7-chloro-6-fluoro-4-oxo-N-[3,3,4,4,4-pentafluorobutan-2-yl]-1-(2,4,6-trifluorophenyl)-1,4-dihydro-1,8-naphthyridine-3-carboxamide 、
3-methyl-1,3,7-triazaspiro[4.4]nonane-2,4-dione hydrochloride 在
N,N-二异丙基乙胺 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
以90%的产率得到6-fluoro-7-(3-methyl-2,4-dioxo-1,3,7-triazaspiro[4.4]non-7-yl)-4-oxo-N-[3,3,4,4,4-pentafluorobutan-2-yl]-1-(2,4,6-trifluorophenyl)-1,4-dihydro-1,8-naphthyridine-3-carboxamide