structure, featuring the Joullié-Ugi three-component reaction, was developed. This multicomponent reaction and a related multicomponent reaction, the Ugi four-component reaction, were used to prepare analogs that were designed using the principles of conformational analysis. These cyclic acyldepsipeptides were tested for their activity against drug-resistant, clinical isolates of Staphylococci and Enterococci
一类被称为Enepteptins的环状环肽肽抗生素最近因其对多种耐药性细菌的活性而引起了广泛关注,其中包括耐
甲氧西林的
金黄色葡萄球菌和耐
万古霉素的粪肠球菌。这些抗生素通过其新颖的作用机制进一步区别于其中,它们结合并解除了对细胞质
蛋白酶ClpP的严格控制的活性。尽管
天然产物的药理学性能较差,但一种合成的衍
生物,名为acyl
DEPsipeptide 4(A
DEP 4),在体外和小鼠细菌感染模型中均显示出显着的抗菌活性。开发了以Joullié-Ugi三组分反应为特征的A
DEP 4肽内酯核心结构的新途径。该多组分反应和相关的多组分反应Ugi四组分反应被用来制备类似物,所述类似物是利用构象分析原理设计的。测试了这些环状酰基肽肽对抗药性,临床分离株的活性。葡萄球菌和肠球菌。一种用四甲基
哌酸酯代替
哌酸酯的A
DEP 4类似物,其对肠球菌的体外抗菌活性比母体化合物高四倍。