Design,synthesis and structure-activity relationship of 4,5-dihydropyrrolo[3,4-c]pyrazol-6(1H)-ones as potent p53-MDM2 inhibitors |
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Authors: | Wei-Huang Zhou Xi-Guo Xu Jin Li Xiao Min Jian-Zhong Yao Guo-Qiang Dong Chun-Lin Zhuang Zhen-Yuan Miao Wan-Nian Zhang |
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Institution: | a School of Pharmacy, Ningxia Medical University, Yinchuan 750004, China;
b School of Pharmacy, Second Military Medical University, Shanghai 200433, China |
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Abstract: | In the past decade, the p53-MDM2 protein-protein interaction by small molecules has been confirmed as a successful strategy for cancer therapy. In our previous work, pyrrolo3,4-c]pyrazol-6(1H)-ones were found to be potent p53-MDM2 inhibitors. Further optimization and structure-activity relationship studies were described in the present work. The result revealed that benzyl group on position N1 of imidazole and bromine on C4-phenyl of pyrrolidone showed higher inhibitory activities. In vitro antiproliferative assay demonstrated the potent p53-MDM2 inhibitor 5c with 4-fold selectivity for U2 OS and Saos-2 cells. These data indicated that 4,5-dihydropyrrolo3,4-c]pyrazol-6(1H)-one moiety is a valuable scaffold for further development of p53-MDM2 inhibitors. |
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Keywords: | p53-MDM2 Protein-protein interaction Inhibitors Drug design Structure-activity relationships Antiproliferative |
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