2-methyl-2,5-diazabicyclo[2.2.1]heptane dihydrochloride 、
8-Chloro-1-(2,4-difluoro-phenyl)-6,7-difluoro-4-oxo-1,4-dihydro-quinoline-3-carboxylic acid 在
吡啶 、
1,8-二氮杂双环[5.4.0]十一碳-7-烯 作用下,
反应 3.0h,
以51%的产率得到8-Chloro-1-(2,4-difluoro-phenyl)-6-fluoro-7-((1S,4S)-5-methyl-2,5-diaza-bicyclo[2.2.1]hept-2-yl)-4-oxo-1,4-dihydro-quinoline-3-carboxylic acid