Certain tricyclic pyrido[3,2,1-ij]cinnoline-8-carboxylates, useful as
申请人:Wakunaga Pharmaceutical Co., Ltd.
公开号:US05359066A1
公开(公告)日:1994-10-25
A compound represented by the following general formula: ##STR1## which is useful as an intermediate for production of a clinically excellent synthetic antibacterial, a salt thereof, and a process for producing the same. In said formula, R.sup.1 is a hydrogen atom or a carboxyl-protecting group; R.sup.2 is a hydrogen atom or a lower alkyl group; X.sup.1 is a hydrogen atom or a halogen atom; X.sup.2 is a halogen atom; X.sub.a.sup.5 is a hydrogen atom or a halogen atom; A is a methylene group; a group of >CH--COOR.sup.4, etc., in which R.sup.4, R.sup.5 and R.sup.6 each are a hydrogen atom or a carboxyl-protecting group; B is a methylene group or a carbonyl group; provided that both A and B must not be methylene groups at the same time.