Non-hinge-binding pyrazolo[1,5-a]pyrimidines as potent B-Raf kinase inhibitors

Bioorg Med Chem Lett. 2009 Dec 1;19(23):6519-23. doi: 10.1016/j.bmcl.2009.10.049. Epub 2009 Oct 26.

Abstract

As part of our research effort to discover B-Raf kinase inhibitors, we prepared a series of C-3 substituted N-(3-(pyrazolo[1,5-a]pyrimidin-7-yl)phenyl)-3-(trifluoromethyl)benzamides. X-ray crystallography studies revealed that one of the more potent inhibitors (10n) bound to B-Raf kinase without forming a hinge-binding hydrogen bond. With basic amine residues appended to C-3 aryl residues, cellular activity and solubility were enhanced over previously described compounds of this class.

MeSH terms

  • Benzamides / chemical synthesis
  • Benzamides / chemistry
  • Benzamides / pharmacology*
  • Crystallography, X-Ray
  • Models, Molecular
  • Molecular Structure
  • Protein Kinase Inhibitors / chemical synthesis
  • Protein Kinase Inhibitors / chemistry*
  • Protein Kinase Inhibitors / pharmacology*
  • Proto-Oncogene Proteins B-raf / antagonists & inhibitors*
  • Proto-Oncogene Proteins B-raf / metabolism
  • Pyrazoles / chemical synthesis
  • Pyrazoles / chemistry
  • Pyrazoles / pharmacology*
  • Pyrimidines / chemical synthesis
  • Pyrimidines / chemistry
  • Pyrimidines / pharmacology*
  • Stereoisomerism
  • Structure-Activity Relationship

Substances

  • Benzamides
  • Protein Kinase Inhibitors
  • Pyrazoles
  • Pyrimidines
  • Proto-Oncogene Proteins B-raf