7-(4-(4-carboxybutanoyl)piperazin-1-yl)-1-cyclopropyl-6-fluoro-4-oxo-1,4-dihydroquinoline-3-carboxylic acid 、 (3S,6S)-3-(4-aminobutyl)-6-(4-[(E)-(2,6-difluorophenyl)diazenyl]benzyl)piperazine-2,5-dione 在
O-(1H-benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate 、
N,N-二异丙基乙胺 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 2.17h,
以41%的产率得到1-cyclopropyl-7-(4-(5-((4-((2S,5S)-5-(4-((E)-(2,6-difluorophenyl)diazenyl)benzyl)-3,6-dioxopiperazin-2-yl)butyl)amino)-5-oxopentanoyl)piperazin-1-yl)-6-fluoro-4-oxo-1,4-dihydroquinoline-3-carboxylic acid