7-(4-Benzyl-piperazin-1-yl)-1-(2-hydroxy-ethyl)-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47%的产率得到7-(4-Benzyl-piperazin-1-yl)-1-(2-chloro-ethyl)-4-oxo-1,4-dihydro-[1,6]naphthyridine-3-carboxylic acid ethyl ester