AbstractThe prevalence of germs that are resistant to many antibiotics is rising rapidly the world over. There is a large group of researchers actively looking for better medicines. Here, we designed two series of hydrazonal and indeno[1,2‐b]pyridin‐5‐one bearing hydrazone and azo‐groups to test their antimicrobial activity. Molecular structures of all derivatives were assured based on their spectral data and elemental analyses. Results of the antimicrobial activity of the tested hydrazone and azo compounds showed promising potential for several derivatives. The minimum inhibitory concentrations (MICs) of hydrazones 4a‐h and 6a‐g displayed good antibacterial reactivities with a range of 3.91–250 μg/mL and moderate antifungal activity with a range of 15.6–500 μg/mL. The most promising hydrazone 4f and azo‐6a compounds demonstrated MIC values against Streptococcus faecalis and Escherichia coli equal to 3.91 and 7.81 μg/mL, respectively. Moreover, azo compound 6a showed MIC value equal to 3.91 μg/mL against Enterobacter cloacae species. Additionally, derivative 4f exhibited a significant inhibitory profile against the E. coli gyrase A enzyme (IC50 = 5.53 μg/mL). On the other hand, compound 6a (IC50 14.05 μg/mL) exhibited the lowest DNA gyrase inhibitory activity as compared to compounds 4f and reference standard drug novobiocin, IC50 5.53 and 1.88 μg/mL, respectively. Pharmacokinetic and pharmacodynamic profiles and molecular docking studies for the two most promising molecules 4f and 6a were computed and revealed that both compounds have good ADME profiles and high binding affinity to DNA gyrase binding site.
摘要 对许多抗生素具有抗药性的病菌在全世界迅速增加。一大批研究人员正在积极寻找更好的药物。在此,我们设计了两个带有腙和偶氮基团的肼基和茚并[1,2-b]吡啶-5-酮系列,以测试它们的抗菌活性。根据光谱数据和元素分析,确定了所有衍生物的分子结构。测试的腙和偶氮化合物的抗菌活性结果表明,几种衍生物具有很好的潜力。腙 4a-h 和腙 6a-g 的最低抑菌浓度 (MIC) 在 3.91-250 μg/mL 范围内显示出良好的抗菌活性,在 15.6-500 μg/mL 范围内显示出中等的抗真菌活性。最有前景的腙 4f 和偶氮化合物 6a 对粪链球菌和大肠杆菌的 MIC 值分别为 3.91 和 7.81 μg/mL。此外,偶氮化合物 6a 对肠杆菌的 MIC 值为 3.91 μg/mL。此外,衍生物 4f 对大肠杆菌回旋酶 A 酶具有显著的抑制作用(IC50 = 5.53 μg/mL)。另一方面,与化合物 4f 和参考标准药物新生物素(IC50 分别为 5.53 和 1.88 μg/mL)相比,化合物 6a(IC50 为 14.05 μg/mL)的 DNA 回旋酶抑制活性最低。计算了最有前景的两个分子 4f 和 6a 的药代动力学和药效学特征,并进行了分子对接研究,结果表明这两个化合物具有良好的 ADME 特征,与 DNA gyrase 结合位点的结合亲和力高。