ethyl 9-fluoro-4-methyl-1-oxo-8-pyrrolidinyl-1,4-dihydrobenzo[f] [1,7]naphthyridine-2-carboxylate 、 、
氢氧化钾 、
盐酸 在
水 、
乙醇 作用下,
以
乙醇 为溶剂,
60.0~100.0 ℃
、693.27 kPa
条件下,
反应 2.0h,
以0.65 g of 9-fluoro-4-methyl-1-oxo-8-pyrrolidinyl-1,4-dihydrobenzo[f][1,7]naphthyridine-2-carboxylic acid was obtained in the form of yellow crystals, which melted at 365° C.的产率得到9-fluoro-4-methyl-1-oxo-8-pyrrolidinyl-1,4-dihydrobenzo[f] [1,7]naphthyridine-2-carboxylic acid