The discovery and synthesis of novel adenosine receptor (A2A) antagonists
摘要:
In high throughput screening of our file compounds, a novel structure 1 was identified as a potent A(2A) receptor antagonist with no selectivity over the A(1) adenosine receptor. The structure-activity relationship investigation using 1 as a template lead to identification of a novel class of compounds as potent and selective antagonists of A(2A) adenosine receptor. Compound 26 was identified to be the most potent A(2A) receptor antagonist (K-i = 0.8 nM) with 100-fold selectivity over the A(1) adenosine receptor. (c) 2005 Elsevier Ltd. All rights reserved.
synthesis of fused pyridines by [2 + 2 + 1 + 1] the cycloaddition of ketones with an ammonium cation under a CO2 atmosphere. The reactions employed ammonium cation as a nitrogen source and CO2 gas as a carbon source in an aqueous solution. Monoethanolamine (MEA) was used as an additive to increase the solubility of CO2 in an aqueous solution. The scope and versatility of the method are demonstrated with 38
通过 [2 + 2 + 1 + 1] 酮与铵阳离子在 CO 2气氛下的环加成,探索了一种简单且绿色的合成稠合吡啶的方法。该反应在水溶液中使用铵阳离子作为氮源和CO 2气体作为碳源。单乙醇胺(MEA)用作添加剂以增加CO 2在水溶液中的溶解度。该方法的范围和多功能性通过 38 个示例进行了演示。发现产品具有光敏性,并显示出作为有机光电材料的潜在应用。在实验研究的基础上提出了一种selectfluor促进的反应机理。我们的工作非常出色,因为它是一个不含金属的系统,使用 CO 2 作为碳源和 MEA 作为水性合成中的添加剂。
Tricyclic pyrrole derivatives useful as 5-HT selective agents
申请人:Hoffmann-La Roche Inc.
公开号:US05646173A1
公开(公告)日:1997-07-08
The invention relates to tricyclic pyrrole derivatives useful as 5-HT selective agents of the formula ##STR1## wherein R.sup.1 to R.sup.4 are, independently, hydrogen, halogen, lower alkyl, phenyl, cycloalkyl or lower alkoxy and R.sup.2 additionally is lower alkoxycarbonyl, acyloxy or mesyloxy; R.sup.5 to R.sup.7 are, independently, hydrogen or lower alkyl; X is --CH.sub.2 CH(C.sub.6 H.sub.5)--, --CH.dbd.C(C.sub.6 H.sub.5)--, --YCH.sub.2 --, --CH.dbd.CH-- or --(CR.sup.11 R.sup.12).sub.n ; R.sup.11 and R.sup.12 are, independently, hydrogen, phenyl, lower alkyl or halogen; n is 1 to 3 and y is O or S, as well as pharmaceutically acceptable salts of basic compounds of formula I with pharmaceutically acceptable acids.
Functionalization of Styrenes by Copper-Catalyzed Borylation/<i>ortho</i>-Cyanation and Silver-Catalyzed Annulation Processes
作者:Wanxiang Zhao、John Montgomery
DOI:10.1002/anie.201507303
日期:2015.10.19
N‐cyano‐N‐phenyl‐p‐methylbenzenesulfonamide (NCTS) to a broad range of styrenes by utilizing IMesCuCl as catalyst. This step simultaneously accomplishes hydroboration of the alkene and ortho cyanation of the benzene unit. The products thus obtained are further functionalized by a AgNO3/Selectfluor‐mediated coupling of the BPin and cyano functionalities to annulate a new five‐membered ring. This combined two‐step
LDA-promoted asymmetric synthesis of β-trifluoromethyl-β-amino indanone derivatives with virtually complete stereochemical outcome
作者:Chen Xie、Haibo Mei、Lingmin Wu、Vadim A. Soloshonok、Jianlin Han、Yi Pan
DOI:10.1039/c3ra45773g
日期:——
We demonstrate that reactions between various 1-indanones and (SS)-N-tert-butanesulfinyl-(3,3,3)-trifluoroacetaldimine, conducted in the presence of catalytic amounts of LDA, occur with virtually complete stereochemical outcome, offering reliable and generalized access to biologically relevant β-trifluoromethyl-β-amino indanone derivatives. The products can be isolated in diastereomerically pure form simply by washing the crude reaction mixture with hexanes, underscoring practicality of the present method.