7-(4-(tert-butoxycarbonyl)-3-methylpiperazin-1-yl)-1-cyclopropyl-6-fluoro-1,4-dihydro-8-methoxy-4-oxoquinoline-3-carboxylic acid 、
tetraethyl N-(bromoacetyl)-N-methyl-1-aminomethylenebisphosphonate 在
caesium carbonate 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 12.0h,
以30%的产率得到(N-methyl-1,1-bis(diethylphosphono)methylcarbamoyl)methyl 7-(4-(tert-butoxycarbonyl)-3-methylpiperazin-1-yl)-1-cyclopropyl-6-fluoro-1,4-dihydro-8-methoxy-4-oxoquinoline-3-carboxylate