Development of selective and reversible pyrazoline based MAO-B inhibitors: Virtual screening, synthesis and biological evaluation
摘要:
In an effort to develop selective MAO (monoamine oxidase) B inhibitors, structure based virtual screening was initiated on an in-house library. Top 10 HITS were synthesized and evaluated for MAO (A and B) inhibitory activity, both against human and rat enzymes. All the compounds were found selective, reversible and active in nM range (100 times more potent than selegeline) towards MAO-B. Outstanding co-relation between predicted and experimental K(i) values were observed. (C) 2011 Elsevier Ltd. All rights reserved.
开发了聚芳烃两亲性探针,可参与阴离子胶束中Cu +离子的显色检测。在 Cu +离子存在下,观察到溶液颜色从黄色快速变为橙色。发现检测限在纳摩尔范围内。据我们所知,这是使用阴离子胶束作为稳定剂在水性介质中可见检测 Cu +离子的第一份报告。有趣的是,该化合物还可以检测生理氧化还原过程中原位产生的 Cu +离子。机理研究表明,探针分子与 Cu +形成反磁性四面体络合物离子,通过吡啶酮单元配位。此外,我们还跟踪了与 Cu +在由阴离子磷脂制成的双层表面上的相互作用。此外,使用Cu 2+探针集合来测定不同生物硫醇的还原能力,具体取决于其巯基 (–SH) 基团的p K a 。这使我们能够确定人尿样中存在的还原硫醇的量。考虑到目前系统的高灵敏度,我们筛选了从不同自然来源收集的水样中的 Cu +离子。接近 100% 的回收率值和相当小的相对标准偏差 (<5%) 表明本系统确实适用于现实生活中的样品分析。
Selective Reduction of α,β-Unsaturated Carbonyl Compounds with CO/H<sub>2</sub>O Catalyzed by Selenium under Atmospheric Pressure
作者:Shiwei Lu、Fengshou Tian
DOI:10.1055/s-2004-830871
日期:——
Selective reduction of α,β-unsaturated carbonyl compounds with carbon monoxide and water in the presence of a catalytic amount of selenium proceeded efficiently to afford the corresponding saturated carbonyl compounds in high yields under atmospheric pressure without use of a base.
Synthesis and Luminescence Spectral Properties of New Cyano-Substituted 2,2′-Bipyridine Derivatives
作者:M. Yu. Ievlev、N. S. Mayorov、M. A. Shishlikova、M. Yu. Belikov、I. N. Bardasov、O. V. Ershov
DOI:10.1134/s1070428021120095
日期:2021.12
Previously unknown 2-4-aryl-5-cyano-[2,2′-bipyridin]-6(1H)-ylidene}malononitriles were synthesized by reaction of 3-aryl-1-(pyridin-2-yl)prop-2-en-1-ones (azachalcones) with malononitrile dimer. Their colored solutions showed fluorescence in the yellow–orange region with the emission maxima located at λ 565 to 582 nm, depending on the substituent in position 4 of the pyridine ring bearing cyano groups
Ruthenium arene complexes with chalcone ligands incorporating pyridyl and anthryl units: Synthesis, aqueous stability and interaction with quadruplex DNA
作者:Alan K.X. Tan、Jing Kang Chia、Jia Jun Zen Teng、Yan Cheng Steve Chiow、Weiting Zhai、Simin Wu、Xuan Peng Lee、Xingtong Guo、Peter P.F. Lee、Rakesh Ganguly、Yong Leng Kelvin Tan
DOI:10.1016/j.ica.2023.121739
日期:2023.12
Twelve ruthenium(II) arene complexes incorporating chalcone ligands with pyridyl and anthryl units, as well as chlorido or oxalato ancillary ligands, have been synthesized and structurally characterized by 1H NMR spectroscopy, ESI mass spectrometry and elemental analysis. Compared to the oxalato compounds, the chlorido complexes were less stable and more susceptible to aquation in solution; the dissociation
合成了 12 种钌 (II) 芳烃配合物,其中包含带有吡啶基和蒽基单元的查尔酮配体,以及氯代或草酸根辅助配体,并通过 1 H NMR 光谱、ESI 质谱和元素分析进行了结构表征。与草酸根化合物相比,氯化物络合物稳定性较差,并且更容易在溶液中发生水化;在氯离子存在下,解离受到抑制。所有六种氯离子复合物和三种草酸根复合物都能够与四链体 DNA 结合,与c-myc相比,对 HTelo 表现出更高的选择性。阳离子种类3f,其中查尔酮与金属中心螯合,发现与 HTelo 的结合最强。这些结果表明辅助配体、吡啶环中N-供体原子的位置、α,β-不饱和酮相对于查尔酮部分中吡啶基和蒽基实体的位置,以及金属中心在改善此类复合物与四链体 DNA 的结合方面都发挥着重要作用。
Nitrogenous heterocyclic derivative and organic electroluminescent element employing the same