Optimization of imidazole amide derivatives as cannabinoid-1 receptor antagonists for the treatment of obesity
摘要:
Several imidazole-based cyclohexyl amides were identified as potent CB-1 antagonists, but they exhibited poor oral exposure in rodents. Incorporation of a hydroxyl moiety on the cyclohexyl ring provided a dramatic improvement in oral exposure, together with a ca. 10-fold decrease in potency. Further optimization provided the imidazole 2-hydroxy-cyclohexyl amide 45, which exhibited hCB-1 K-i = 3.7 nM and caused significant appetite suppression and robust, dose-dependent reduction of body weight gain in industry-standard rat models. (c) 2007 Elsevier Ltd. All rights reserved.
Optimization of imidazole amide derivatives as cannabinoid-1 receptor antagonists for the treatment of obesity
摘要:
Several imidazole-based cyclohexyl amides were identified as potent CB-1 antagonists, but they exhibited poor oral exposure in rodents. Incorporation of a hydroxyl moiety on the cyclohexyl ring provided a dramatic improvement in oral exposure, together with a ca. 10-fold decrease in potency. Further optimization provided the imidazole 2-hydroxy-cyclohexyl amide 45, which exhibited hCB-1 K-i = 3.7 nM and caused significant appetite suppression and robust, dose-dependent reduction of body weight gain in industry-standard rat models. (c) 2007 Elsevier Ltd. All rights reserved.
Bioisosteric replacement of dihydropyrazole of 4S-(−)-3-(4-chlorophenyl)-N-methyl-N′-[(4-chlorophenyl)-sulfonyl]-4-phenyl-4,5-dihydro-1H-pyrazole-1-caboxamidine (SLV-319) a potent CB1 receptor antagonist by imidazole and oxazole
作者:Brijesh Kumar Srivastava、Rina Soni、Amit Joharapurkar、Kalapatapu V.V.M. Sairam、Jayendra Z. Patel、Amitgiri Goswami、Sandeep A. Shedage、Sidhartha S. Kar、Rahul P. Salunke、Shivaji B. Gugale、Amol Dhawas、Pravin Kadam、Bhupendra Mishra、Nisha Sadhwani、Vishal B. Unadkat、Prasenjit Mitra、Mukul R. Jain、Pankaj R. Patel
DOI:10.1016/j.bmcl.2007.12.036
日期:2008.2
Design, synthesis and conformational analysis of few imidazole and oxazole as bioisosters of 4S-(-)-3-(4-chlorophenyl)-N-methyl-N'-[(4-chlorophenyl)-sulfonyl]-4-phenyl-4,5-di hydro-1H-pyrazole-1-caboxamidine (SLV-319) 2 is reported. Computer assisted conformational analysis gave a direct clue for the loss of CB1 antagonistic activity of the ligands without a fine docking simulation for the homology