4-(4-Pyridinyl)isatoic anhydride

US4524203A · kind A · utility

Assignee

• Ethyl Corporation · US

Inventors

• Thomas Walter · Penzberg, DE
• Paul F. Ranken · Baton Rouge, US

Key dates

• Filing date: Aug 15, 1983
• Grant date: Jun 18, 1985
• Expiry date: Aug 15, 2003

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D213/55
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

4-(4-Pyridinyl)isatoic anhydrides are prepared by reacting a 2-amino-4-(4-pyridinyl)benzoic acid, i.e., an acid, ester, or salt, with phosgene, preferably gaseous phosgene. The products are particularly useful in the preparation of antibacterial 1-alkyl-1,4-dihydro-4-oxo-7-pyridinyl-3-quinolinecarboxylic acids.