Process for the preparation of ruthenium compounds

US6743935B2 · kind B2 · utility

Assignee

• FIRMENICH SA · CH

Inventors

• Albrecht Salzer · Aachen, DE
• Frank Peter Herbert Podewils · Düsseldorf, DE
• Stefan Geyser · Hückelhoven, DE

Key dates

• Filing date: Oct 8, 2002
• Grant date: Jun 1, 2004
• Expiry date: Oct 15, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F15/0046
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for the preparation of ruthenium compounds of the formula {Ru(dienyl)2} wherein “dienyl” represents a substituted pentadienyl or cycloheptadienyl group by reacting dichloro(2,7-dimethylocta-2,6-dien-1,8-diyl)-ruthenium with an appropriate diene in the presence of a primary or secondary alcohol capable of reducing Ru(IV) to Ru(II); and a carbonate of an alkaline material. These ruthenium compounds are useful as precursors of Ru catalysts.