氢氧化钾 、 ethyl 8-fluoro-7-[4-hydroxy-4-(3-trifluoromethylphenyl)piperidin-1-yl]-4-methyl-1-oxo-1,4-dihydrobenzo[f] [1,7]naphthyridine-2-carboxylate 在
水 、
二氯甲烷 、
magnesium sulfate 、
异丙醚 作用下,
以
乙醇 、
水 为溶剂,
80.0 ℃
、2.67 MPa
条件下,
反应 2.0h,
以0.22 g of 8-fluoro-7-[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 melted at 245° C.的产率得到8-fluoro-7-[4-hydroxy-4-(3-trifluoromethylphenyl)piperidin-1-yl]-4-methyl-1-oxo-1,4-dihydrobenzo[f] [1,7]naphthyridine-2-carboxylic acid