8-chloro-3-ethoxycarbonyl-7-fluoro-4-oxo-1,4-dihydrobenzo [b][1,8]naphthyridine 在
乙醇 、
乙醚 作用下,
以
盐酸 为溶剂,
反应 0.5h,
以3.05 g of 8-chloro-7-fluoro- 4-oxo-1,4-dihydro-benzo[b][1,8]naphthyridine-3-carboxylic acid are obtained in the form of a beige solid which的产率得到8-Chloro-7-fluoro-4-oxo-1,4-dihydro-benzo[b][1,8]naphthyridine-3-carboxylic acid