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
Quinoline-3-carboxamide containing sulfones as liver X receptor (LXR) agonists with binding selectivity for LXRβ and low blood–brain penetration
A series of quinoline-3-carboxamide containing sulfones was prepared and found to have good binding affinity for LXRβ and moderate binding selectivity over LXRα. The 8-Cl quinoline analog 33 with a high TPSA score, displayed 34-fold binding selectivity for LXRβ over LXRα (LXRβ IC50 = 16 nM), good activity for inducing ABCA1 gene expression in a THP macrophage cell line, desired weak potency in the
Antimalarials: Synthesis of 4-aminoquinolines that circumvent drug resistance in malaria parasites
作者:Dibyendu De、Larry D. Byers、Donald J. Krogstad
DOI:10.1002/jhet.5570340149
日期:1997.1
substitution with neat amine rather than in phenol, regioselective reductive alkylation to convert the terminal primaryamine (12a–20a) on the diaminoalkane side chain to a diethylamino group, and purification by column chromatography with basic alumina. The 1H nmr spectra obtained after regioselective reductive alkylation with sodium borodeuteride (in comparison with sodiumborohydride) demonstrated that
此处描述的策略已允许合成一系列4-氨基喹啉抗疟药。对先前合成方法的实质性改进包括用纯胺而不是苯酚进行亲核取代,区域选择性还原烷基化以将二氨基烷烃侧链上的末端伯胺(12a-20a)转化为二乙氨基,以及通过使用碱性氧化铝的柱色谱法进行纯化。用硼氘化钠(与硼氢化钠相比)进行区域选择性还原烷基化后获得的1 H nmr光谱表明,该还原烷基化是通过形成并随后原位还原相应的二酰胺而进行的。
Design, synthesis, and biological evaluation of novel quinoline derivatives as HIV-1 Tat–TAR interaction inhibitors
作者:Shuguang Chen、Ran Chen、Meizi He、Ruifang Pang、Zhiwu Tan、Ming Yang
DOI:10.1016/j.bmc.2009.01.038
日期:2009.3
Thirty-two quinoline derivatives were designed and synthesized as HIV-1 Tat–TAR interactioninhibitors. All the compounds showed high antiviral activities in inhibiting the formation of SIV-induced syncytium in CEM174 cells. Nine of them with low cytotoxicities were evaluated by Tat dependent HIV-1 LTR-driven CAT gene expression colorimetric enzyme assay in human 293T cells, indicating effective inhibitory
Geminal diesters, N-alkyl/aryl-2,2-bis(ethoxycarbonyl)vinylamines, were found to undergo selective hydrolysis in the presence of BF3·OEt2 at room temperature to give the corresponding half esters. Neighboring group participation by nitrogen in the hydrolysis was observed. This method is useful for the preparation of highly functionalized malonic acid half esters.