Abstract
The broader and systematic application of a novel scaffold is often hampered by the unavailability of a short and reliable synthetic access. We investigated a new strategy for the design and synthesis of an array of N2-substituted aza-2H-indazole derivatives as potential kinase inhibitors. Guided by a rational ligand alignment approach to qualify the so-far underrepresented aza-2H-indazole scaffold, indazoles were connected at the N2 position with a phenyl spacer and an arylsulfonamide or amide linkage. Initial profiling against a panel of 30 kinases confirmed the in silico predicted selectivity bias. A synthesized focused library of 52 different aza-2H-indazole derivatives showed good initial selective inhibition against SGK1, Tie2, and SRC kinases, with the best representatives having IC50 values in the range of 500 nm. In a comparative computational study, these data were analyzed and rationalized in light of docking studies.
Keywords:
docking; drug design; focused library; kinase inhibition; nitrogen heterocycles; scaffolds.
© 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.
Publication types
-
Research Support, Non-U.S. Gov't
MeSH terms
-
Drug Design
-
Enzyme Assays
-
Humans
-
Hydrogen Bonding
-
Immediate-Early Proteins / antagonists & inhibitors*
-
Immediate-Early Proteins / metabolism
-
Indazoles / chemical synthesis
-
Indazoles / chemistry*
-
Indazoles / metabolism
-
Molecular Docking Simulation
-
Molecular Structure
-
Protein Binding
-
Protein Kinase Inhibitors / chemical synthesis
-
Protein Kinase Inhibitors / chemistry*
-
Protein Kinase Inhibitors / metabolism
-
Protein Serine-Threonine Kinases / antagonists & inhibitors*
-
Protein Serine-Threonine Kinases / metabolism
-
Receptor, TIE-2 / antagonists & inhibitors*
-
Receptor, TIE-2 / metabolism
-
Small Molecule Libraries / chemical synthesis
-
Small Molecule Libraries / chemistry*
-
Small Molecule Libraries / metabolism
-
Structure-Activity Relationship
-
src-Family Kinases / antagonists & inhibitors*
-
src-Family Kinases / metabolism
Substances
-
Immediate-Early Proteins
-
Indazoles
-
Protein Kinase Inhibitors
-
Small Molecule Libraries
-
Receptor, TIE-2
-
TEK protein, human
-
src-Family Kinases
-
Protein Serine-Threonine Kinases
-
serum-glucocorticoid regulated kinase