The present invention provides a process for preparing quinolonecarboxylic acid derivatives having the formula (I):
wherein R1 is H, halogen, or amino; R2 is halogen; R3 is H, halogen, C1-4 alkoxyl, or CN; R4 is selected from the group consisting of C3-6cycloalkyl, C1-4alkyl, C1-4alkoxyC1-4alkyl, and C1-4alkylaminoC1-4alkyl. The invention also provides new acetophenones having the formula (II) that are intermediates for preparing the compound of the formula (I).
本发明提供了制备具有公式(I)的喹诺
酮羧酸衍
生物的方法:其中R1为H、卤素或
氨基;R2为卤素;R3为H、卤素、C1-4烷氧基或CN;R4选自由C3-6环烷基、C1-4烷基、C1-4烷氧基C1-4烷基、C1-4烷基
氨基C1-4烷基组成的组。本发明还提供了新的具有公式(II)的
乙酰苯酮,其为制备公式(I)化合物的中间体。