Dérivés des acides 7-(1-azétidinyl)-1,4-dihydro-4-oxoquinoléine-3-carboxyliques, leur préparation et leur application en tant que médicaments
申请人:LABORATORIOS DEL DR. ESTEVE, S.A.
公开号:EP0324298B1
公开(公告)日:1992-12-23
US4927926A
申请人:——
公开号:US4927926A
公开(公告)日:1990-05-22
Derivatives of 7-(1-azetidinyl)-1,4-dihydro-4-oxo-3-quinolinecarboxylic
申请人:Laboratorios del Dr. Esteve S.A.
公开号:US04927926A1
公开(公告)日:1990-05-22
The present invention relates to new heterocyclic compounds, derivatives of 7-(1-azetidinyl)-1,4-dihydro-4-oxo-3-quinolinecarboxylic acids, characterized in that they correspond to formula (I) ##STR1## The invention also relates to the preparation of these compounds and their applications as medicines.
A series of novel antibacterial quinolones and naphthyridones has been prepared which contain 7-azetidinyl substituents in place of the usual piperazine or aminopyrrolidine groups. These azetidinyl derivatives were evaluated for in vitro activity by determining minimum inhibitory concentrations against a variety of bacteria. In vivo efficacy in the mouse infection model and blood levels in the mouse were determined for several compounds. The influence on the structure-activity relationships of varying substituents in the azetidine ring and at position 8 (CH, CF, CCl, N) and N-1 (ethyl, fluoroethyl, cyclopropyl, tert-butyl, 4-fluorophenyl, and 2,4-difluorophenyl) was also studied. Compounds with outstandingly broad-spectrum activity, particularly against Gram-positive organisms, improved in vivo efficacy, and high blood levels were identified in this work. 7-Azetidinyl-8-chloroquinolones were considered as warranting further development.