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  3. Design, Synthesis, and Biological Evaluation of Macrocyclic 2-Amino-4-phenylaminopyrimidine Derivatives as Potent JAK2 Inhibitors

Design, Synthesis, and Biological Evaluation of Macrocyclic 2-Amino-4-phenylaminopyrimidine Derivatives as Potent JAK2 Inhibitors

  • J Med Chem. 2025 Jul 10;68(13):13822-13835. doi: 10.1021/acs.jmedchem.5c00683.
Wenyi Mei 1,  Xiaotong Jia 2,  Feng Hu 2,  Wenjie Liao 2,  Ziqi Chen 2,  Hongjie Bi 2,  Zhenjiang Zhao 2,  Zhuo Chen 2,  Honglin Li 1 2 3,  Lili Zhu 2,  Yanyan Diao 1
Affiliations

Affiliations

  • 1 Innovation Center for AI and Drug Discovery, School of Pharmacy, East China Normal University, Shanghai 200062, China.
  • 2 Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China.
  • 3 Lingang Laboratory, Shanghai 200031, China.
PMID: 40569101 DOI: 10.1021/acs.jmedchem.5c00683
Abstract

Janus kinase 2 with the activating mutation V617F is a potential target for the treatment of myeloproliferative neoplasms. Current JAK2 inhibitors often suffer from multiple pharmacological limitations such as limited selectivity and rapid metabolic clearance. In this study, we describe the design, synthesis, and biological evaluation of a series of macrocyclic 2-amino-4-phenylaminopyrimidine derivatives as JAK2 inhibitors. Among them, compound 11 showed potent inhibitory activity against JAK2 kinase (IC50 = 54.70 nM), as well as JAK2-dependent HEL and SET-2 cells, with IC50 values of 0.57 μM and 1.07 μM, respectively. Besides, compound 11 downregulated the expression of p-STAT3 and p-STAT5 in HEL cells. Importantly, compound 11 also exhibited good bioavailability (F = 54.8%) and potent inhibition of rhEPO-induced extramedullary erythropoiesis and polycythemia vera in vivo. In summary, the macrocyclic design introduces structural innovation and provides a more efficient and selective strategy for JAK2 inhibition.

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