colchicine binding site in tubulin. In addition, it also underlined that higher tubulin affinities are linked with (i) bulkier alkyl and aryl moieties on the benzimidazole nitrogen and (ii) electron-donating substituents on the phenyl group that allow deeper entrance into the hydrophobic pocket within the tubulin’s β-subunit, consisting of Leu255, Leu248, Met259, Ala354, and Ile378 residues.
a result of our previous research focussed on benzimidazoles, herein we present design, synthesis, QSAR analysis and biological activity of novel N-substituted benzimidazole derived carboxamides. Carboxamides were designed to study the influence of the number of methoxy groups, the type of the substituent placed at the benzimidazole core on biological activity. Pronounced antioxidative activity displayed
摘要 由于我们之前的研究集中在苯并咪唑上,在此我们介绍了新型 N 取代苯并咪唑衍生甲酰胺的设计、合成、QSAR 分析和生物活性。Carboxamides 旨在研究甲氧基数量、苯并咪唑核心上的取代基类型对生物活性的影响。显着的抗氧化活性显示出未取代的28 (IC 50 ≈ 3.78 mM, 538.81 mmolFe 2+ /mmolC) 和二甲氧基取代的衍生物34 (IC 50 ≈ 5.68 mM, 618.10 mmolFe 2+ /mmolC)。三甲氧基取代的43和未取代的化合物40在 N 原子上具有异丁基侧链的 HCT116(IC 50 ≈ 0.6 µM,两者)和 H 460 细胞(IC 50 ≈ 2.5 µM;0.4 µM)具有很强的活性,对非肿瘤细胞的细胞毒性较小。细胞中的抗氧化活性通常证实了在衍生物34和40的 DPPH/FRAP 测定中获得的相对适度的抗氧化能力。生成
Novel Biologically Active N-Substituted Benzimidazole Derived Schiff Bases: Design, Synthesis, and Biological Evaluation
benzimidazole-derived Schiffbases, and the evaluation of their antiviral, antibacterial, and antiproliferative activity. The impact on the biologicalactivity of substituents placed at the N atom of the benzimidazole nuclei and the type of substituents attached at the phenyl ring were examined. All of the synthesized Schiffbases were evaluated in vitro for their antiviral activity against different viruses
在此,我们介绍了新型 N-取代苯并咪唑衍生的席夫碱的设计和合成,以及它们的抗病毒、抗菌和抗增殖活性的评估。检测了位于苯并咪唑核 N 原子上的取代基对生物活性的影响以及连接在苯环上的取代基类型。所有合成的席夫碱都在体外评估了它们对不同病毒的抗病毒活性、对一组细菌菌株的抗菌活性以及对几种人类癌细胞系的抗增殖活性,从而能够研究结构-活性关系。注意到一些轻微的抗病毒作用,尽管与包含的参考药物相比浓度更高。此外,一些衍生物显示出适度的抗菌活性,前体 23 对大多数测试的细菌菌株具有广泛的活性。最后,席夫碱 40,一种 4-N,N-二乙氨基-2-羟基取代的衍生物,在苯并咪唑核的 N 原子上带有一个苯环,对几种癌细胞系表现出很强的抗增殖活性(IC50 1.1–4.4 μM ). 对急性髓性白血病 (HL-60) 观察到最强的抗肿瘤作用。
4-(Benzimidazol-2-yl)-1,2,5-oxadiazol-3-ylamine derivatives: Potent and selective p70S6 kinase inhibitors
作者:Upul Bandarage、Brian Hare、Jonathan Parsons、Ly Pham、Craig Marhefka、Guy Bemis、Qing Tang、Cameron Stuver Moody、Steve Rodems、Sundeep Shah、Chris Adams、Jose Bravo、Emmanuelle Charonnet、Vladimir Savic、Jon H. Come、Jeremy Green
DOI:10.1016/j.bmcl.2009.07.022
日期:2009.9
We report herein the design and synthesis of 4-(benzimidazol-2-yl)-1,2,5-oxadiazol-3-amine derivatives as inhibitors of p70S6 kinase. Screening hits containing the 4-(benzimidazol-2-yl)-1,2,5-oxadiazol-3-ylamine scaffold were optimized for p70S6K potency and selectivity against related kinases. Structure-based design employing an active site homology model derived from PKA led to the preparation of benzimidazole 5-substituted compounds 26 and 27 as highly potent inhibitors (K-i < 1 nM) of p70S6K, with > 100-fold selectivity against PKA, ROCK and GSK3. (C) 2009 Elsevier Ltd. All rights reserved.
Chiacchiera, Stella M.; Singh, Joaquin O.; Anunziata, Jorge D., Journal of the Chemical Society. Perkin transactions II, 1987, p. 987 - 994
作者:Chiacchiera, Stella M.、Singh, Joaquin O.、Anunziata, Jorge D.、Silber, Juana J.