Synthesis of Imidazo[1,2-a]pyridines as Antiviral Agents
摘要:
The synthesis of original imidazo[1,2-a]pyridines bearing a thioether side chain at the 3 position and their antiviral activity are reported. From the synthesized compounds, 4, 15, and 21 were highly active against human cytomegalovirus with a therapeutic index superior to 150. These compounds also showed pronounced activity against varicella-zoster virus. Their structure-activity relationship is discussed.
Oxidative bromination of imidazoheterocycle bromohydrates*
摘要:
The behavior of imidazo[1,2-a]pyridinium, imidazo[1,2-a]pyrimidinium, and imidazo[2,1-b]thiazolium bromides derivatives in oxidative bromination reactions has been studied. It has been established that reaction products structures and their yields depend on the properties of the substituents in the bicycle and the oxidant concentration.
explored, and the PDHK2 X-ray structure with a representative compound revealed a novel ATP lid conformation in which the phenyl ring of Phe326 mediated the interaction of the Arg258 sidechain and the compound. Compounds with amide linkers were designed to release the ATP lid by forming an intramolecular pi-pi interaction, and these compounds showed single-digit nM IC50 values in an enzymatic assay. We
丙酮酸脱氢酶激酶 (PDHK) 是许多疾病(包括糖尿病和癌症)的迷人药物靶点。在本报告中,我们描述了我们基于结构的药物设计的三环先导化合物的结果,这导致在酶测定中发现了高效的 PDHK2 和 PDHK4 双重抑制剂。探索了三环核心的 C3 位,具有代表性化合物的 PDHK2 X 射线结构揭示了一种新的 ATP 盖构象,其中 Phe326 的苯环介导了 Arg258 侧链与化合物的相互作用。具有酰胺接头的化合物旨在通过形成分子内 pi-pi 相互作用来释放 ATP 盖,这些化合物显示单位数 nM IC 50酶测定中的值。我们还探索了三环核心的 C4 位以重现观察到的与 C3 位取代的相互作用,并且吡咯烷化合物显示出相同水平的 IC 50值。通过对接模拟优化与 Asn255 侧链的相互作用,具有 2-羧基吡咯部分的化合物也显示出个位数的 nM IC 50值,而与 Arg258 侧链没有阳离子-pi
[EN] IMIDAZOPYRIDINES SYK INHIBITORS<br/>[FR] INHIBITEURS DE SYK À BASE D'IMIDAZOPYRIDINES
申请人:GILEAD SCIENCES INC
公开号:WO2011112995A1
公开(公告)日:2011-09-15
Certain imidazopyridines (I) and pharmaceutical compositions thereof are provided herein. Methods of treating patients suffering from certain diseases and disorders responsive to the inhibition of Syk activity, which comprises administering to such patients an amount of at least one chemical entity effective to reduce signs or symptoms of the disease or disorder are provided. Also provided are methods for determining the presence or absence of Syk kinase in a sample.
<i>N</i>-bromosuccinimide reactions of some heterocycles in the presence or absence of water: An overview of ring versus side chain bromination for the synthesis of important brominated heterocyclic synthons
Reactions of various heterocycles 1–6 with N-bromosuccinimide in the presence or absence of water have been studied for side chain versus ring bromination to afford some new and important heterocyclic synthons. Interestingly, the N-bromosuccinimide reaction in the presence of perchloric acid, a new condition, affords exclusively the new dibromo aminopicoline 1f, which is not obtained by other presently
Synthesis and characterization of new bis(1-aryliminomethylenylnaphthalen-2-oxy)nickel complexes and their catalytic behavior for vinyl polymerization of norbornene
作者:Fei Chang、Dongheng Zhang、Guiyun Xu、Haijian Yang、Jitai Li、Haibin Song、Wen-Hua Sun
DOI:10.1016/j.jorganchem.2003.12.024
日期:2004.3
to form bis(1-aryliminomethylenylnaphthalen-2-oxy)nickel complexes. All resultant compounds were structurally characterized by elemental analyses, IR and H NMR, and the structures of the formed complexes were elucidated by X-ray crystal structure analysis. The complexes show high catalytic activities for the vinyl polymerization of norbornene in the presence of methylaluminoxane. The catalytic activity
合成的1-芳基亚甲基亚甲基萘-2-醇衍生物与氯化镍反应形成双(1-芳基亚甲基亚甲基萘-2-氧基)镍配合物。通过元素分析,IR和1 H NMR对所有所得化合物的结构进行表征,并通过X射线晶体结构分析阐明形成的配合物的结构。在甲基铝氧烷的存在下,该配合物对降冰片烯的乙烯基聚合显示出高催化活性。气相色谱法通过监测降冰片烯的转化来跟踪催化活性的变化。