Total and semisynthesis and in vitro studies of both enantiomers of 20-fluorocamptothecin

Raghuram S. Tangirala, Rachel Dixon, Danzhou Yang, Attila Ambrus, Smitha Antony, Keli Agama, Yves Pommier, Dennis P. Curran

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


Both enantiomers of 20-fluorocamptothecin and the racemate have been prepared by total synthesis. The (R)-enantiomer is essentially inactive in a topoisomerase-I/DNA assay, while the (S)-enantiomer is much less active than (20S)-camptothecin. The lactone ring of 20-fluorocamptothecin hydrolyzes more rapidly than that of camptothecin in PBS. The results provide insight into the role of the 20-hydroxy group in the binding of camptothecin to topoisomerase-I and DNA.

Original languageEnglish (US)
Pages (from-to)4736-4740
Number of pages5
JournalBioorganic and Medicinal Chemistry Letters
Issue number21
StatePublished - Nov 1 2005


  • Camptothecin
  • Isonitrile radical annulation
  • Topoisomerase I

ASJC Scopus subject areas

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


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