Ag/CdS Nanocomposite: An Efficient Recyclable Catalyst for the Synthesis of Novel 8-Aryl-8H-[1,3]dioxolo[4,5-g]chromene-6-carboxylic Acids under Mild Reaction Conditions
作者:Shahrzad Abdolmohammadi、Seyed Reza Rasouli Nasrabadi、Ahmad Seif、Narges Elmi Fard
DOI:10.2174/1386207321666180604104456
日期:2018.7.20
properties. The effectiveness of catalytic activity of CdS NPs can be improved due to the combined effect of Ag particles. RESULTS Ag/CdS nanocomposite is a readily available, recyclable, and non-toxic catalystused for the highly efficientsynthesis of novel 8-aryl-8H-[1,3]dioxolo[4,5-g]chromrne-6-carboxylic acids. This reaction is conveniently performed under mild reaction conditions. All synthesized compounds
Crystal Engineering of 6-Carboxy-4-aryl-2,2′-bipyridine Complexes: Potent Chelators with Intrinsic Intermolecular Affinity
作者:Hannah L. Dalton、Chris S. Hawes、Thorfinnur Gunnlaugsson
DOI:10.1021/acs.cgd.7b00683
日期:2017.8.2
[Cd3(L1)3(NO3)2(DMF)4]NO3 3 and [Cd3(L2)3(NO3)2(DMF)4]NO3·DMF 4, in which three cadmium ions, with pentagonal bipyramidal coordination geometries, form disc-shaped assemblies with L1/L2, which undergo further weak interactions between neighboring complexes in the crystalline state. With these outcomes L1 and L2 are established as exciting new building blocks for metallosupramolecular assemblies involving d-block
本文中,我们分别报道了两种多功能叔齿2,2'-联吡啶衍生物4-和3-(4-硝基苯基)-2,2'-联吡啶-6-羧酸盐L1 / L2的配位化学和结构性质。我们报告八个新的配合物与Cd II,Co II和Co III,并研究其在结晶相中的行为,以期将L1和L2确立为在扩展的金属超分子体系中使用的稳健和功能性螯合剂。二价络合物[Cd(L1)2 ]·H 2 O 1,[Cd(L2)2 ]2,[Co(L1)2 ] 5和[Co(L2)2 ] 7是具有扭曲的八面体配位几何形状的单核络合物,由两个子午配位的L1 / L2配体决定。还报道了两种三价副产物[Co(L1)2 ] NO 3 6和[Co(L2)2 ] NO 3 8,它们在初始筛选配合物5和7时以痕量形式形成。, 分别。这些配合物的扩展结构主要由大量的分子间相互作用(包括阴离子···π空穴相互作用)决定。从1和2修改反应条件得到两个紧密相关的三核簇物质[Cd
Functionalisation of gold nanoparticles with ruthenium(<scp>ii</scp>) polypyridyl complexes for their application in cellular imaging
作者:Sandra Estalayo-Adrián、Gavin J. McManus、Hannah L. Dalton、Aramballi J. Savyasachi、John M. Kelly、Thorfinnur Gunnlaugsson
DOI:10.1039/d0dt02754e
日期:——
that combine the advantageous properties of both moieties. Both free complexes show the attractive photophysical properties of Ru(II) polypyridylcomplexes and a rapid cellularuptake in HeLa cervical cancer cells. However, their corresponding gold conjugates displayed lower quantum yields than those determined for the free complexes presumed to be due to an energy transfer quenching of the Ru(II) luminescence
Synthesis and biological evaluation of α-ketoamides as inhibitors of the Dengue virus protease with antiviral activity in cell-culture
作者:Christian Steuer、Christian Gege、Wolfgang Fischl、Karl H. Heinonen、Ralf Bartenschlager、Christian D. Klein
DOI:10.1016/j.bmc.2011.05.015
日期:2011.7
The development of small molecule inhibitors of the viral protease is of considerable interest for the treatment of emergent flaviviral diseases such as Dengue or West Nile fever. Until today little progress has been made in finding drug-like compounds that inhibit the protease and provide a starting point for lead optimization. We describe here the initial steps of a drug discovery effort that focused on the styryl pharmacophore, combined with a ketoamide function to serve as electrophilic trap for the catalytic serine. This resulted in a fragment-like lead compound with reasonable target affinity and good ligand efficiency, which was extensively modified to explore structure-activity relationships. Selected compounds were cross-tested against the West Nile virus protease and thrombin, indicating that selectivity for one or more flaviviral proteases can be achieved. Finally, the antiviral activity of several protease inhibitors was confirmed in a cell-culture model of Dengue virus replication. The SAR presented here may serve as starting point for further drug discovery efforts with the aim of targeting flaviviral proteases. (C) 2011 Elsevier Ltd. All rights reserved.
Giua, Gazzetta Chimica Italiana, 1919, vol. 49 II, p. 171