Preparation of anthranilic acid amides

US4421931A · kind A · utility

Assignee

• BASF SE

Inventors

• Peter Tonne
• Winfried Ludwig · Havelsee, DE
• Gerhard Kilpper · Battenberg, DE
• Johannes Grimmer · Aarhus, DK

Key dates

• Filing date: Jan 11, 1982
• Grant date: Dec 20, 1983
• Expiry date: Jan 11, 2002

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C233/00
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Anthranilic acid amides are prepared by mixing phthalamic acid with a caustic alkali solution, a catalyst and a hypohalite, allowing the mixture to stand for from 1 to 1,000 seconds, then introducing the amine and thereafter addig acid until the pH of the mixture is from 6 to 8. The anthranilic acid amides obtainable by the process of the invention are valuable starting materials for the preparation of dyes, scents and pesticides.