Provided are a technique for position-selectively introducing an amino group into a difluorobenzoic acid, a novel process for producing a quinolonecarboxylic acid derivative serving as an antibacterial agent, and intermediates in the production. The process comprises treating a compound represented by formula (6):
with a base in a water-containing solvent. The intermediates are represented by formula (6):
提供了一种技术,用于在二
氟苯甲酸中选择性地引入
氨基,一种生产喹诺
酮羧酸衍
生物作为抗菌剂的新方法,以及生产中间体。该过程包括在含
水溶剂中用碱处理由公式(6)表示的化合物。中间体由公式(6)表示: