1-(2-Hydroxy-ethyl)-7-(4-methyl-piperazin-1-yl)-4-oxo-1,4-dihydro-[1,6]naphthyridine-3-carboxylic acid ethyl ester 在
氯化亚砜 作用下,
以
氯仿 为溶剂,
以56%的产率得到1-(2-Chloro-ethyl)-7-(4-methyl-piperazin-1-yl)-4-oxo-1,4-dihydro-[1,6]naphthyridine-3-carboxylic acid ethyl ester