Synthesis and Antibacterial Activity of 1-(2-Fluorovinyl)-7-substituted-4-quinolone-3-carboxylic Acid Derivatives, Conformationally Restricted Analogues of Fleroxacin
作者:Yoshikazu Asahina、Kazuhiko Iwase、Fujio Iinuma、Masaki Hosaka、Takayoshi Ishizaki
DOI:10.1021/jm0402061
日期:2005.5.1
2- to 32-fold more potent in vitro antibacterial activity than the corresponding E-isomers E-15a-c and E-16a-c. Furthermore, since Z-15b showed in vitro antibacterial activity 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
新颖的1-(2-氟乙烯基)-4-喹诺酮-3-羧酸衍生物Z-15a-c,E-15a-c,Z-16a-c和E-16a-c,是氟沙星的构象受限类似物(合成5),并评价其体外抗菌活性。将2-氟-2-[(4-甲氧基苯基)亚磺酰基]乙基的脱氢硫烯基化用作在N-1位上构建2-氟乙烯基的关键步骤。显然,Z-异构体Z-15a-c和Z-16a-c在体外的抗菌活性比相应的E-异构体E-15a-c和E-16a-c高出2-3倍。此外,由于Z-15b的体外抗菌活性和DNA促旋酶抑制作用与5相当,因此可以推测Z-15b的构象与5的活性构象体相同。