Discovery of 4-piperazinyl-2-aminopyrimidine derivatives as dual inhibitors of JAK2 and FLT3

Eur J Med Chem. 2019 Nov 1:181:111590. doi: 10.1016/j.ejmech.2019.111590. Epub 2019 Aug 7.

Abstract

Hybridization strategy is an effective strategy to obtain multi-target inhibitors in drug design. In this study, we assembled the pharmacophores of momelotinib and tandutinib to get a series of 4-piperazinyl-2-aminopyrimidine derivatives. All compounds were tested for the inhibition of JAK2 and FLT3 enzymes, of which, compounds with potent enzyme activities were assayed for antiproliferative activities against three cancer cell lines (HEL, MV4-11, and HL60). The structure-activity relationship studies were conducted through variations in two regions, the "A" phenyl ring and "B" phenyl ring. Compound 14j showed the most balanced in vitro inhibitory activity against JAK2 and FLT3 (JAK2 IC50 = 27 nM, FLT3 IC50 = 30 nM), and it also showed potent inhibition against the above tested cell lines. In the cellular context, 14j strongly induced apoptosis by arresting cell cycle in the G1/S phase, and was selected as a promising JAK2/FLT3 dual inhibitor.

Keywords: 4-Piperazinyl-2-aminopyrimidine derivatives; Dual inhibitor; Hybridization strategy.

MeSH terms

  • Apoptosis / drug effects
  • Cell Line, Tumor
  • Cell Proliferation / drug effects
  • Drug Design
  • Humans
  • Janus Kinase 2 / antagonists & inhibitors*
  • Janus Kinase 2 / metabolism
  • Molecular Docking Simulation
  • Neoplasms / drug therapy
  • Piperazines / chemistry
  • Piperazines / pharmacology
  • Protein Kinase Inhibitors / chemistry*
  • Protein Kinase Inhibitors / pharmacology*
  • Pyrimidines / chemistry*
  • Pyrimidines / pharmacology*
  • fms-Like Tyrosine Kinase 3 / antagonists & inhibitors*
  • fms-Like Tyrosine Kinase 3 / metabolism

Substances

  • Piperazines
  • Protein Kinase Inhibitors
  • Pyrimidines
  • 2-aminopyrimidine
  • FLT3 protein, human
  • fms-Like Tyrosine Kinase 3
  • JAK2 protein, human
  • Janus Kinase 2