Design, synthesis, and biological evaluation of 3-(1H-1,2,3-triazol-1-yl)benzamide derivatives as Potent Pan Bcr-Abl inhibitors including the threonine(315)→isoleucine(315) mutant

J Med Chem. 2012 Nov 26;55(22):10033-46. doi: 10.1021/jm301188x. Epub 2012 Nov 1.

Abstract

A series of 3-(1H-1,2,3-triazol-1-yl)benzamide derivatives were designed and synthesized as new Bcr-Abl inhibitors by using combinational strategies of bioisosteric replacement, scaffold hopping, and conformational constraint. The compounds displayed significant inhibition against a broad spectrum of Bcr-Abl mutants including the gatekeeper T315I and p-loop mutations, which are associated with disease progression in CML. The most potent compounds 6q and 6qo strongly inhibited the kinase activities of Bcr-Abl(WT) and Bcr-Abl(T315I) with IC(50) values of 0.60, 0.36 and 1.12, 0.98 nM, respectively. They also potently suppressed the proliferation of K562, KU812 human CML cells, and a panel of murine Ba/F3 cells ectopically expressing either Bcr-Abl(WT) or any of a panel of other Bcr-Abl mutants that have been shown to contribute to clinical acquired resistance, including Bcr-Abl(T315I), with IC(50) values in low nanomolar ranges. These compounds may serve as lead compounds for further development of new Bcr-Abl inhibitors capable of overcoming clinical acquired resistance against imatinib.

Publication types

  • Evaluation Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Benzamides / chemistry
  • Benzamides / pharmacology*
  • Blotting, Western
  • Cell Line, Tumor
  • Cell Proliferation / drug effects
  • Cells, Cultured
  • Drug Design*
  • Drug Resistance, Neoplasm / drug effects
  • Fusion Proteins, bcr-abl / antagonists & inhibitors*
  • Fusion Proteins, bcr-abl / genetics
  • Humans
  • Imatinib Mesylate
  • Isoleucine / genetics*
  • Leukemia, Myelogenous, Chronic, BCR-ABL Positive / drug therapy*
  • Leukemia, Myelogenous, Chronic, BCR-ABL Positive / genetics
  • Leukemia, Myelogenous, Chronic, BCR-ABL Positive / pathology
  • Models, Molecular
  • Molecular Structure
  • Mutation / genetics*
  • Phosphorylation
  • Piperazines / therapeutic use
  • Protein Kinase Inhibitors / therapeutic use
  • Pyrimidines / therapeutic use
  • Structure-Activity Relationship
  • Threonine / genetics*

Substances

  • Benzamides
  • Piperazines
  • Protein Kinase Inhibitors
  • Pyrimidines
  • Isoleucine
  • Threonine
  • benzamide
  • Imatinib Mesylate
  • Fusion Proteins, bcr-abl