Synthesis and evaluation of novel 2,4-diaminopyrimidines bearing a sulfoxide moiety as anaplastic lymphoma kinase (ALK) inhibition agents

Bioorg Med Chem Lett. 2021 Sep 15;48:128253. doi: 10.1016/j.bmcl.2021.128253. Epub 2021 Jul 8.


Anaplastic lymphoma kinase (ALK) targeted therapies have demonstrated remarkable efficacy in ALK-positive lung adenocarcinomas. Here we synthesized and evaluated sixteen new 2,4-diaminopyrimidines bearing a sulfoxide moiety as anaplastic lymphoma kinase (ALK) inhibitors. The optimal compound 9e exhibited excellent antiproliferative activity against non-small cell lung cancer NCI-H2228 cells, which is better than that of Brigatinib and similar to Ceritinib. Mechanism study revealed that the optimal compound 9e decreased the mitochondrial membrane potential and arrested NCI-H2228 cells in the G0/G1 phase, finally resulting in cellular apoptosis. It is interesting that 9e could effectively inhibit the migration of NCI-H2228 cells and may be a promising leading compound for chemotherapy of metastatic cancer.

Keywords: Anaplastic lymphoma kinase inhibitors; Antiproliferative activity; Mechanism; Sulfoxide.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Anaplastic Lymphoma Kinase / antagonists & inhibitors*
  • Anaplastic Lymphoma Kinase / metabolism
  • Antineoplastic Agents / chemical synthesis
  • Antineoplastic Agents / chemistry
  • Antineoplastic Agents / pharmacology*
  • Cell Cycle Checkpoints / drug effects
  • Cell Line, Tumor
  • Cell Proliferation / drug effects
  • Dose-Response Relationship, Drug
  • Drug Screening Assays, Antitumor
  • Humans
  • Membrane Potential, Mitochondrial / drug effects
  • Molecular Structure
  • Protein Kinase Inhibitors / chemical synthesis
  • Protein Kinase Inhibitors / chemistry
  • Protein Kinase Inhibitors / pharmacology*
  • Pyrimidines / chemical synthesis
  • Pyrimidines / chemistry
  • Pyrimidines / pharmacology*
  • Safrole / analogs & derivatives*
  • Safrole / chemistry
  • Safrole / pharmacology
  • Structure-Activity Relationship


  • Antineoplastic Agents
  • Protein Kinase Inhibitors
  • Pyrimidines
  • 2,4-diaminopyrimidine
  • ALK protein, human
  • Anaplastic Lymphoma Kinase
  • Safrole
  • sulfoxide