Process for the preparation of 1-hydroxy-2-pyridones

US5817825A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Anuschirwan Peyman · Kelkheim, DE
• Dieter Reuschling · Rockenberg, DE
• Adolf Linkies · Frankfurt, DE

Key dates

• Filing date: Oct 12, 1995
• Grant date: Oct 6, 1998
• Expiry date: Oct 12, 2015

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D213/89
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for the preparation of 1-hydroxy-2-pyridones is described in which a pyrone is reacted with a hydroxyl-ammonium salt in the presence of basic compounds, solvents and organic acids or salts thereof.