Efficient synthesis of 1,2-benzisothiazoles from o-haloarylamidines and elemental sulfur via N–S/C–S bond formation under transition-metal-free conditions
Efficient synthesis of 1,2-benzisothiazoles from o-haloarylamidines and elemental sulfur via N–S/C–S bond formation under transition-metal-free conditions
Nickel‐Catalyzed Annulation of
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‐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
Synthesis of 1,2,4,5‐tetrasubstituted imidazoles and 2,4,5,6‐tetrasubstituted pyrimidines: three‐component, the one‐pot reaction of arylamidines, malononitrile, and arylglyoxals or aryl aldehydes
efficient one‐potsynthesis of the 1,2,4,5‐tetrasubstitutedimidazoles and 2,4,5,6‐tetrasubstitutedpyrimidines through an arylamidine, malononitrile, and carbonyl compound by using Et3N in CH3CN at reflux conditions was developed. The nature of the carbonyl compounds were different; when the carbonyl compound was arylglyoxal or arylaldehyde, 1,2,4,5‐tetrasubstitutedimidazole and 2,4,5,6‐tetrasubstituted
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.
A Facile and Effective Procedure for Synthesis of Polyfunctionalized Bis (imidazolyl) Pyrrole/Imidazolyl Indole from Pyrrole/Indole with Arylglyoxals and<i>N</i>‐aryl amidines
Heterocyclic systems containing bis (imidazolyl) pyrrole or imidazolyl indole moieties were synthesized by heterocyclization of pyrrole or indole with arylglyoxal monohydrates and N‐aryl amidines in ethanol catalyzed by FeCl3 at room temperature. The paper reports a facile, efficient, and environmentally friendly protocol for the synthesis of new products. Products were isolated by simple filtration, and their structures were established from their spectroscopic data.
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