PROBLEM TO BE SOLVED: To provide 6-O-substituted ketolides with antibacterial activity, having acid stability and enhanced activity toward gram negative bacteria and macrolide resistant gram positive bacteria.SOLUTION: This invention provides 6-O-substituted erythromycin ketolide derivatives such as formula (II) and compositions comprising the compounds. [Y and Z together form a group X; X is ketone, hydroxyimino or the like; or, one of Y and Z is H and the other is hydrogen, hydroxy or the like; Ris H, hydroxy; Ris H or a hydroxy protective group; R is a substituted methyl group].
要解决的问题:提供具有抗菌活性的6-O-取代酮烯类化合物,具有酸稳定性,并对革兰氏阴性细菌和大环内酯耐药革兰氏阳性细菌具有增强活性。解决方案:本发明提供6-O-取代
红霉素酮烯类衍
生物,如式(II)所示,以及包含这些化合物的组合物。【Y和Z一起形成一个基团X;X是酮基,羟基
亚胺基或类似物;或者,Y和Z中的一个是H,另一个是氢,羟基或类似物;R是H,羟基;R是H或羟基保护基团;R是取代甲基基团】。