Pyridonecarboxylic Acids as Antibacterial Agents. IX. Synthesis and Structure-Activity Relationship of 3-Substituted 10-(1-Aminocyclopropyl)-9-fluoro-7-oxo-2,3-dihydro-7H-pyrido(1,2,3-de)-1,4-benzoxazine-6-carboxylic Acids and Their 1-Thio and 1-Aza Analogues.
作者:Yozo TODO、Hiroyasu TAKAGI、Fumihiko IINO、Yoshikazu FUKUOKA、Masahiro TAKAHATA、Seiki OKAMOTO、Isamu SAIKAWA、Hirokazu NARITA
DOI:10.1248/cpb.42.2569
日期:——
A series of the title compounds listed in Chart 1 have been synthesized to study the effects of 3-alkyl substituents on the antibacterial potency and in vivo efficacy of 10-(1-aminocyclopropyl)-9-fluoro-7-oxo-2, 3-dihydro-7H-pyrido[1, 2, 3-de]-1, 4-benzoxazine-6-carboxylic acid and its 1-thio and 1-aza variants. Compound (S)-1, which proved most active in vitro against five representative gram-positive and gram-negative organisms, was assayed in vivo using Staphylococcus aureus and Pseudomonas aeruginosa mouse infection models. It exhibited an excellent in vivo efficacy, being superior to ofloxacin and ciprofloxacin, and was then assayed for convulsion-inducing activity, mammalian cell cytotoxicity, and topoisomerase II inhibition. The biological results showed that (S)-1 displayed antibacterial and toxicological advantages over ofloxacin and ciprofloxacin. Compound (S)-1 and its methanesulfonate showed high serum concentrations after oral and intravenous administrations to mice.
为了研究 3-烷基取代基对 10-(1-氨基环丙基)-9-氟-7-氧代-2, 3-二氢-7H-吡啶并[1, 2, 3-de]-1, 4-苯并恶嗪-6-羧酸及其 1-硫代和 1-氮杂变体的抗菌效力和体内疗效的影响,我们合成了图 1 所列的一系列标题化合物。化合物(S)-1 在体外对五种具有代表性的革兰氏阳性和革兰氏阴性菌具有最强的活性,并使用金黄色葡萄球菌和绿脓杆菌小鼠感染模型对其进行了体内试验。(S)-氧氟沙星的体内疗效极佳,优于氧氟沙星和环丙沙星,随后对其进行了惊厥诱导活性、哺乳动物细胞毒性和拓扑异构酶 II 抑制试验。生物学结果表明,与氧氟沙星和环丙沙星相比,(S)-1 具有抗菌和毒性优势。小鼠口服和静脉注射(S)-1化合物及其甲磺酸盐后,血清浓度较高。