:Acridines / Q000737:chemistry / Q000494:pharmacology*; D000818:Animals; D000970:Antineoplastic Agents / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology*; D004354:Drug Screening Assays, Antitumor; D004791:Enzyme Inhibitors / Q000737:chemistry / Q000494:pharmacology*; D006801:Humans; D019169:Jurkat Cells; D007941:Leukemia P388 / Q000188:drug therapy; D008175:Lung Neoplasms / Q000188:drug therapy; D009682:Magnetic Resonance Spectroscopy; D051379:Mice; D011804:Quinolines / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology*; D013329:Structure-Activity Relationship; D059004:Topoisomerase I Inhibitors; D059005:Topoisomerase II Inhibitors; D014407:Tumor Cells, Cultured
chemical_list: D000166:Acridines; D000970:Antineoplastic Agents; D004791:Enzyme Inhibitors; D011804:Quinolines; D059004:Topoisomerase I Inhibitors; D059005:Topoisomerase II Inhibitors; C058332:N-(2'-(dimethylamino)ethyl)acridine-4-carboxamide