168487. lajstromszámú szabadalom • Eljárás új ciklopenteno-kinolon-származékok előállítására

Process for the preparation of new cyclopenteno-quinolone derivatives The invention relates to a process for the preparation of new cyclopenteno-quinolone derivatives. The new compounds of the general formula I, wherein R represents lower alkyl group, X represents hydrogen atom, Y represents halogen atom, azido, lower alkylmercapto, lower alkyl-sulfonyl, amino or lowe: monoalkanoyl-amino group. The new compounds and pharmaceutically acceptable salts thereof have stronger antimicrobial effect in vivo, then the known.compounds of analogous structure. They are especially suitable for the treatment of urinary passage infections. 10 Csnn _ nrw _ IOWIM