合成了一系列新颖的荧光芳基苯乙烯基咪唑并[1,2-a]吡啶,并对其进行了充分表征。如1 H NMR光谱法明确显示的,所有苯乙烯基衍生物具有乙烯基双键的E-构型。观察到,E异构体在固态下是稳定的。然而,具有强供电子二烷基氨基取代基的衍生物经历了部分E - Z在室温下在溶液中异构化。苯乙烯基衍生物在紫外线或可见光区域吸收并发出中等斯托克斯位移的光。这些化合物表现出氟溶剂变色,即发射带随着溶剂极性的增加而红移。而且,由于咪唑并[1,2-a]吡啶环的氮原子的质子化增加了π系统的供体-受体相互作用,因此,苯乙烯基衍生物的吸收和发射性质在酸化后会急剧变化。
A series of new fluorescent arylstyrylimidazo[1,2-a]pyridines was synthesized and fully characterized. It is observed that the E isomers are stable in the solid state and in solutions. The absorption and emission properties of the compounds changed drastically upon acidification. The compounds showed good thermal stability for practical applications. In addition, antimicrobial, antioxidant, and DNA-cleavage activity of the compounds were examined. The results indicate that the compounds did not show any antimicrobial and antioxidant activity. However, they caused decreased mobility of form I DNA and also showed DNA cleavage activity. (C) 2015 Elsevier B.V. All rights reserved.
Novel Triaryl Sulfonamide Derivatives as Selective Cannabinoid Receptor 2 Inverse Agonists and Osteoclast Inhibitors: Discovery, Optimization, and Biological Evaluation
eight compounds as potent and selective CB2 inverseagonists with high binding affinity (CB2Ki < 10 nM). Especially, compound 57 exhibited the strongest binding affinity on the CB2 receptor (CB2Ki of 0.5 nM) and the best selectivity over the CB1 receptor (selectivity index of 2594). Importantly, 57 also showed potent inhibitory activity on osteoclast formation, and it was confirmed by a cell viability
大麻素受体作为开发潜在治疗配体的药物靶点越来越受到关注。在这里,我们报告了三芳基磺酰胺的发现和优化作为具有显着 CB 2受体亲和力和选择性的新系列。设计并合成了四组三芳基配体以进行进一步的结构修饰,并导致将八种化合物鉴定为具有高结合亲和力(CB 2 K i < 10 nM)的有效和选择性 CB 2反向激动剂。尤其是化合物57对CB 2受体(CB 2 K i0.5 nM)和对 CB 1受体的最佳选择性(选择性指数为 2594)。重要的是,57还显示出对破骨细胞形成的有效抑制活性,并且通过细胞活力测定证实了抑制作用并非来自细胞毒性。最后,3D QSAR 研究证实了我们的 SAR 发现,即三个庞大的基团对 CB 2受体结合亲和力起着重要作用。
Synthesis and photophysical properties of fluorescent arylstyrylimidazo[1,2-a]pyridine-based donor-acceptor chromophores
作者:Zeynel Seferoğlu、Heiko Ihmels、Ertan Şahin
DOI:10.1016/j.dyepig.2014.09.016
日期:2015.2
temperature. The styryl derivatives absorb in the UV or visible region and emit light with moderate Stokes shifts. These compounds exhibit fluorosolvatochromism, namely the emission band is red shifted with increasing solvent polarity. Moreover, the absorption and emission properties of the styryl derivatives change drastically upon acidification, as the protonation of the nitrogenatoms of the imidazo[1
合成了一系列新颖的荧光芳基苯乙烯基咪唑并[1,2-a]吡啶,并对其进行了充分表征。如1 H NMR光谱法明确显示的,所有苯乙烯基衍生物具有乙烯基双键的E-构型。观察到,E异构体在固态下是稳定的。然而,具有强供电子二烷基氨基取代基的衍生物经历了部分E - Z在室温下在溶液中异构化。苯乙烯基衍生物在紫外线或可见光区域吸收并发出中等斯托克斯位移的光。这些化合物表现出氟溶剂变色,即发射带随着溶剂极性的增加而红移。而且,由于咪唑并[1,2-a]吡啶环的氮原子的质子化增加了π系统的供体-受体相互作用,因此,苯乙烯基衍生物的吸收和发射性质在酸化后会急剧变化。