Design and synthesis of novel 2-methyl-4,5-substitutedbenzo[f]-3,3a,4,5-tetrahydro-pyrazolo[1,5-d][1,4]oxazepin-8(7H)-one derivatives as telomerase inhibitors
作者:Xin-Hua Liu、Ying-Ming Jia、Bao-An Song、Zhi-xiang Pang、Song Yang
DOI:10.1016/j.bmcl.2012.11.101
日期:2013.2
Eight novel 4,5-tetrahydropyrazolo[1,5-d][1,4] oxazepine derivatives have been synthesized and purified to be screened for anticancer activity. By a modified TRAP assay, some titled compounds were tested against telomerase, and compound 4a showed the most potent inhibitory activity with IC50 value at 0.78 +/- 0.22 mu M. Western blot assays showed that compounds 4a and 4b could inhibit expression of Cyclin D1, TERT, phospho-AKT and PI3K/AKT pathway. (c) 2012 Elsevier Ltd. All rights reserved.
Design and synthesis of novel 2-pyrazoline-1-ethanone derivatives as selective MAO inhibitors
作者:Xu Tong、Rui Chen、Tong-Tian Zhang、Yan Han、Wen-Jian Tang、Xin-Hua Liu
DOI:10.1016/j.bmc.2014.12.010
日期:2015.2
Thirty seven novel 2-pyrazoline-1-ethanone derivatives were designed, synthesized and evaluated as selective hMAO inhibitors. Among them, compounds 7h (IC50 = 2.40 mu M) and 12c (IC50 = 2.00 mu M) exhibited best inhibitory activity and selectivity against hMAO-A, surpassing that of the positive control Clorgyline (IC50 = 2.76 mu M). Based on selective activity of hMAO-A, SAR analysis showed that the order of N1 substituent contribution was bromo (3) > piperidinyl (4) > morpholinyl (5) > imidazolyl (6), and compounds with electron-withdrawing substituents (-F, -Cl) at C3 or C5 phenyl ring of 2-pyrazoline nucleus dedicated stronger MAO-A inhibitory activity. Molecular docking showed that compounds 7h and 12c were nicely bound to hMAO-A via two hydrogen bonds (SER209, GLU216), one Pi-Pi interaction and three hydrogen bonds (SER209, GLU216, TYR69), one Sigma-Pi interaction, respectively. In addition, the substituent at C3 position of 2-pyrazoline with the N1 acetyl has little effect on MAO-A inhibitory activity. These data support further studies to assess rational design of more efficiently selective hMAO inhibitors in the future. (C) 2014 Elsevier Ltd. All rights reserved.