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  • Title: Potential antitumor agents. 56. "Minimal" DNA-intercalating ligands as antitumor drugs: phenylquinoline-8-carboxamides.
    Author: Atwell GJ, Bos CD, Baguley BC, Denny WA.
    Journal: J Med Chem; 1988 May; 31(5):1048-52. PubMed ID: 3361574.
    Abstract:
    A series of isomeric phenylquinoline-8-carboxamides have been synthesized and evaluated as antitumor agents. This configuration is close to the minimum chromophore required for intercalative binding, since the binding mode of the compounds is dependent on the presence and position of the phenyl ring. If the ring is appended at the 4- or 5-position, it cannot lie within the DNA-intercalation site, and the compounds do not intercalate as shown by both unwinding and helix extension assays. In contrast, the 2-, 3-, and 6-phenyl isomers (where the phenyl ring lies coplanar with the quinoline and in the intercalation site) bind by intercalation. Only those isomers that intercalate show in vivo antitumor activity, with the 2-phenyl derivative in particular possessing broad-spectrum activity in both leukemia and solid-tumor assays.
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