NOVEL QUINOLONE DERIVATIVES, PREPARATION PROCESSES THEREOF, AND ANTIBACTERIAL AGENTS CONTAINING THE SAME

摘要

Antibacterial quinolone derivatives represented by the following formula [I] and salts thereof are disclosed. wherein R<1> means a hydrogen atom or a carboxyl-protecting group; R<2> denotes a hydrogen or halogen atom or a hydroxyl, lower alkoxyl, amino, aralkylamino, or mono- or di-(lower alkyl)amino group; A represents an oxygen or sulfur atom or N-R<3> in which R<3> is a hydrogen atom or an amino-protecting group; X is a hydrogen or halogen atom; Y means a nitrogen atom or C-R<4> in which R<4> is a hydrogen or halogen atom or a lower alkyl or lower alkoxyl group; and Z denotes a halogen atom or a substituted or unsubstituted heterocyclic group having at least one nitrogen atom as a hetero atom.