6,7-dichloro-1-ethyl-4-oxo-1,4-dihydro-quinoline-3-carboxylic acid 、
N-苯基哌嗪 、
吡啶 在
乙二醇甲醚 作用下,
以
溶剂黄146 为溶剂,
反应 16.0h,
以1.7 g of 6-chloro-1-ethyl-4-oxo-7-(4-phenylpiperazinyl)-1,4-dihydro-quinoline-3-carboxylic acid, m.p. 234°-235° C., were obtained的产率得到6-chloro-1-ethyl-4-oxo-7-(4-phenyl-piperazin-1-yl)-1,4-dihydro-quinoline-3-carboxylic acid