SAR study of bicyclo[4.1.0]heptanes as melanin-concentrating hormone receptor R1 antagonists: Taming hERG
摘要:
To improve the ex vivo potency of MCH inhibitor la and to address its hERG liability, a structure-activity study was carried out, focusing on three regions of the lead structure. Introduction of new side chains with basic nitrogen improved in vitro and ex vivo bindings. Many potent compounds with K-i < 10 nM were discovered (compounds 6a-j) and several Compounds (14-17) had excellent ex vivo binding at 6 h and 24 h. Attenuating the basicity of nitrogen on the side chain, and in particular, introduction of a polar group such as aminomethyl on the distal phenyl ring significantly lowered the hERG activity. Further replacement of the distal phenyl group with heteroaryl groups in the cyclohexene series provided compounds such as 281 with excellent ex vivo activity with much reduced hERG liability. (c) 2007 Elsevier Ltd. All rights reserved.
Discovery of Highly Selective Inhibitors of the Human Constitutive Proteasome β5c Chymotryptic Subunit
作者:Wenhu Zhan、Daqiang Li、Priya Saha、Rong Wang、Hao Zhang、Amrendra K. Ajay、Christa Deban、George Sukenick、Jamil Azzi、Gang Lin
DOI:10.1021/acs.jmedchem.2c00733
日期:2023.1.26
We describe our discovery and development of potent and highly selectiveinhibitors of human constitutive proteasome chymotryptic activity (β5c). Structure–activity relationship studies of the novel class of inhibitors focused on optimization of N-cap, C-cap, and side chain of the chemophore asparagine. Compound 32 is the most potent and selective β5c inhibitor in this study. A docking study provides