Method of producing ketoisophorone

US5874632A · kind A · utility

Assignee

• Degussa AG · DE

Inventors

• Rainer Hahn · Tübingen, DE
• Ulrich Gora · Gelnhausen, DE
• Klaus Huthmacher · Gelnhausen, DE
• Frank Hubner · Ober-Ramstadt, DE
• Steffen Krill · Mühltal, DE

Key dates

• Filing date: May 15, 1997
• Grant date: Feb 23, 1999
• Expiry date: May 15, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C45/34
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

An improved method of producing 3,5,5-trimethylcyclohex-2-ene-1,4-dione (KIP) by the oxidation of 3,5,5-trimethylcyclohex-3-ene-1-one (.beta.-IP) in the presence of managansalene-like catalysts and certain catalytic additives. ##STR1## KIP is an important intermediary product in the synthesis of trimethylhydroquinone, an initial substance in the synthesis of vitamin E. Furthermore, KIP is an initial compound for the synthesis of various carotinoids.