The present invention relates to an improved process for the preparation of Gemifloxacin mesylate of formula (V). The present invention further provides novel intermediates of formula (II) and (IV), which are useful intermediates for the preparation of Gemifloxacin mesylate of formula (V).
wherein R
1
is linear or branched chain alkyl group having 1-3 carbon atoms.
本发明涉及一种改进的制备公式(V)的Gemifloxacin
甲磺酸盐的过程。本发明还提供了公式(II)和(IV)的新型中间体,它们是制备公式(V)的Gemifloxacin
甲磺酸盐的有用中间体。其中R1是具有1-3个碳原子的线性或支链烷基。