Process for
6,7-dihydro-9-fluoro-5-methyl-1-oxo-1H,5H-benzo(ij)quinolizine-2-carboxy
lic acid
    1.
    发明授权
    Process for 6,7-dihydro-9-fluoro-5-methyl-1-oxo-1H,5H-benzo(ij)quinolizine-2-carboxy lic acid 失效
    6,7-二氢-9-氟-5-甲基-1-氧代-1H,5H-苯并(ij)喹嗪-2-羧酸的方法

    公开(公告)号:US4301288A

    公开(公告)日:1981-11-17

    申请号:US122599

    申请日:1980-02-19

    摘要: An improved process for preparing the antimicrobial compound flumequine is disclosed. The first step of the process comprises reacting 4-fluoroaniline with crotonaldehyde under acidic conditions at a temperature between 50.degree. and 60.degree. C. In the second step, the product of the first step is slowly added to a refluxing solvent which forms a binary azeotrope with water and has a boiling point between 90.degree. and 120.degree. C. to provide a mixture of 6-fluoroquinaldine and 6-fluorotetrahydroquinaldine. This mixture is then treated with base in the presence of weak acid followed by reducing to provide 6-fluorotetrahydroquinaldine. This compound is then treated according to known procedures to form flumequine.

    摘要翻译: 公开了一种制备抗微生物化合物氟菊花的改进方法。 该方法的第一步包括在酸性条件下在50至60℃的温度下使4-氟苯胺与巴豆醛反应。在第二步中,将第一步的产物缓慢加入回流溶剂中,形成二元共沸物 用水,沸点在90〜120℃,得到6-氟喹哪啶和6-氟四氢喹喔啉的混合物。 然后将该混合物在弱酸存在下用碱处理,然后还原,得到6-氟四氢喹啉。 然后根据已知方法处理该化合物以形成氟欧喹。