Method of synthesizing alkenone compounds

US7057079B2 · kind B2 · utility

Assignee

• SOLVAY FLUOR und DERIVATE GmbH · DE

Inventors

• Max Braun · Großburgwedel, DE
• Uta Claassen · Hohenhameln, DE

Key dates

• Filing date: Aug 6, 2004
• Grant date: Jun 6, 2006
• Expiry date: Aug 6, 2024

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C45/455
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A method of producing a halogen alkenone ether by attaching carboxylic acid halogenides or carboxylic acid anhydrides to a vinyl ether. According to the invention the method is carried out in the presence of an onium salt of a carbonic acid which can be regenerated. The resulting product is obtained in high yields. Alternatively, pyridine which is substituted by one, two or three C1–C3 alkyl groups or other onium salts can be used.