Intermediates for 1,8-bridged 4-quinolone-3-carboxylic acid antibacterials

US4902795A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Michael Schriewer · Odenthal, DE
• Klaus Crohe · Odenthal, DE
• Hans-Joachim Zeiler · Velbert, DE
• Karl G. Metzger · Wuppertal, DE

Key dates

• Filing date: Nov 17, 1988
• Grant date: Feb 20, 1990
• Expiry date: Nov 17, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D471/06
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Antibacterially active new 1,8-bridged 4-quinolone-3-carboxylic acid derivatives of the formula ##STR1## in which Y is carboxyl or a derivative thereof PA0 R.sup.1, R.sup.2, R.sup.3, R.sup.4, X.sup.1, X.sup.2 and X.sup.5 are H or various radicals, PA0 Z is O, NH, substituted NH, ##STR2## or ##STR3## m and n are 0 or 1, and A, B, D and E are CH or substituted C or up to three of them are N, and physiologically acceptable salts thereof. Novel intermediates are described as well as processes for making the intermediates and end products.