7-chloro-1-(2,4-difluorophenyl)-1,4-dihydro-8-methyl-6-nitro-4-oxoquinolone-3-carboxylic acid 、
N,N-二乙基尼哌丁酰胺 在
potassium carbonate 作用下,
以
二甲基亚砜 为溶剂,
以98%的产率得到7-(3-(diethylcarbamoyl)piperidin-1-yl)-1-(2,4-difluorophenyl)-1,4-dihydro-8-methyl-6-nitro-4-oxoquinoline-3-carboxylic acid