The present invention relates to an improved process for the preparation of quinolone based compounds of general formula (I) using intermediate compound of general formula (XII). Invention also provides an improved process for the preparation of compound of formula (I-a) using intermediate compound of formula (XII-a) and some novel impurities generated during process. Compounds prepared using this process can be used to treat anemia.
本发明涉及一种使用通式(XII)中间体化合物制备通式(I)喹诺
酮类化合物的改进工艺。 本发明还提供了一种利用通式(XII-a)的中间体化合物和工艺过程中产生的一些新型杂质制备通式(I-a)化合物的改进工艺。 使用该工艺制备的化合物可用于治疗贫血症。