Substituted benzoxazinorifamycin derivative, process for preparing the same and antibacterial agent containing the same
申请人:KANEGAFUCHI KAGAKU KOGYO KABUSHIKI KAISHA
公开号:EP0333176A2
公开(公告)日:1989-09-20
A rifamycin derivative having the formula (I):
wherein R¹ is hydrogen atom, methyl group or ethyl group, R² is an alkyl group having 1 to 4 carbon atoms, and A is a group having the formula:
in which n is an integer of 3 to 5, or a group having the formula:
in which R³ is an alkyl group having 1 to 5 carbon atoms; or a salt thereof. The rifamycin derivative (I) exhibits a strong antibacterial activity against Gram-positive bacteria and acid-fast bacteria, and also exhibits a strong antibacterial activity against tubercle bacilli.
具有式(I)的利福霉素衍生物:
其中 R¹ 是氢原子、甲基或乙基,R² 是具有 1 至 4 个碳原子的烷基,A 是具有式(I)的基团:
其中 n 是 3 至 5 的整数,或 A 是具有以下式子的基团
其中 R³ 是具有 1 至 5 个碳原子的烷基;或其盐。利福霉素衍生物(I)对革兰氏阳性菌和耐酸细菌具有很强的抗菌活性,对结核杆菌也具有很强的抗菌活性。