3-methoxyimino-4-methyl-4-methylaminopiperidine dihydrochloride 、
1-cyclopropyl-6,7-difluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid 在
三乙胺 作用下,
以
乙腈 为溶剂,
以48%的产率得到1-cyclopropyl-6-fluoro-7-(3-methoxyimino-4-methyl-4-methylaminopiperidin-1-yl)-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid