申请人:Daiichi Pharmaceutical Co., Ltd.
公开号:US05696132A1
公开(公告)日:1997-12-09
Quinolone derivatives are known as synthetic antimicrobial agents having a condensed pyridonecarboxylic acid skeleton, and those having substituents on various replaceable positions of said skeleton are known. In particular, if diastereomers exist, there are 4 or more kinds of stereoisomers. A mixture of diastereomers is a mixture of isomers having different physical properties and is difficult to apply as a drug as such. The present invention provides an antimicrobial 1-(1,2-cis-2-fluorocyclopropyl)-substituted quinolone derivative represented by formula I shown below which, although involving diastereomers, consists of a single stereoisomer. ##STR1## wherein R.sup.1 represents a methyl group, a difluoromethyl group, etc.; R.sup.2 represents a saturated nitrogen-containing heterocyclic group; A represents C--X.sup.3 or a nitrogen atom; X.sup.1 and X.sup.2 each represents a halogen atom; and X.sup.3 and Z represent a hydrogen atom, etc.
喹诺酮衍生物被称为合成抗微生物药剂,具有紧凑的吡啶羧酸骨架,该骨架的各个可替代位置上带有取代基的衍生物是已知的。特别是,如果存在对映异构体,则有4种或更多种立体异构体。对映异构体的混合物是具有不同物理性质的异构体的混合物,很难作为药物直接应用。本发明提供了一种抗微生物1-(1,2-顺-2-氟环丙基)-取代喹诺酮衍生物,其化学式如下所示,尽管涉及对映异构体,但由单一立体异构体组成。其中R.sup.1代表甲基、二氟甲基等;R.sup.2代表饱和含氮杂环基团;A代表C--X.sup.3或氮原子;X.sup.1和X.sup.2分别代表卤原子;X.sup.3和Z代表氢原子等。