Process for ruthenium-catalysed transvinylation of carboxylic acids

US9850193B2 · kind B2 · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Peter Gigler · Dachau, DE
• Jürgen Stohrer · Pullach, DE

Key dates

• Filing date: Nov 19, 2014
• Grant date: Dec 26, 2017
• Expiry date: Nov 19, 2034

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/582
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for selective transvinylation of a reactant carboxylic acid with a reactant vinyl ester to give a product vinyl ester and the corresponding acid of the reactant vinyl ester in the presence of one or more ruthenium catalysts, wherein a) the reactant vinyl ester, the reactant carboxylic acid and the ruthenium catalyst are supplied to a reactor, and b) the transvinylation reaction is conducted, wherein c) the transvinylation reaction is conducted at a conversion of more than 50%, d) on completion of the transvinylation reaction, the reactant vinyl ester and the corresponding acid are separated from the reaction mixture by distillation, e) the product vinyl ester is separated by distillation from the bottom product of the distillation, and f) the remaining reaction mixture is recycled into the reactor.