Analogs of platelet activating factor. 6. Mono- and bis-aryl phosphate antagonists of platelet activating factor
摘要:
A series of aryl phosphoglyceride (3, 19-6 1) and bis-aryl phosphate (67-135) antagonists of platelet activating factor (PAF) were prepared. A group of four bifunctional phosphorus reagents (5a-c and 7) were developed that allowed the preparation of these aryl phosphates in which the position of aromatic substitution can be varied. These compounds were examined for their ability to inhibit PAF-induced platelet aggregation of rabbit platelets. Selected compounds were also evaluated for their ability to displace [H-3]PAF from its receptor on rabbit platelets. These in vitro data were compared to similar data obtained for a number of known PAF antagonists. The compounds were evaluated in vivo, in both the mouse and rabbit, for their ability to prevent death induced by a lethal challenge of PAF. The relationships between the biological activity and the nature, lipophilicity, and position of substituents of the aromatic rings were studied. Compound 105 (CL 184005) has been selected to undergo further development as a potential therapeutic agent for the treatment of septic shock in man.
A Platform of Phenol-Based Nitroxide Radicals as an “EPR Toolbox” in Supramolecular and Click Chemistry
作者:Till Hauenschild、Dariush Hinderberger
DOI:10.1002/cplu.201800429
日期:2019.1
group(s) on each SP/SL, the synthesized nitroxideradicals serve as polyphilic molecular "toolbox" for the EPR-spectroscopic detection and characterization of specific types of interactions, e. g. π-π interactions, sulfur-sulfur interactions, hydrogenbonding, electrostatic and dipole-dipole interactions, and van der Waals and hydrophobic interactions, in the presence of the selected supramolecular systems
We demonstrate a fluid–fluid phaseseparation in 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC) membranes using a metal complex lipid of type [Mn(L1)] (1; HL1=1-(2-hydroxybenzamide)-2-(2-hydroxy-3-formyl-5-hexadecyloxybenzylideneamino)ethane). Small amount of 1 produces two separated domains in DMPC, whose phase transition temperatures of lipids (Tc) are both lower than that of the pristine DMPC
Bent Tridentate Receptors in Calamitic Mesophases with Predetermined Photophysical Properties: New Luminescent Lanthanide-Containing Materials
作者:Homayoun Nozary、Claude Piguet、Paul Tissot、Gérald Bernardinelli、Jean-Claude G. Bünzli、Robert Deschenaux、Daniel Guillon
DOI:10.1021/ja982545n
日期:1998.12.1
6-bis(benzimidazol-2‘-yl)pyridine cores into rodlike ligands L11-17. The crystal structure of the nonmesogenic ligand L13 (C39H37N5O4, triclinic, P1, Z = 2) shows the expected trans−trans conformation of the tridentate binding unit, which provides a linear arrangement of the semirigid aromatic sidearms. The crystal structure of the related mesogenic ligand L16 (C61H81N5O4, triclinic, P1, Z = 2) demonstrates
已开发出一种新的合成策略,将弯曲且刚性的三齿 2,6-双(苯并咪唑-2'-基)吡啶核引入棒状配体 L11-17。非介晶配体 L13(C39H37N5O4,三斜,P1,Z = 2)的晶体结构显示了三齿结合单元的预期反式-反式构象,它提供了半刚性芳香侧臂的线性排列。相关介晶配体 L16(C61H81N5O4,三斜,P1,Z = 2)的晶体结构表明亲脂侧链采用完全延伸的构象,导致略微螺旋扭曲的 I 形分子。通过明智地选择刚性中心核和半刚性亲脂性侧臂之间的间隔物,可以产生丰富多样的介晶现象,可以与电子和光物理特性的同时调整相结合。配体 L13,14 与 Ln(NO3)3·xH2O 反应以定量和选择性地生成中性 1:1 配合物 [Ln(Li)( )3] (Ln = La to Lu),它们稳定...
LB film structure of poly(2-methoxy,5-(8-methoxy-3,6-dioxa-1-undecoxy)-p-phenylene vinylene) studied by spectroscopy
作者:Zhongkui Wu、Sanxie Wu、Yingqiu Liang
DOI:10.1016/s1386-1425(02)00392-x
日期:2003.5
structure for introducing di(ethylene oxide) methyl ether (DEOM) side chains to conjugated main chains. The longalkyl side chains are characterized by all trans-zigzag conformation and average tiltangle of 36+/-1.5 degrees. The layer-by-layer multilayer of MMDU-PPV obtained by Langmuir-Blodgett technique exhibits some in-plane anisotropy and more pure photoluminescence than that of the dilute MMDU-PPV