Spirotetrahydro beta-carbolines (spiroindolones): a new class of potent and orally efficacious compounds for the treatment of malaria

  • J Med Chem. 2010 Jul 22;53(14):5155-64. doi: 10.1021/jm100410f.
Bryan K S Yeung  1 ,  Bin Zou ,  Matthias Rottmann ,  Suresh B Lakshminarayana ,  Shi Hua Ang ,  Seh Yong Leong ,  Jocelyn Tan ,  Josephine Wong ,  Sonja Keller-Maerki ,  Christoph Fischli ,  Anne Goh ,  Esther K Schmitt ,  Philipp Krastel ,  Eric Francotte ,  Kelli Kuhen ,  David Plouffe ,  Kerstin Henson ,  Trixie Wagner ,  Elizabeth A Winzeler ,  Frank Petersen ,  Reto Brun ,  Veronique Dartois ,  Thierry T Diagana ,  Thomas H Keller
Affiliations
  • 1. Novartis Institute for Tropical Diseases, 10 Biopolis Road, no. 05-01 Chromos, Singapore 138670. [email protected]
PMID: 20568778 DOI: 10.1021/jm100410f
Abstract

The antiplasmodial activity of a series of spirotetrahydro beta-carbolines is described. Racemic spiroazepineindole (1) was identified from a phenotypic screen on wild type Plasmodium falciparum with an in vitro IC(50) of 90 nM. Structure-activity relationships for the optimization of 1 to compound 20a (IC(50) = 0.2 nM) including the identification of the active 1R,3S enantiomer and elimination of metabolic liabilities is presented. Improvement of the pharmacokinetic profile of the series translated to exceptional oral efficacy in the P. berghei infected malaria mouse model where full cure was achieved in four of five mice with three daily doses of 30 mg/kg.

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