2-methyl-2,5-diazabicyclo[2.2.1]heptane dihydrochloride 、
7-fluoro-1-p-fluorophenyl-6,8-difluoro-1,4-dihydro-4-oxo-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 2.0h,
以55%的产率得到6,8-Difluoro-1-(4-fluoro-phenyl)-7-((1S,4S)-5-methyl-2,5-diaza-bicyclo[2.2.1]hept-2-yl)-4-oxo-1,4-dihydro-quinoline-3-carboxylic acid