Method for preparing cyclic ketones

US8802897B2 · kind B2 · utility

Assignee

• ALLESSA GMBH · DE

Inventors

• Doris Neumann · Offenbach, DE
• Joachim Ritzer · Rodenbach, DE
• Gunther Effenberger · Bad Vilbel, DE

Key dates

• Filing date: Dec 12, 2012
• Grant date: Aug 12, 2014
• Expiry date: Dec 12, 2032

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C45/006
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A method for hydrogenating optionally substituted phenols with one hydroxyl group to cyclohexanones over modified, palladium-comprising supported catalysts. This is possible surprisingly in selected alcoholic solvents with high selectivity. Here it is even possible to recycle the catalysts employed, which hitherto has only been possible with considerable loss of selectivity.