氢氧化钾 、 ethyl 7-fluoro-8-[4-hydroxy-4-(3-trifluoromethylphenyl)piperidin-1-yl]-4-methyl-1-oxo-1,4-dihydrobenzo[f] [1,7]naphthyridine-2-carboxylate 、
溶剂黄146 在
异丙醇 、
异丙醚 作用下,
以
乙醇 、
水 为溶剂,
反应 3.0h,
以0.25 g of 7-fluoro-8-[4-hydroxy-4-(3-trifluoromethylphenyl)piperidin-1-yl]-4-methyl-1-oxo-1,4-dihydrobenzo[f][1,7]naphthyridine-2-carboxylic acid was obtained in the form of a yellow solid, which的产率得到7-fluoro-8-[4-hydroxy-4-(3-trifluoromethylphenyl)piperidin-1-yl]-4-methyl-1-oxo-1,4-dihydrobenzo[f] [1,7]naphthyridine-2-carboxylic acid