A process of preparing a quinolone carboxylic acid or its derivatives having Formula I, Ia, or IV, as shown herein, comprises using a starting quinolone that already has one or more desired substituents at one or more particular positions on the quinolone ring and preserving the orientation of such substituents throughout the synthesis. The present process comprises fewer steps than prior-art processes. The present process also can include a simple separation of a desired enantiomer of the quinolone carboxylic acid or its derivatives from the enantiomeric mixture. Pharmaceutical compositions comprising fluoroquinolones prepared by the present process can be used effectively against a variety of microbial pathogens.
一种制备喹诺
酮羧酸或其衍
生物的过程,其具有如下式I、Ia或IV,包括使用已经在
喹诺酮环上的一个或多个特定位置具有一个或多个所需取代基的起始
喹诺酮,并在合成过程中保留这些取代基的方向。该现有工艺比先前的工艺步骤更少。该现有工艺还可以包括从对映体混合物中简单分离所需的喹诺
酮羧酸或其衍
生物的所需对映体。由该现有工艺制备的
氟喹诺酮制剂可以有效地用于对抗各种微
生物病原体。