Process for the preparation of .alpha.-alkylacroleins

US4943663A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Gerhard Diekhaus · Oberhausen, DE
• Harald Kappesser · Oberhausen, DE

Key dates

• Filing date: Nov 22, 1988
• Grant date: Jul 24, 1990
• Expiry date: Nov 22, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C45/75
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for the preparation of alpha-alkylacroleins from aldehydes and formaldehyde. The reaction takes place in the presence of a secondary amine and a carboxylic acid having up to 5 carbon atoms, and is performed in two stages so that, in the first stage, part of the carboxylic acid is added to the reaction mixture and, in the second stage, the remaining carboxylic acid is added.