Design, synthesis, and biological evaluation of novel benzimidazole derivatives and their interaction with calf thymus DNA and synergistic effects with clinical drugs
With the expectation to find out new anti-gastric cancer agents with high efficacy and selectivity, a series of novel tertiary sulfonamide derivatives were synthesized and the anti-cancer activity was studied in three selected cancer cell lines (MGC-803, PC-3, MCF-7) in vitro. Some of the synthesized compounds could significantly inhibit the proliferation of these tested cancer cells and were more
Exploring electronic structure, and substituent effect of some biologically active benzimidazole derivatives: Experimental insights and DFT calculations
作者:Ola R. Shehab、Ahmed M. Mansour
DOI:10.1016/j.molstruc.2020.128996
日期:2021.1
groups (X = 4 OCH3 (1), 4 CH3 (2), H (3), 4 Cl (4), and 4 Br (5)) on the para-position of the phenyl substituent was prepared, characterized and screened for their potential antimicrobial activity against some microbes. The substituenteffect on the spectroscopic data (vibrational modes and NMR resonances) is well established by fitting with the Hammett constant. The unsubstituted derivative 4 exhibited
Light-activated cytotoxicity of dicarbonyl Ru(<scp>ii</scp>) complexes with a benzimidazole coligand towards breast cancer
作者:Nourhan M. Ibrahim、Rabaa M. Khaled、Mohamed A. Ragheb、Krzysztof Radacki、Ahmad M. Farag、Ahmed M. Mansour
DOI:10.1039/d1dt02296b
日期:——
and IR spectra upon illumination at 365 nm. A noticeable decrease in the intensities of the two characteristic ν(CO) modes for Ru(CO)II2 species, and the growth of two new bands for the mono-carbonyl species and free CO, were the main features of the photolysis profiles. The cytotoxicity of the complexes towards breast cancer (MCF-7) cells was assessed with and without illumination at 365 nm. All the
[RuCl 2 (CO) 2 ] n和 1 H -苯并咪唑-2-基甲基-( N -苯基)胺配体 (L R ) 之间的反应,苯环上有各种给电子和吸电子取代基 (R = H、4-CH 3 、4-Cl、4-COOCH 3和3-COOCH 3 )提供通式[RuCl 2 (CO) 2 L R ]的暗稳定可光活化一氧化碳前药。通过监测 365 nm 照射下的电子光谱和红外光谱来检查 CO 分子从 Ru( II ) 化合物中的释放。两个特征ν (C Ru(CO) II 2物质的 O) 模式以及单羰基物质和游离 CO 的两个新谱带的增长是光解曲线的主要特征。在 365 nm 照射和不照射的情况下评估了复合物对乳腺癌 (MCF-7) 细胞的细胞毒性。除 4-COOCH 3基团外的所有配合物 (IC 50 = 45.08 ± 3.5 μM) 在黑暗条件下都是无毒的。 光照后,所有化合物按以下顺序获得细胞毒性:H
Evaluation of cytotoxic properties of two fluorescent <i>fac</i>-Re(CO)<sub>3</sub> complexes bearing an <i>N</i>,<i>N</i>-bidentate benzimidazole coligand
作者:Ahmed M. Mansour、Nourhan M. Ibrahim、Ahmad M. Farag、Mahmoud T. Abo-Elfadl
DOI:10.1039/d2ra05992d
日期:——
Tricarbonyl Re(i) complexes are piled in the intercellular junction and diffused inside the cells. This led to DNA fragmentations and both apoptotic and necrotic cell death.
三羰基 Re(i) 复合物堆积在细胞间的连接处,并扩散到细胞内部。这导致 DNA 断裂以及细胞凋亡和坏死。
A unique one-pot reaction via CC cleavage from aminomethylene benzimidazoles to access benzimidazolones with wide potentiality
A unique one-pot reaction via C-C cleavage from aminomethylene benzimidazoles with commercial halides to access novel benzimidazolones is reported for the first time. The previously unexploited transformation is able to perform smoothly in the presence of commercial potassium carbonate, while the stronger inorganic bases or organic amines as catalysts are not favorable to the transformation. Significant influential factors including base, temperature, solvent, water content, and molar ratio of substrates to this reaction are investigated, and possibly mechanistic consideration is also discussed. Some synthesized benzimidazolones were evaluated and exhibited better bioactivities against tested strains than clinical drugs chloromycin, norfloxacin, and fluconazole. (C) 2014 Elsevier Ltd. All rights reserved.