Method of preparing malonic acid dialkyl esters

US4443624A · kind A · utility

Assignee

• Dynamit Nobel GmbH · DE

Inventors

• Uwe Prange · Niederkassel, DE
• Moustafa El Chahawi · Troisdorf, DE
• Wilhelm Vogt · Lichtenau, DE
• Hermann Richtzenbain · Overath, DE

Key dates

• Filing date: Apr 5, 1982
• Grant date: Apr 17, 1984
• Expiry date: Apr 5, 2002

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C69/38
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Production of malonic acid dialkyl esters by reacting halogen acetic acid alkyl ester with carbon monoxide, and alkali metal alcoholate, alkaline earth metal alcoholate or a solution of alkali metal hydroxide in an alcohol at a pH of up to 8.5 in the presence of a cobalt compound which is a catalyst for the reaction.