1-氨基-6-氟-1,4-二氢-4-氧代-7-(取代)哌嗪基-3-喹啉羧酸及其衍生物的合成与抗菌活性

SYNTHESIS AND ANTIBACTERIAL ACTIVITIES OF 1-AMINO-6-FLUORO-1,4-DIHYDRO-4-OXO-7-(SUBSTITUTED) PIPERAZINYL-3-QUINOLINECARBOXYLIC ACIDS AND THEIR DERIVATIVES

近年来,氟喹诺酮类抗菌药物的研究发展十分迅速。早期的构效关系研究表明,N-1位取代基对抗菌活性至关重要,如在N-1位引入氨基,可增加亲水性,口服吸收好,药代动力学性质得到改善(如氨氟哌酸)。Chu等发现N-1位苯环的引入亦有很好的抗菌活性和优良的药代动力学性质(如双氟哌酸),这可能是由于苯环与喹诺酮母环共轭,产生π-电子效应从而增强了生物活性与组织的分布与吸收。

The title compounds 6～24 were obtained by the reaction of 5 with corresponding benzaldehydes. 5 wes prepared with ethyl 7-chloro-6-fluoro-1, 4-dihydro-4-oxo-3-quinolinecarboxylate by hydrolysis, amination and condensation with piperazine. Anti—bacterical activities of 5～24 were tested in vitro.