聚合甲醛 、
3-(4-chlorophenylimino)-3,4-dihydroquinoxaline-2-(1H)-one 、
环丙沙星 以
溶剂黄146 为溶剂,
以72%的产率得到7-[4-[(3-(4-chlorophenylimino)-2-oxo-3,4-dihydroquinoxalin-1(2H)-yl)methyl]piperazin-1-yl]-1-cyclopropyl-6-fluoro-4-oxo-1,4-dihydroquinoline-3-carboxylic acid