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噁唑衍生物:##STR1##其中R.sup.1和R.sup.2,它们可以相同也可以不同,分别表示具有1至6个碳原子的烷基,具有1至6个碳原子的卤代烷基,具有1至6个碳原子的羟基烷基或具有2至7个碳原子的烷氧甲基基团;R.sup.3表示氢原子,具有1至6个碳原子的烷基,具有2至7个碳原子的酰基,具有2至7个碳原子的卤代或未卤代的烷氧羰基基团,苯甲氧羰基基团或其苯基部分被卤原子,硝基或甲氧基取代的苯甲氧羰基基团;R.sup.4表示处于.beta.构型的甲基或氟甲基基团;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,并公开了其盐。这些化合物表现出具有广泛抗微生物谱和改善的亲脂性能的强效抗微生物活性。