Synthesis, Antibacterial Activity and Quantum-Chemical Studies of Novel 2-Arylidenehydrazinyl-4-arylthiazole Analogues
作者:Mohammad Sayed Alam、Lijun Liu、Yong-Eok Lee、Dong-Ung Lee
DOI:10.1248/cpb.59.568
日期:——
A new series of 2-arylidenehydrazinyl-4-arylthiazole derivatives (2a—k) was designed and synthesized through a rapid, simple, and efficient methodology in excellent isolated yield. These compounds were screened for in vitro antimicrobial activities against eight bacteria, e.g. Bacillus cereus, Staphylococcus aureus, Bacillus subtilis, Bacillus megaterium, Pseudomonas aeruginosa, Shigella dysenteriae, Salmonella typhi, Escherichia coli, and three fungi e.g. Aspergillus oryzae, Candida albicans, and Saccharomyces cerevis. The results indicate that some of the compounds exhibit strong antibacterial activity, depending on the bacterial strain, but show virtually no antifungal activity. The structure–antibacterial activity relationships were studied using some physicochemical and quantum-chemical parameters with the ab initio Hartree–Fock model at the RHF/6-31G level of theory. A good qualitative correlation between predicted lipophilic parameters and antibacterial activity has been found.
通过快速、简单且高效的方法,设计并合成了一系列新的2-芳亚甲基酰肼-4-芳基噻唑衍生物(2a—k),这些化合物在极佳的分离产率下制得。我们对这些化合物进行了体外抗菌活性筛选,针对八种细菌(如蜡样芽孢杆菌、金黄色葡萄球球菌、枯草芽孢杆菌、巨大芽孢杆菌、铜绿假单胞菌、痢疾志贺菌、伤寒沙门菌、大肠埃希菌)和三种真菌(如米曲霉、白色念珠菌、酿酒酵母)进行了测试。结果显示,部分化合物根据细菌株的不同,展现出强烈的抗菌活性,但几乎不具备抗真菌活性。我们采用从头计算Hartree-Fock模型在RHF/6-31G理论水平上,利用一些物理化学和量子化学参数,研究了结构与抗菌活性之间的关系。发现预测的亲脂性参数与抗菌活性之间存在良好的定性相关性。