Structure–activity relationship (SAR) studies of quinoxalines as novel HCV NS5B RNA-dependent RNA polymerase inhibitors
摘要:
From chemical compound library screening using an HCV NS5B RNA-dependent RNA polymerase enzymatic assay, we identified a substituted quinoxaline hit with an IC50 of 5.5 mu M. A series of substituted quinoxaline amide derivatives were synthesized based on the hit's pharmacophore, and a good structure-activity relationship was observed. Computer modeling analysis was employed to help comprehend the SAR. (c) 2007 Elsevier Ltd. All rights reserved.
ELECTRONIC DEVICES MADE WITH ELECTRON TRANSPORT AND/OR ANTI-QUENCHING LAYERS
申请人:LECLOUX DANIEL DAVID
公开号:US20090121617A1
公开(公告)日:2009-05-14
The present invention is directed to a photoactive device comprising an anode, a cathode, and a photoactive layer, which device further comprises an electron transport and/or anti-quenching layer which minimizes both electron transfer quenching and energy transfer quenching of the photoactive layer.
Synthesis and evaluation of quinoxaline derivatives as potential influenza NS1A protein inhibitors
作者:Lei You、Eun Jeong Cho、John Leavitt、Li-Chung Ma、Gaetano T. Montelione、Eric V. Anslyn、Robert M. Krug、Andrew Ellington、Jon D. Robertus
DOI:10.1016/j.bmcl.2011.03.042
日期:2011.5
A library of quinoxaline derivatives were prepared to target non-structural protein 1 of influenza A (NS1A) as a means to develop anti-influenza drug leads. An in vitro fluorescence polarization assay demonstrated that these compounds disrupted the dsRNA-NS1A interaction to varying extents. Changes of substituent at positions 2, 3 and 6 on the quinoxaline ring led to variance in responses. The most active compounds (35 and 44) had IC50 values in the range of low micromolar concentration without exhibiting significant dsRNA intercalation. Compound 44 was able to inhibit influenza A/Udorn/72 virus growth. (C) 2011 Elsevier Ltd. All rights reserved.
A Photosensitizer Dinuclear Ruthenium Complex: Intramolecular Energy Transfer to a Covalently Linked Fullerene Acceptor
作者:Dirk M. Guldi、Michele Maggini、Enzo Menna、Gianfranco Scorrano、Paola Ceroni、Massimo Marcaccio、Francesco Paolucci、Sergio Roffia
A fullerene derivative (5) in which a dinuclear ruthenium complex is covalently linked to a fulleropyrrolidine (FP) through a rigid spacer has been prepared through azomethine ylide cycloaddition to C-60 Electrochemical and photophysical studies revealed that ground-state electronic interactions between the bimetallic ruthenium chromophore and the FP moiety are small. The absorption spectrum of 5 displays a metal-to-ligand charge transfer (MLCT) transition at about 620 nm in CH2Cl2 which is shifted by nearly 160 nm relative to that of a previously reported mononuclear dyad (8). The photophysical investigations have also shown that both in dichloromethane and acetonitrile the photoexcited MLCT state of dyad 5 transforms into the fullerene triplet excited state with a quantum yield of 0.19 and that, contrary to mononuclear dyad 8, electron transfer, if any under the applied conditions, is negligible relative to energy transfer.
CHARGE TRANSPORT COMPOSITIONS AND ELECTRONIC DEVICES MADE WITH SUCH COMPOSITIONS
申请人:Herron Norman
公开号:US20080227981A1
公开(公告)日:2008-09-18
The present invention relates to charge transport compositions. The invention further relates to electronic devices in which there is at least one active layer comprising such charge transport compositions.