An efficient and simple methodology for the synthesis of 2-amino-4-(N-alkyl/arylamino)-6-chloropyrimidines
作者:Khalid Mohammed Khan、Sarosh Iqbal、Muhammad Arslan Bashir、Nida Ambreen、Shahnaz Perveen、Wolfgang Voelter
DOI:10.1016/j.tetlet.2015.01.153
日期:2015.3
In this study, twenty-nine 2-aminopyrimidine derivatives are synthesized in good to excellent yields by fusing 2-amino-4,6-dichloropyrimidine with different amines in the presence of triethylamine without using any solvent or catalyst. Nucleophilic substitution reactions of 2-amino-4,6-dichloropyrimidine with amines have also been performed in ethanol. Comparisons of the yields and reaction times for both solvent and solvent-free conditions have shown that the newly developed solvent-free protocol is high yielding, more efficient, and simpler compared to conventional methods. (C) 2015 Elsevier Ltd. All rights reserved.
Cooperative assembly of H-bonded rosettes inside a porphyrin nanoring
作者:Petr Motloch、Pernille S. Bols、Harry L. Anderson、Christopher A. Hunter
DOI:10.1039/d0sc06097f
日期:——
comparable dimensions and symmetry to the cavity of a butadiyne-linked 6-porphyrin nanoring. Functionalisation of each of the barbiturate components and the pyrimidine components of a H-bonded rosette with a pyridine ligand leads to a self-assembled hexapyridine ligand, which binds cooperatively to the zinc porphyrinnanoring. UV-vis-NIR and 1H NMR experiments show that the 7-component assembly forms at
三聚氰胺·巴比妥酸盐氢键玫瑰花结图案的尺寸和对称性与丁二炔连接的 6-卟啉纳米环的空腔相当。用吡啶配体对氢键花环的巴比妥酸盐组分和嘧啶组分中的每一种进行官能化,产生自组装的六吡啶配体,其与锌卟啉纳米环协同结合。UV-vis-NIR 和1 H NMR 实验表明,在没有三种组分之一的情况下,在既不形成氢键相互作用也不形成锌卟啉-吡啶相互作用的浓度下形成 7 组分组装。这些玫瑰花结复合物的平均有效摩尔浓度在 298 K 的氯仿中约为 200 mM。
Synthesis of 2-Aminopyrimidine Derivatives and Their Evaluation as β-Glucuronidase Inhibitors: In Vitro and In Silico Studies
evaluated for their β-glucuronidase inhibitory activity, and among them, compound 24 (IC50 = 2.8 ± 0.10 µM) showed an activity much superior to standard D-saccharic acid 1,4-lactone (IC50 = 45.75 ± 2.16 µM). To predict the binding mode of the substrate and β-glucuronidase, in silico study was performed. Conclusively, this study has identified a potentβ-glucuronidaseinhibitor that deserves to be further