Discovery of membrane active benzimidazole quinolones-based topoisomerase inhibitors as potential DNA-binding antimicrobial agents
摘要:
A series of novel benzimidazole quinolones as potential antimicrobial agents were designed and synthesized. Most of the prepared compounds exhibited good or even stronger antimicrobial activities in comparison with reference drugs. The most potent compound 15m was membrane active and did not trigger the development of resistance in bacteria. It not only inhibited the formation of biofilms but also disrupted the established Staphylococcus aureus and Escherichia coli biofilms. It was able to inhibit the relaxation activity of E. coli topoisomerase IV at 10 mu M concentration. Moreover, this compound also showed low toxicity against mammalian cells. Molecular modeling and experimental investigation of compound 15m with DNA suggested that this compound could effectively bind with DNA to form a steady 15m-DNA complex which might further block DNA replication to exert the powerful bioactivities. (C) 2016 Elsevier Masson SAS. All rights reserved.
d-Glucose has been identified as an efficient C1 synthon in the synthesis of benzimidazoles from o-phenylenediamines via an oxidative cyclization strategy. Isotopic studies with 13C6-d-glucose and D2O unambiguously confirmed the source of methine. The notable features of this method include the following: broad functional group tolerance, a biorenewable methine source, excellent reaction yields, a
d-葡萄糖已被确定为通过氧化环化策略由邻苯二胺合成苯并咪唑的有效C1合成子。用13 C 6 - d-葡萄糖和D 2 O进行的同位素研究明确证实了次甲基的来源。该方法的显着特征包括:宽泛的官能团耐受性,可生物再生的次甲基来源,优异的反应收率,较短的反应时间,水作为环境友好的溶剂以及以克为单位的维生素B 12组分的合成。
The Synthesis of Benzimidazoles and Quinoxalines from Aromatic Diamines and Alcohols by Iridium-Catalyzed Acceptorless Dehydrogenative Alkylation
作者:Toni Hille、Torsten Irrgang、Rhett Kempe
DOI:10.1002/chem.201400400
日期:2014.5.5
N‐heteroaromatics with many applications in pharmaceutical and chemical industry. Here, the synthesis of both classes of compounds starting from aromatic diamines and alcohols (benzimidazoles) or diols (quinoxalines) is reported. The reactions proceed through acceptorless dehydrogenative condensation steps. Water and two equivalents of hydrogen are liberated in the course of the reactions. An Ir complex stabilized
苯并咪唑和喹喔啉是重要的N-杂芳族化合物,在制药和化学工业中有许多应用。在此,报道了从芳族二胺和醇(苯并咪唑)或二醇(喹喔啉)开始的两类化合物的合成。反应通过无受体的脱氢缩合步骤进行。在反应过程中释放出水和两当量的氢。由三齿P ^ N ^ P配体N 2,N 6-双(二异丙基膦基)吡啶-2,6-二胺稳定的Ir配合物显示出两个反应的最高催化活性。
Sustainable Synthesis of 2‐Hydroxymethylbenzimidazoles using D‐Fructose as a C
<sub>2</sub>
Synthon
carbohydrate has been identified as an environmentally benign C2 synthon in the preparation of synthetically useful 2-hydroxymethylbenzimidazole derivatives by coupling with 1,2-phenylenediamines. The pivotal features of this method include metal-free conditions, short time, good functional group tolerance, gram scale feasibility and the synthesis of benzimidazole fused 1,4-oxazine.
D-果糖是一种生物质衍生的碳水化合物,在通过与 1,2-苯二胺偶联制备合成有用的 2-羟甲基苯并咪唑衍生物时,已将其鉴定为环境无害的 C 2合成子。该方法的关键特征包括无金属条件、时间短、官能团耐受性好、克级可行性和苯并咪唑稠合 1,4-恶嗪的合成。
Construction of Druglike 2-Amido Benzo[<i>d</i>]imidazole Analogues via Desulfurative Cyclization of Thiourea Intermediate Resin on Solid-Phase
作者:Hyun-Jeong Ryu、Seung-Ju Yang、Gee-Hyung Lee、Young-Dae Gong
DOI:10.1021/acscombsci.8b00004
日期:2018.5.14
A 2-amido benzo[d]imidazole library has been constructed by solid-phase synthesis. The key step of this solid-phase synthesis involves the preparation of polymer-bound 2-amino benzo[d]imidazole resin through desulfurative cyclization of thiourea resin using 2-chloro-1,3-dimethylimidazolinium chloride and N,N-diisopropylethylamine in dichloromethane (DCM), and the resin is then functionalized by acylation
通过固相合成已经构建了2-氨基苯并[ d ]咪唑文库。该固相合成的关键步骤涉及使用2-氯-1,3-二甲基咪唑啉鎓氯化物和N,N-二异丙基乙胺的二氯甲烷溶液,通过硫脲树脂的脱硫环化反应,制备与聚合物结合的2-氨基苯并[ d ]咪唑树脂。 (DCM),然后通过在2-胺位置上进行酰化将树脂官能化,得到2-酰胺基苯并[ d ]咪唑树脂。在具有p -I或m -NO 2的2-酰胺基苯并[ d ]咪唑树脂的情况下,通过Suzuki / Sonogashira-偶联将树脂进一步官能化(p -I)还原为伯胺(m -NO 2),然后进行酰化。最后,通过用三氟乙酸和DCM的混合物处理,将官能化的2-酰胺基-苯并[ d ]咪唑树脂从聚合物载体上裂解下来。结果,我们以高收率和良好的纯度获得了2-酰胺基苯并[ d ]咪唑类似物。
Discovery of Benzimidazole-Quinolone Hybrids as New Cleaving Agents toward Drug-Resistant <i>Pseudomonas aeruginosa</i>
DNA
作者:Ya-Nan Wang、Rammohan R. Yadav Bheemanaboina、Wei-Wei Gao、Jie Kang、Gui-Xin Cai、Cheng-He Zhou
DOI:10.1002/cmdc.201700739
日期:2018.5.23
new potential antimicrobial agents were designed and synthesized. Bioactive assays indicated that some of the prepared compounds exhibited potent antibacterial and antifungalactivities. Notably, 2‐fluorobenzyl derivative5 b (ethyl 7‐chloro‐6‐fluoro‐1‐[[1‐[(2‐fluorophenyl)methyl]benzimidazol‐2‐yl]methyl]‐4‐oxo‐quinoline‐3‐carboxylate) showed remarkable antimicrobial activity against resistant Pseudomonas