PROCESS FOR PRODUCING 7-SUBSTITUTED-6-FLUORO-1-(4-FLUORO OR 2,4-DIFLUOROPHENYL)-1,4-DIHYDRO-4-OXO-1,8-NAPHTHYRIDINE-3-CARBOXYLIC ACID DERIVATIVES AND SOME NEW SUCH DERIVATIVES PRODUCED THEREBY

摘要

This invention relates to a process for industrially producing a 1-substituted aryl-1,4-dihydro-4-oxonaphthyridine derivative and a salt thereof which are useful as an antibacterial agent, and also to intermediates therefor and processes for producing the intermediates.