N-[1-(pyrrolidin-3-yl)-ethyl]-N'-tert-butoxycarbonyl-hydrazinecarboxylic acid tert-butyl ester 、
1-环丙基-6,7-二氟-1,4-二氢-8-甲氧基-4-氧代-3-喹啉羧酸 在
三乙胺 作用下,
以
乙腈 为溶剂,
以58%的产率得到7-{3-[1-(N,N'-di-tert-butoxycarbonyl-hydrazino)-ethyl]-pyrrolidin-1-yl}-1-cyclopropyl-6-fluoro-8-methoxy-4-oxo-1,4-dihydro-quinoline-3-carboxylic acid