N-Alkyl-4-(4-pyridinyl)isatoic anhydrides

US4515945A · kind A · utility

Assignee

• Ethyl Corporation · US

Inventors

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

Key dates

• Filing date: Aug 15, 1983
• Grant date: May 7, 1985
• Expiry date: Aug 15, 2003

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D413/04
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

N-alkyl-4-(4-pyridinyl)isatoic anhydrides are prepared by alkylating a 4-(4-pyridinyl)isatoic anhydride, suitably in the presence of sodium hydride and N,N-dimethylformamide. The products are particularly useful in the preparation of antibacterial 1-alkyl-1,4-dihydro-4-oxo-7-pyridinyl-3-quinolinecarboxylic acids.