Synthesis and Antibacterial Activity of 1-(2-Fluorovinyl)-7-substituted-4-quinolone-3-carboxylic Acid Derivatives, Conformationally Restricted Analogues of Fleroxacin
2- to 32-fold more potent in vitroantibacterialactivity than the corresponding E-isomers E-15a-c and E-16a-c. Furthermore, since Z-15b showed in vitroantibacterialactivity and DNA gyrase inhibition comparable to that of 5, it was hypothesized that the conformation of Z-15b would be equivalent to the active conformer of 5. The results revealed that the antibacterial Z-1-(2-fluorovinyl)quinolone