2. Academic Validation
  3. Discovery of (R)-5-((5-(1-methyl-1H-pyrazol-4-yl)-4-(methylamino)pyrimidin-2-yl)amino)-3-(piperidin-3-yloxy)picolinonitrile, a novel CHK1 inhibitor for hematologic malignancies

Discovery of (R)-5-((5-(1-methyl-1H-pyrazol-4-yl)-4-(methylamino)pyrimidin-2-yl)amino)-3-(piperidin-3-yloxy)picolinonitrile, a novel CHK1 inhibitor for hematologic malignancies

  • Eur J Med Chem. 2019 Jul 1;173:44-62. doi: 10.1016/j.ejmech.2019.03.062.
Lexian Tong 1,  Pinrao Song 2,  Kailong Jiang 3,  Lei Xu 4,  Tingting Jin 1,  Peipei Wang 3,  Xiaobei Hu 3,  Sui Fang 5,  Anhui Gao 3,  Yubo Zhou 3,  Tao Liu 6,  Jia Li 7,  Yongzhou Hu 8
Affiliations

Affiliations

  • 1 ZJU-ENS Joint Laboratory of Medicinal Chemistry, Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, PR China.
  • 2 Shanghai Haini Pharmaceutical Co. Ltd., Yangtze River Pharmaceutical Group, Shanghai, 201318, PR China.
  • 3 National Center for Drug Screening, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, PR China; University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing, 100049, PR China.
  • 4 National Center for Drug Screening, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, PR China; University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing, 100049, PR China; ShanghaiTech University, Shanghai, 201210, PR China.
  • 5 University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing, 100049, PR China.
  • 6 ZJU-ENS Joint Laboratory of Medicinal Chemistry, Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, PR China. Electronic address: Lt601@zju.edu.cn.
  • 7 National Center for Drug Screening, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, PR China; University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing, 100049, PR China; ShanghaiTech University, Shanghai, 201210, PR China; Open Studio for Druggability Research of Marine Natural Products, Pilot National Laboratory for Marine Science and Technology (Qingdao), 1 Wenhai Road, Aoshanwei, Jimo, Qingdao, 266237, PR China. Electronic address: jli@simm.ac.cn.
  • 8 ZJU-ENS Joint Laboratory of Medicinal Chemistry, Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, PR China. Electronic address: huyz@zju.edu.cn.
PMID: 30986571 DOI: 10.1016/j.ejmech.2019.03.062
Abstract

Through virtual screening, we identified the lead compound MCL1020, which exhibited modest Chk1 inhibitory activity. Then a series of 5-(pyrimidin-2-ylamino)picolinonitrile derivatives as Chk1 inhibitors were discovered by further rational optimization. One promising molecule, (R)-17, whose potency was one of the best, had an IC50 of 0.4 nM with remarkable selectivity (>4300-fold Chk1 vs. Chk2). Compound (R)-17 effectively inhibited the growth of malignant hematopathy cell lines especially Z-138 (IC50: 0.013 μM) and displayed low affinity for hERG (IC50 > 40 μM). Moreover, (R)-17 significantly suppressed the tumor growth in Z-138 cell inoculated xenograft model (20 mg/kg I.V., TGI = 90.29%) as a single agent with body weight unaffected. Taken together, our data demonstrated compound (R)-17 could be a promising drug candidate for the treatment of hematologic malignancies.

Keywords

CHK1 kinase inhibitor; Hematologic malignancies; Monotherapy; Selectivity.

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