Synthesis, biological evaluation and QSAR study of a series of substituted quinazolines as antimicrobial agents
作者:Vipul M. Buha、Dharmaraj N. Rana、Mahesh T. Chhabria、Kishor H. Chikhalia、Bhushan M. Mahajan、Pathik S. Brahmkshatriya、Nisha K. Shah
DOI:10.1007/s00044-012-0408-0
日期:2013.9
A novel series of 1-N-substituted-3-(4-(5-(pyridin-3-yl)-1,3,4-oxadiazol-2-ylthio)quinazolin-6-yl)urea/thiourea derivatives (6a–6r) and 1-N-substituted-3-(7-(4-methylpiperazin-1-yl)-4-(5-(pyridin-3-yl)-1,3,4-oxadiazol-2-ylthio)quinazolin-6-yl)urea/thiourea derivatives (14a–14s) were synthesized and screened for antimicrobial activity against Staphylococcus aureus, Bacillus subtilis, Pseudomonas aeruginosa
1 - N-取代的3-(4-(5-(吡啶-3-基)-1,3,4-恶二唑-2-基硫基)喹唑啉-6-基)脲/硫脲衍生物的新系列(6a –6r)和1- N-取代的3-(7-(4-甲基哌嗪-1-基)-4-(5-(吡啶-3-基)-1,3,4-恶二唑-2-基硫基)合成了喹唑啉-6-基)脲/硫脲衍生物(14a-14s),并筛选了对金黄色葡萄球菌,枯草芽孢杆菌,铜绿假单胞菌和大肠杆菌的抗菌活性。生物学结果表明,所合成的化合物在6.25至100μg/ mL的MIC值下具有针对被测微生物的广谱活性。化合物6r表现出广谱的活性,被发现对所有受测物种均具有活性。已对合成化合物进行了定量构效关系研究,以更好地了解负责抗菌活性的药效学特征。遗传函数近似技术用于识别影响生物活性的描述符。发现疏水性(AlogP98),电子(原子极化率)和拓扑(回转半径)描述符对活性有明显影响。发现生成的模型具有统计学意义(r 2 = 0