A fluoroquinoline derivative represented by general formula (1); wherein R₁ represents hydrogen or lower alkyl; R₂ represents hydrogen, optionally protected amino, optionally protected aminocarbonyl or optionally protected carboxyl; R₅ represents halogen which can be positioned on an arbitrary carbon atom, lower alkyl, optionally protected hydroxyl or R₂; R₆ represents lower alkyl; A represents CH₂, optionally protected nitrogen or oxygen; and n and m represent each an integer of 0 to 4, provided that n+m represents an integer of 1 to 4 and a salt thereof. These compounds have excellent antibacterial activities against both of gram-positive and negative bacteria, provide a high blood level through oral or parenteral adminitration, are lowly toxic and highly light-stable, and have a low cytotoxicity under irradiation with light and a high safety, thus being remarkably useful as medicines such as an antibacterial.
通式(1)代表的
氟喹啉衍
生物;其中 R₁ 代表氢或低级烷基;R₂ 代表氢、任选保护的
氨基、任选保护的
氨基羰基或任选保护的羧基;R₅ 代表可位于任意碳原子上的卤素、低级烷基、受任选保护的羟基或 R₂; R₆ 代表低级烷基; A 代表 CH₂、受任选保护的氮或氧;以及 n 和 m 分别代表 0 至 4 的整数,条件是 n+m 代表 1 至 4 的整数及其盐。这些化合物对革兰氏阳性菌和阴性菌都有很好的抗菌活性,通过口服或肠外给药可提供较高的血药浓度,毒性低,光稳定性高,在光照射下细胞毒性低,安全性高,因此可作为抗菌剂等药物使用。