1-cyclopropyl-1,4-dihydro-6,7-difluoro-8-difluoromethoxy-4-oxo-quinoline-3-carboxylic acid difluoroborate ester 、 cis-2-(4,5,6,6a-tetrahydro-3aH-pyrrolo[3,4-d]isoxazol-3-ylmethyl)isoindole-1,3-dione trifluoroacetate 在
三乙胺 作用下,
以
乙醇 、
乙腈 为溶剂,
生成 1-cyclopropyl-8-difluoromethoxy-7-[3-(1,3-dioxo-1,3-dihydro-isoindol-2-ylmethyl)-3a,4,6,6a-tetrahydro-pyrrolo[3,4-d]isoxazol-5-yl]-6-fluoro-4-oxo-1,4-dihydro-quinoline-3-carboxylic acid