Design, synthesis, and biological evaluation of cytotoxic 11-aminoalkenylindenoisoquinoline and 11-diaminoalkenylindenoisoquinoline topoisomerase I inhibitors

Xiangshu Xiao, Smitha Antony, Glenda Kohlhagen, Yves Pommier, Mark Cushman

Research output: Contribution to journalArticle

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The cytotoxic indenoisoquinolines are a novel class of noncamptothecin topoisomerase I inhibitors having certain features that compare favorably with the camptothecins. A new strategy was adopted to attach aminoalkenyl substituents at C-11 of the indenoisoquinoline ring system, which, according to molecular modeling, would orient the side chains toward the DNA minor groove. All of the newly synthesized compounds were more cytotoxic than the parent indenoisoquinoline NSC 314622. Despite an imperfect correlation between cytotoxicities and topoisomerase I inhibition results, the hypothetical structural model of the cleavage complex presented here provides a conceptual framework to explain the structure-activity relationships.

Original languageEnglish (US)
Pages (from-to)5147-5160
Number of pages14
JournalBioorganic and Medicinal Chemistry
Issue number19
StatePublished - Oct 1 2004



  • Anticancer
  • Indenoisoquinoline
  • McMurry coupling
  • Topoisomerase I

ASJC Scopus subject areas

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

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