Identification of (R)-1-(5-tert-butyl-2,3-dihydro-1H-inden-1-yl)-3-(1H-indazol-4-yl)urea (ABT-102) as a potent TRPV1 antagonist for pain management

J Med Chem. 2008 Feb 14;51(3):392-5. doi: 10.1021/jm701007g. Epub 2008 Jan 10.

Abstract

Vanilloid receptor TRPV1 is a cation channel that can be activated by a wide range of noxious stimuli, including capsaicin, acid, and heat. Blockade of TRPV1 activation by selective antagonists is under investigation by several pharmaceutical companies in an effort to identify novel agents for pain management. Here we report that replacement of substituted benzyl groups by an indan rigid moiety in a previously described N-indazole- N'-benzyl urea series led to a number of TRPV1 antagonists with significantly increased in vitro potency and enhanced drug-like properties. Extensive evaluation of pharmacological, pharmacokinetic, and toxicological properties of synthesized analogs resulted in identification of ( R)-7 ( ABT-102). Both the analgesic activity and drug-like properties of ( R)-7 support its advancement into clinical pain trials.

MeSH terms

  • Administration, Oral
  • Analgesics / chemical synthesis*
  • Analgesics / pharmacokinetics
  • Analgesics / pharmacology
  • Animals
  • Biological Availability
  • Dogs
  • Haplorhini
  • Humans
  • In Vitro Techniques
  • Indazoles / chemical synthesis*
  • Indazoles / pharmacokinetics
  • Indazoles / pharmacology
  • Indenes / chemical synthesis*
  • Indenes / pharmacokinetics
  • Indenes / pharmacology
  • Microsomes, Liver / metabolism
  • Pain / drug therapy
  • Pain / etiology
  • Rats
  • Stereoisomerism
  • Structure-Activity Relationship
  • TRPV Cation Channels / antagonists & inhibitors*
  • Urea / analogs & derivatives*
  • Urea / chemical synthesis*
  • Urea / pharmacokinetics
  • Urea / pharmacology

Substances

  • ABT 102
  • Analgesics
  • Indazoles
  • Indenes
  • TRPV Cation Channels
  • TRPV1 protein, human
  • Urea