7-Chloro-6-fluoro-1,4-dihydro-1-(2-hydroxyethyl)-4-oxo-3-quinolinecarboxylic acid 、
N-甲基哌嗪 在
溶剂黄146 、
水 、
N,N-二甲基甲酰胺 作用下,
以
吡啶 为溶剂,
反应 18.0h,
以24 g of 6-fluoro-1-(2-hydroxyethyl)-7-(4-methyl-piperazinyl)-4-oxo-1,4-dihydroquinoline-3-carboxylic acid, m.p. 270° C., were obtained的产率得到6-fluoro-1-(2-hydroxy-ethyl)-7-(4-methyl-piperazin-1-yl)-4-oxo-1,4-dihydro-quinoline-3-carboxylic acid