丙烯酸苄酯 、
8-氟环丙沙星 在
乙醇 作用下,
反应 5.0h,
以2.3 g of 7-[4-(2-benzyloxycarbonyl-ethyl)-piperazin-1-yl]-1-cyclopropyl-6,8-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid having a decomposition temperature of 132°-135° C. are obtained的产率得到7-[4-(2-benzyloxycarbonyl-ethyl)-piperazin-1-yl]-1-cyclopropyl-6,8-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid