The identification of 8,9-dimethoxy-5-(2-aminoalkoxy-pyridin-3-yl)-benzo[c][2,7]naphthyridin-4-ylamines as potent inhibitors of 3-phosphoinositide-dependent kinase-1 (PDK-1)

Eur J Med Chem. 2010 Apr;45(4):1379-86. doi: 10.1016/j.ejmech.2009.12.036. Epub 2009 Dec 28.


A series of 8,9-dimethoxy-5-(2-aminoalkoxy-pyridin-3-yl)-benzo[c][2,7]naphthyridin-4-ylamine-based inhibitors of 3-phosphoinositide-dependent kinase-1 (PDK-1) has been identified. Several examples appear to be potent and relatively selective inhibitors of PDK-1 over the related AGC kinases PKA, PKB/AKT, and p70S6K. The introduction of a stereochemical center beside the amino substituent on the aminoalkoxy-side chain had little effect upon the inhibitory activity against these enzymes, and X-ray crystallographic analyses of a representative pair of enantiomeric inhibitors bound to the active site of PDK-1 revealed comparable binding modes for each enantiomer.

MeSH terms

  • 3-Phosphoinositide-Dependent Protein Kinases
  • Crystallography, X-Ray
  • Hydrogen Bonding
  • Models, Molecular
  • Molecular Structure
  • Protein Kinase Inhibitors / chemistry
  • Protein Kinase Inhibitors / pharmacology*
  • Protein-Serine-Threonine Kinases / antagonists & inhibitors*
  • Pyridines / chemistry
  • Pyridines / pharmacology*
  • Static Electricity
  • Structure-Activity Relationship


  • Protein Kinase Inhibitors
  • Pyridines
  • 3-Phosphoinositide-Dependent Protein Kinases
  • Protein-Serine-Threonine Kinases