PROCESS FOR THE PREPARATION OF 7-HETEROCYCLYL-4-OXO-1,4-DIHYDROQUINOLINES AND -1,4-DIHYDRO-1,8-NAPHTHYRIDINES

摘要

A process for the preparation of quinolinecarboxylic acids of the formula (I) in which R<1>, R<2> and R<3>, X and A have the meaning given in the description, which are used as such or in the form of their esters, salts, prodrugs etc. as antibacterial agents in human and veterinary medicine and as agents stimulating the immune defence.