Antibacterial activity evaluation of pleuromutilin derivatives with 4(3H)-quinazolinone scaffold against methicillin-resistant Staphylococcus aureus
作者:Yu Deng、Yang Zhang、Xiao-Hu Chen、Cheng-Hong Li
DOI:10.1016/j.ejmech.2022.114960
日期:2023.1
Pleuromutilin, a naturally occurring product with moderate antibacterial activity, has a unique structure that has attracted great efforts to modify its scaffold to obtain lead compounds. Herein, we report the synthesis of a series of novel pleuromutilin derivatives with a scaffold of 4(3H)-quinazolinone or its analogues at the C-14 side chain and investigated their in vitro activity against Staphylococcus aureus
日益增长的抗生素耐药性正在引发医疗保健危机,导致迫切需要新的抗生素来应对严重的医院和社区感染。截短侧耳素是一种具有中等抗菌活性的天然产物,其独特的结构引起了人们对对其支架进行修饰以获得先导化合物的巨大努力。在此,我们报道了一系列在C-14侧链上具有4( 3H )-喹唑啉酮或其类似物支架的新型截短侧耳素衍生物的合成,并研究了它们对金黄色葡萄球菌、表皮葡萄球菌以及革兰氏阴性菌的体外活性。 -阴性细菌(大肠杆菌和沙门氏菌肠亚种。肠白痢)。构效关系(SAR)研究表明,4( 3H )-喹唑啉酮苯环上的取代基对于提高抗菌活性的作用不如取代位置重要,而4(3H)-喹唑啉酮N-3位上的取代基对提高抗菌活性的作用并不重要。 H )-喹唑啉酮对疗效有很大影响。用其他环(吡啶、吡咯、噻吩或环戊基)取代4(3 H )-喹唑啉酮的苯部分也显示出很高的抗菌功效,这意味着苯环对于发挥强大的抗菌性能来说是可有可无的。体外