Synthesis and biological evaluation of a class of quinolone triazoles as potential antimicrobial agents and their interactions with calf thymus DNA
摘要:
A novel series of quinolone triazoles were synthesized and characterized by IR, NMR, MS and HRMS spectra. All the newly prepared compounds were screened for their antimicrobial activities against seven bacteria and four fungi. Bioactive assay manifested that most of new compounds exhibited good or even stronger antibacterial and antifungal activities against the tested strains including multi-drug resistant MRSA in comparison with reference drugs Norfloxacin, Chloromycin and Fluconazole. The preliminary interactive investigations of compound 6b with calf thymus DNA by fluorescence and UV-vis spectroscopic methods revealed that compound 6b could effectively intercalate DNA to form compound 6b-DNA complex which might block DNA replication and thus exert its antimicrobial activities. (C) 2013 Elsevier Ltd. All rights reserved.
acetylcholinesterase inhibitors (AChEIs). Molecular docking and scoring was utilized for the design of inhibitors. The molecules were synthesized via an easily accessible, convergent synthetic route. Three triazolopyrimidine based compounds showed nanomolar activity towards acetylcholinesterase. Among them, Ethyl 6-fluoro-4-(4-(5-methyl-[1,2,4]triazolo[1,5-a]pyrimidin-7-yl)piperazin-1-yl)quinoline-3-carboxylate (10d)
3-(Benzo[<i>d</i>]thiazol-2-yl)-4-aminoquinoline derivatives as novel scaffold topoisomerase I inhibitor <i>via</i> DNA intercalation: design, synthesis, and antitumor activities
作者:Jing-Mei Yuan、Nan-Ying Chen、Hao-Ran Liao、Guo-Hai Zhang、Xiao-Juan Li、Zi-Yu Gu、Cheng-Xue Pan、Dong-Liang Mo、Gui-Fa Su
DOI:10.1039/c9nj05846j
日期:——
Twenty-seven 3-(benzo[d]thiazol-2-yl)-4-aminoquinoline derivatives have been designed and synthesized as topoisomerase I inhibitors. The in vitro anti-proliferation evaluation against four human cancer cell lines (MGC-803, HepG-2, T24, and NCI-H460) and one normal cell line (HL-7702) indicated that most of them exhibited potent cytotoxicity. Among them, 5a was identified as the most promising candidate
已经设计并合成了二十七个3-(苯并[ d ]噻唑-2-基)-4-氨基喹啉衍生物作为拓扑异构酶I抑制剂。在体外针对四种人类肿瘤细胞系(MGC-803,人肝癌HepG-2,T24,和NCI-H460)和一个正常细胞系的抗增殖评价(HL-7702)表示,其中大部分表现出强的细胞毒性。其中,5a被认为是最有前途的候选物,其IC 50值低至约2.20±0.14,并被选作进一步探索。光谱分析和琼脂糖凝胶电泳分析表明5a可以与DNA相互作用并强烈抑制拓扑异构酶I(Topo I)。进一步筛选化合物5b的Topo I活性,5c,5e,5f,5h,5i,5j,5l和5n表明一些化合物可能与5a具有完全不同的细胞毒性。分子建模研究证实5a采用独特的模式与DNA和Topo I相互作用。其他分子机理研究表明,用5a处理MGC-803细胞可诱导S期阻滞,上调促凋亡蛋白,下调抗凋亡蛋白,激活caspase-3,随后诱导
Synthesis of substituted-4-oxo-1, 4-dihydro-3-[1-oxo-2-hydrazino-3-{ptoluenesulfon}] quinoline Derivatives and their Biological Activity Against Bacterial Infections
作者:N. SRIVATAVA、A. KUMAR
DOI:10.13005/ojc/290216
日期:2013.6.30
We have synthesized a series of quinolone and fluoroquinolones derivatives substituted with p-tosyl group. All these compounds were screened as antibacterial and datas were compared with reference marketed drug viz.; Ciprofloxacin & Norfloxacin.