Structure-activity relationships of 4-position diamine quinoline methanols as intermittent preventative treatment (IPT) against Plasmodium falciparum

J Med Chem. 2011 Sep 22;54(18):6277-85. doi: 10.1021/jm200647u. Epub 2011 Aug 22.

Abstract

A library of diamine quinoline methanols were designed based on the mefloquine scaffold. The systematic variation of the 4-position amino alcohol side chain led to analogues that maintained potency while reducing accumulation in the central nervous system (CNS). Although the mechanism of action remains elusive, these data indicate that the 4-position side chain is critical for activity and that potency (as measured by IC(90)) does not correlate with accumulation in the CNS. A new lead compound, (S)-1-(2,8-bis(trifluoromethyl)quinolin-4-yl)-2-(2-(cyclopropylamino)ethylamino)ethanol (WR621308), was identified with single dose efficacy and substantially lower permeability across MDCK cell monolayers than mefloquine. This compound could be appropriate for intermittent preventative treatment (IPTx) indications or other malaria treatments currently approved for mefloquine.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Animals
  • Antimalarials / chemical synthesis*
  • Antimalarials / pharmacology
  • Cell Line
  • Cell Membrane Permeability
  • Dimerization
  • Dogs
  • Drug Resistance
  • Ethanolamines / chemical synthesis*
  • Ethanolamines / pharmacology
  • Ethylenediamines / chemical synthesis
  • Ethylenediamines / pharmacology
  • Malaria / prevention & control*
  • Mefloquine / analogs & derivatives
  • Mefloquine / chemical synthesis
  • Mefloquine / pharmacology
  • Methanol / analogs & derivatives*
  • Methanol / chemical synthesis*
  • Methanol / pharmacology
  • Mice
  • Plasmodium berghei
  • Plasmodium falciparum / drug effects*
  • Quinolines / chemical synthesis*
  • Quinolines / pharmacology
  • Stereoisomerism
  • Structure-Activity Relationship

Substances

  • 1-(2,8-bis(trifluoromethyl)quinolin-4-yl)-2-(2-(cyclopropylamino)ethylamino)ethanol
  • Antimalarials
  • Ethanolamines
  • Ethylenediamines
  • Quinolines
  • Mefloquine
  • Methanol