申请人:Daiichi Pharmaceutical Co., Ltd.
公开号:US05463053A1
公开(公告)日:1995-10-31
An optically active pyridobenzoxazine derivative represented by formula (I): ##STR1## wherein R.sup.1 and R.sup.2 wherein R.sup.1 and R.sup.2, which may be the same or different, each represent an alkyl group having from 1 to 6 carbon atoms, a halogenated alkyl group having from 1 to 6 carbon atoms, a hydroxyalkyl group having from 1 to 6 carbon atoms, or an alkoxymethyl group having from 2 to 7 carbon atoms; R.sup.3 represents a hydrogen atom, an alkyl group having from 1 to 6 carbon atoms, an acyl group having from 2 to 7 carbon atoms, a halogen-substituted or unsubstituted alkyloxycarbonyl group having from 2 to 7 carbon atoms, a phenylmethyloxycarbonyl group, or a phenylmethyloxycarbonyl group whose phenyl moiety is substituted with a halogen atom, a nitro group, or a methoxy group; R.sup.4 represents a methyl or fluoromethyl group which is in a .beta.-configuration; R.sup.5 represents a hydrogen atom, an amino group, a hydroxyl group, a methyl group, or a halogen atom; and X represents a fluorine atom or a chlorine atom, and a salt thereof are disclosed. These compounds exhibit potent antimicrobial activity with broad antimicrobial spectra and improved lipophilic properties.
公式(I)所表示的旋光性吡啶并苯并氧嗪衍生物:##STR1## 其中R.sup.1和R.sup.2,可以相同也可以不同,分别表示具有1-6个碳原子的烷基、具有1-6个碳原子的卤代烷基、具有1-6个碳原子的羟基烷基或具有2-7个碳原子的烷氧甲基;R.sup.3表示氢原子、具有1-6个碳原子的烷基、具有2-7个碳原子的酰基、具有2-7个碳原子的卤代或未卤代的烷氧羰基、苯甲氧羰基或其苯基部分被卤原子、硝基或甲氧基取代的苯甲氧羰基;R.sup.4表示处于β-构型的甲基或氟甲基;R.sup.5表示氢原子、氨基、羟基、甲基或卤原子;X表示氟原子或氯原子,以及它们的盐。这些化合物具有广谱的抗微生物活性和改善的亲脂性能。