Method of preparing the enantiomers of O-dimethyltramadol

US5728885A · kind A · utility

Assignee

• Gruenenthal GmbH · DE

Inventors

• Helmut Buschmann · Walheim, DE
• Werner Winter · Aachen, DE
• Ivars Graudums · Stolberg, DE
• Peter Jansen · Uithuizen, NL
• Wolfgang Strassburger · Würselen, DE
• Elmar Josef Friederichs · Stolberg, DE

Key dates

• Filing date: Jan 17, 1997
• Grant date: Mar 17, 1998
• Expiry date: Jan 17, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C2601/14
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A method of preparing the enantiomers of O-demethyltramadol and the use of the enantiomers as pain-killing drugs are described.