Preparation of N-substituted pyrrolidones

US5101045A · kind A · utility

Assignee

• BASF SE

Inventors

• Ulrich Koehler · Heidelberg, DE
• Hardo Siegel · Speyer, DE

Key dates

• Filing date: Jun 4, 1991
• Grant date: Mar 31, 1992
• Expiry date: Jun 4, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D207/267
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for the preparation of N-substituted pyrrolidones by catalytic hydrogenation of maleic anhydride, maleic acid and/or fumaric acid in the presence of ammonia uses at least stoichiometric amounts of a primary alcohol or of an aldehyde and uses a catalyst which comprises cobalt and at least one of the elements manganese, copper, phosphorus, molybdenum and/or sodium.