计算机辅助药物发现方法在治疗重要的小分子的开发中发挥着重要作用,但它们的性能需要改进。混合溶剂中的分子动力学模拟有助于理解蛋白质-配体识别和改进分子对接预测。在这项工作中,我们使用乙醇作为助溶剂来寻找配体与蛋白激酶 G 的相关相互作用,蛋白激酶 G 是结核分枝杆菌( Mtb ) 的必需蛋白。)。我们通过筛选片段样化合物和另一种已知激酶抑制剂的数据库来验证热点。接下来,我们进行了药效团引导的对接模拟,发现了三种低微摩尔抑制剂,包括一种具有新型化学支架的抑制剂,我们将其扩展到四种衍生化合物。通过内在荧光猝灭测定、等温滴定量热法和熔解曲线分析来表征结合亲和力。通过 X 射线晶体学证实了预测的结合模式。最后,这些化合物显着抑制了感染的 THP-1 巨噬细胞中Mtb的活力。
Ultrasound-assisted 1,3-dipolar cycloaddition and cyclopropanation reactions for the synthesis of bis-indolizine and bis-cyclopropane derivatives
作者:Mehdi Abaszadeh、Mohammad Seifi
DOI:10.1039/c4ob01305k
日期:——
Ultrasound irradiation can promote the 1,3-dipolar cycloaddition reaction of 2-chloropyridinium ylides with 2-benzylidenemalononitrile or 2,2′-(1,4-phenylenebis(methanylylidene))dimalononitrile, to afford the indolizine and bis-indolizine derivatives respectively. While the reaction of pyridinium ylides with 2-benzylidenemalononitrile or 2,2′-(1,4-phenylenebis(methanylylidene))dimalononitrile under ultrasound irradiation provided, in an unusual manner, cyclopropane and bis-cyclopropane derivatives, respectively. These cycloaddition and cyclopropanation reactions were carried out in the presence of triethylamine, in acetonitrile, at room temperature.
New mesoionic systems of azolopyridine series 2. Synthesis, structures, and biological activity of 2-aminothiazolo[3,2-a]pyridinium salts and thiazolo[3,2-a]pyridinium 2-imidates
作者:E. V. Babaev、A. A. Bush、I. A. Orlova、V. B. Rybakov、I. Iwataki
DOI:10.1007/s11172-005-0242-3
日期:2005.1
A new procedure was developed for the synthesis of 2-aminothiazolo[3,2-a]pyridiniumsalts 8 by the reaction of 2-halo-N-phenacylpyridinium salts with KSCN. The anion compositions of salts 8 were studied by ion chromatography. Acylation of salts 8 afforded representatives of the previously unknown bicyclic mesoionic thiazolo[3,2-a]pyridinium 2-imidate system 9. The three-dimensional structures of 2
A self-[3+2] annulation reaction of pyridinium salts has been developed for the synthesis of N-indolizine-substituted pyridine-2(1H)-ones. This protocol was carried out under mild reaction conditions without any precious catalysts in generally moderate to good yields. Additionally, a plausible mechanism for the transformation was proposed.
吡啶鎓盐的自[3+2] 环化反应已被开发用于合成N-中氮茚取代的吡啶-2(1 H )-酮。该方案是在温和的反应条件下进行的,没有任何贵重的催化剂,产率通常适中。此外,还提出了一种合理的转化机制。
Quaternary Salts of Halogenated Pyridines and Quinolines<sup>1</sup>
作者:Carl T. Bahner、Wm. K. Easley、Madge D. Pickens、Harold D. Lyons、Lilburn L. Norton、Betty Gay Walden、George E. Biggerstaff