DERIVATIVES OF 1,8-BENZO/b/NAPHTHYRIDINE, PROCESS OF THEIR PREPARATION AND ANTIBACTERIAL COMPOSITION IN WHICH SAID DERIVATIVES ARE COMPRISED

摘要

Derivatives 1, c-benzo [b] naphthyridine of the general formula I in which R @ 1 is 1. is a hydrogen atom or a hydroxyl or alkyl radical; means an alkyl radical, a fluoroalkyl radical, a cycloalkyl radical having from 3 to 6 carbon atoms, or an alkoxy radical; means a phenyl or phenylalkyl radical substituted by one or more halogen atoms or alkyl radicals, cycloalkyl radicals having from 3 to 6 carbon atoms, alkoxy radicals, cyano radicals, amine radicals, alkylamino radicals, dialkylamino radicals, alkoxyalkyl radicals, hydroxyalkyl radicals, hydroxyalkoxy radicals, methylene radicals. dioxy radicals, aminoalkyl radicals, alkylaminoalkyl radicals or dialkylaminoalkyl radicals or R.sub.3. also means a heterocyclic radical and R.sub.4. is hydrogen or fluorine. These novel products are useful as antibacterially active agents or in the treatment of AIDS and can be prepared by substituting piperazine for use