Method for carboxylating terminal alkynes

US6342149B1 · kind B1 · utility

Assignee

• Forschungszentrum Karlsruhe GmbH · DE

Inventors

• Frank KÖSTER · Pforzheim, DE
• Eckhard Dinjus · Leimersheim, DE

Key dates

• Filing date: Sep 5, 2000
• Grant date: Jan 29, 2002
• Expiry date: Sep 5, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C25B3/25
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A method for carboxylating terminal alkynes that have at least one additional aliphatic carbon atom in an &agr; position and that do not have a proton which has a higher acidity than that of the proton of the terminal triple bond. In an undivided electrolysis cell equipped with a cathode and an anode, a solution of the terminal alkyne in an aprotic solvent is acted upon by carbon dioxide at a pressure higher than atmospheric pressure. The invention provides a method in which carbon dioxide is selectively inserted between the terminal C—H bond, without disturbing the triple bond, and can be carried out without a catalyst or catalyst precursor.