1-ethyl-7-chloro-8-methyl-4-oxo-1,4-dihydroquinoline-3-carboxylic acid 、
哌嗪 在
水 、 resultant residue 、
Water isopropylalcohol 作用下,
以
六甲基磷酰三胺 为溶剂,
反应 8.0h,
以yields 3.2 g of 1-ethyl-7-(1-piperazinyl)-8-methyl-4-oxo-1,4-dihydroquinoline-3-carboxylic acid hydrochloride as the white, needle-like crystals的产率得到1-ethyl-7-(1-piperazinyl)-8-methyl-4-oxo-1,4-dihydroquinoline-3-carboxylic acid hydrochloride