申请人:ZAIDAN HOJIN BISEIBUTSU KAGAKU KENKYU KAI
公开号:EP0259014A2
公开(公告)日:1988-03-09
As new compounds are now provided 5-deoxy-5-fluorokanamycin B, 5,3'-dideoxy-5-fluorokanamycin B, 5,4'- dideoxy-5-fluorokanamycin B and 5,3',4'-trideoxy-5-fluorokanamycin B as well as 1-N-(3-amino-2-hydrox- ypropionyl)-or 1-N-(4-amino-2-hydroxybutyryl)-derivatives thereof which are all useful as antibacterial agents and exhibit improved antibacterial activities. These new compounds may be produced by synthetic processes starting from an appropriately N,O-protected 5-epi-kanamycin B, 3'-deoxy-5-epi-kanamycin B, 4'-deoxy-5-epi-kanamycin B or 3',4'-dideoxy-5-epi-kanamycin B derivative which is now prepared by a combination of reaction steps.
现在提供的新化合物有 5-脱氧-5-氟卡那霉素 B、5,3'-二脱氧-5-氟卡那霉素 B、5,4'-二脱氧-5-氟卡那霉素 B 和 5,3'、4'-三脱氧-5-氟卡那霉素 B 及其 1-N-(3-氨基-2-羟基丙酰基)-或 1-N-(4-氨基-2-羟基丁酰基)-衍生物,它们都是有用的抗菌剂,并显示出更好的抗菌活性。这些新化合物可通过合成工艺制得,其起始原料为适当的 N,O 保护的 5-表卡那霉素 B、3'-脱氧-5-表卡那霉素 B、4'-脱氧-5-表卡那霉素 B 或 3',4'-双脱氧-5-表卡那霉素 B 衍生物,这些衍生物现在是通过反应步骤的组合制备的。