Continuous method for production of cinnamaldehyde and dihydrocinnamaldehyde derivatives

US6723883B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Jörg Therre · Worms, DE
• Andreas Kramer · Zürich, CH
• Andreas Weiper-Idelmann · Waldsee, DE
• Michael Schulik · Ludwigshafen, DE
• Regina Benfer · Altrip, DE
• Jürgen Schossig · Wemding, DE
• Mathias Haake · Mannheim, DE
• Hans-Georg Gobbel · Kallstadt, DE

Key dates

• Filing date: Apr 15, 2002
• Grant date: Apr 20, 2004
• Expiry date: May 24, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C45/73
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to a continuous process for the preparation of cinnamaldehyde or cinnamaldehyde derivatives by continuous reaction of benzaldehyde derivatives with alkanals in the presence of bases and optionally subsequent continuous hydrogenation in a circulation reactor in the presence of a suspension catalyst and hydrogen to give dihydrocinnamaldehyde derivatives.