775288-71-6Relevant articles and documents
Synthesis and biological evaluation of 6-(pyrimidin-4-yl)-1H-pyrazolo[4,3-b]pyridine derivatives as novel dual FLT3/CDK4 inhibitors
Chen, Lijuan,Chen, Yong,Deng, Dexin,Fu, Suhong,Guo, Yong,Hu, Mengshi,Li, Xiandeng,Liu, Kongjun,Peng, Bin,Si, Wenting,Tan, Yan,Tang, Minghai,Wang, Huan,Yang, Tao,Yang, Yingxue,Yang, Zhuang,Zhang, Chufeng
, (2022/02/17)
FMS-like tyrosine kinase-3 (FLT3) and cyclin-dependent kinase 4/6 (CDK4/6) inhibitors have been proven to play a significant role in tumor therapy. Herein, based on the previously reported JAK2/FLT3 inhibitor 18e, we described the synthesis, structure–activity relationship and biological evaluation of a series of unique 6-(pyrimidin-4-yl)-1H-pyrazolo[4,3-b]pyridine derivatives that inhibited FLT3 and CDK4 kinases. The optimized compound 23k exhibited low nanomolar range activities with IC50 values of 11 and 7 nM for FLT3 and CDK4, respectively. In the MV4-11 xenograft tumor model, the tumor growth inhibition rate of 23k dosed at 200 mg/kg was 67%, suggesting that 23k possessed an antitumor therapeutic effect.
PREPARATION METHOD OF RIBOCICLIB AND ITS SALT AND CRYSTALLINE FORM THEREOF
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Paragraph 0033-0034, (2021/02/20)
The present invention provides a preparation method of ribociclib and its salt and a novel crystalline form of ribociclib succinate. The conditions of the preparation method of the present invention are easier than the conventional process, and the yield is higher as well. The purity of ribociclib in crude product stage meets the requirement for quality of active pharmaceutical ingredient (API), so that no further purification is required. The crystalline form of ribociclib succinate in the present invention has outstanding storage stability.
Discovery and SARs of 5-Chloro- N4-phenyl- N2-(pyridin-2-yl)pyrimidine-2,4-diamine Derivatives as Oral Available and Dual CDK 6 and 9 Inhibitors with Potent Antitumor Activity
Wang, Yang,Chen, Xing,Yan, Yaoyao,Zhu, Xiaochen,Liu, Mingming,Liu, Xinhua
, p. 3327 - 3347 (2020/04/08)
Cyclin-dependent kinases (CDKs) are promising therapeutic targets for cancer therapy. Herein, we describe our efforts toward the discovery of a series of 5-chloro-N4-phenyl-N2-(pyridin-2-yl)pyrimidine-2,4-diamine derivatives as dual CDK6 and 9 inhibitors. Intensive structural modifications lead to the identification of compound 66 as the most active dual CDK6/9 inhibitor with balancing potency against these two targets and good selectivity over CDK2. Further biological studies revealed that compound 66 was directly bound to CDK6/9, resulting in suppression of their downstream signaling pathway and inhibition of cell proliferation by blocking cell cycle progression and inducing cellular apoptosis. More importantly, compound 66 significantly inhibited tumor growth in a xenograft mouse model with no obvious toxicity, indicating the promising therapeutic potential of CDK6/9 dual inhibitors for cancer treatment. Therefore, the above results are of great importance in the development of dual CDK6/9 inhibitors for cancer therapy.
