Synthesis and antibacterial activities of novel dihydrooxazine and dihydrothiazine ring-fused tricyclic quinolonecarboxylic acids: 9-Fluoro-3-methylene-10-(4-methylpiperazin-1-yl)-7-oxo-2,3-dihydro-7<i>h</i>-pyrido[1,2,3-<i>de</i>][1,4]benzoxazine-6-carboxylic acid and its 1-thia congener
作者:Tetsuo Okada、Teruji Tsuji、Tadahiko Tsushima、Tadashi Yoshida、Shinzo Matsuura
DOI:10.1002/jhet.5570280438
日期:1991.6
A new synthetic method was developed to obtain two novel tricyclic quinolonecarboxylic acids, 9-fluoro-3-methylene-10-(4-methylpiperazin-1-yl)-7-oxo-2,3-dihydro-7H-pyrido[1,2,3-de][1,4]benzoxazine-6-carboxylic acid (2) and its 1-thia congener 3. The method involves the key intermediate of an oxetane derivative and its cleavage with acids. Evaluation of the antibacterial activities showed that 2 and
一种新的合成方法的开发是为了获得两个新的三环喹诺酮羧酸,9-氟-3-亚甲基-10-(4-甲基哌嗪-1-基)-7-氧代-2,3-二氢-7- ħ -吡啶并[1 ,2,3 -de ] [1,4]苯并恶嗪-6-羧酸(2)及其1-硫杂同源物3。该方法涉及氧杂环丁烷衍生物的关键中间体及其被酸裂解的过程。抗菌活性的评估表明,2和3在体外对革兰氏阳性和革兰氏阴性生物均优异,其效果与氧氟沙星相当或仅略低于氧氟沙星。在小鼠的实验性全身感染中,化合物2表现出比氧氟沙星明显更高的活性,特别是在抵抗大肠杆菌引起的感染方面。