Preparation of pyridonecarboxylic acid antibacterials

摘要

A process for making 1-(6-amino-3,5-difluoropyridin-2-yl)-8-chloro-6-fluoro-7-(3-hydroxyazetidin-1-yl)-4-oxo-1,4-dihydro-3-quinolinecarboxylic acid, and therapeutically acceptable salts thereof, and intermediates used in the process are disclosed.