Studies on pyridonecarboxylic acids. 1. Synthesis and antibacterial evaluation of 7-substituted-6-halo-4-oxo-4H-[1,3]thiazeto[3,2-a]quinoline-3-carboxylic acids
作者:Jun Segawa、Masahiko Kitano、Kenji Kazuno、Masato Matsuoka、Ichiro Shirahase、Masakuni Ozaki、Masato Matsuda、Yoshifumi Tomii、Masahiro Kise
DOI:10.1021/jm00103a011
日期:1992.12
[1,3]thiazeto[3,2-a]quinoline-3-carboxylic acids and their esters were prepared and evaluated for antibacterial activity. The derivatives with a hydrogen or methyl group at C-1, fluorine at C-6, and piperazinyl or 4-methyl-1-piperazinyl group at C-7 showed superior in vitro antibacterial activity, and the derivatives with 4-methyl-1-piperazinyl group at C-7 had potent in vivo activity. Compound 29a
制备了一系列的[1,3]噻唑并[3,2-a]喹啉-3-羧酸及其酯,并对其抗菌活性进行了评估。在C-1处具有氢或甲基,在C-6处具有氟和在C-7处具有哌嗪基或4-甲基-1-哌嗪基的衍生物显示出优异的体外抗菌活性,而具有4-甲基-1的衍生物C-7处的哌嗪基具有强大的体内活性。化合物29a(NM394)表现出优异的体外抗菌活性和低毒性,但从胃肠道吸收不良。发现化合物29ee(NM441),一种29a的N-[(5-甲基-2-氧代-1,3-二氧四环-4-基)甲基]衍生物,具有良好的药代动力学特性和口服活性,优于实验动物中的环丙沙星。