Synthesis and topoisomerase I inhibitory properties of luotonin A analogues

Ali Cagir, Brian M. Eisenhauer, Rong Gao, Shannon J. Thomas, Sidney M. Hecht

Research output: Contribution to journalArticlepeer-review

69 Scopus citations


Luotonin A, a naturally occurring pyrroloquinazolinoquinoline alkaloid, has been previously demonstrated to be a topoisomerase I poison. A number of luotonin A derivatives have now been prepared through the condensation of anthranilic acid derivatives and 1,2-dihydropyrrolo[3,4-b]quinoline-3-one in the presence of phosphorus oxychloride. When dichloromethane was used as solvent the reaction proceeded to a single product. In contrast when the reaction was carried out in tetrahydrofuran or in phosphorus oxychloride, an additional isomeric product was obtained. The luotonin A analogues were evaluated for their ability to effect stabilization of the covalent binary complex formed between human topoisomerase I and DNA, and for cytotoxicity toward a yeast strain expressing the human topoisomerase I.

Original languageEnglish (US)
Pages (from-to)6287-6299
Number of pages13
JournalBioorganic and Medicinal Chemistry
Issue number23
StatePublished - Dec 1 2004
Externally publishedYes


  • Camptothecin
  • Luotonin A
  • Structure-activity relationships
  • Topoisomerase I-DNA inhibition

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Medicine
  • Molecular Biology
  • Pharmaceutical Science
  • Drug Discovery
  • Clinical Biochemistry
  • Organic Chemistry


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