Efficient synthesis of 1,2-benzisothiazoles from o-haloarylamidines and elemental sulfur via N–S/C–S bond formation under transition-metal-free conditions
A series of biaryl pyrazole and imidazole LiverXReceptor (LXR) partial agonists has been synthesized displaying LXRβ selectivity. The LXRβ selective partial agonist 18 was identified with potent induction of ATP binding transporters ABCA1 and ABCG1 in human whole blood (EC50 = 1.2 μM, 55% efficacy). In mice 18 displayed peripheral induction of ABCA1 at 3 and 10 mpk doses with no significant elevation
Nickel‐Catalyzed Annulation of
<i>o</i>
‐Haloarylamidines with Aryl Acetylenes: Synthesis of Isoquinolone and 1‐Aminoisoquinoline Derivatives
作者:Hao Xie、Qiaoyan Xing、Zhifei Shan、Fuhong Xiao、Guo‐Jun Deng
DOI:10.1002/adsc.201801635
日期:2019.4.16
An efficient method for the synthesis of substituted 1(2H)‐isoquinolone derivatives via nickel‐catalyzed annulation of substituted 2‐halobenzamidines with aryl alkynes in the presence of water is described. Benzo[4,5]imidazo[2,1‐a]isoquinolines were formed as the dominated products when dry dimethyl sulfoxide was used as the solvent. Furthermore, when benzyl substituted amidines were used as the substrates
Optimization of imidazole amide derivatives as cannabinoid-1 receptor antagonists for the treatment of obesity
作者:Roger A. Smith、Zahra Fathi、Furahi Achebe、Christiana Akuche、Su-Ellen Brown、Soongyu Choi、Jianmei Fan、Susan Jenkins、Harold C.E. Kluender、Anish Konkar、Rico Lavoie、Ronald Mays、Jennifer Natoli、Stephen J. O’Connor、Astrid A. Ortiz、Ning Su、Christy Taing、Susan Tomlinson、Theresa Tritto、Gan Wang、Stephan-Nicholas Wirtz、Wai Wong、Xiao-Fan Yang、Shihong Ying、Zhonghua Zhang
DOI:10.1016/j.bmcl.2007.03.011
日期:2007.5
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.
Diarylimidazolyl oxadiazole and thiadiazole derivatives as cannabinoid CB1 receptor antagonists
Since the CB1 receptor antagonist SR141716 (rimonabant) was reported to modulate food intake, CB1 antagonism has been considered as a new therapeutic target in the treatment of obesity. Several series of derivatives based on diarylimidazolyl oxadiazole and thiadiazole scaffolds were synthesized and tested for CB1 receptor binding affinity. SAR studies directed toward the optimization of imidazole scaffolds resulted in the discovery of 10s which showed highest potency for CB1 receptor binding affinity (IC50 = 1.91 nM) prepared to date. (C) 2008 Elsevier Ltd. All rights reserved.
An eco-friendly approach for the synthesis of 1,2,5-trisubstituted and 4-amino-1,2,5-tetrasubstituted imidazoles via a multi-component condensation