Preparation of N-alkenylpyrrolidones

US5410070A · kind A · utility

Assignee

• BASF SE

Inventors

• Lothar Franz · Ludwigshafen, DE
• Michael Huellmann · Heppenheim, DE

Key dates

• Filing date: Jan 27, 1994
• Grant date: Apr 25, 1995
• Expiry date: Jan 27, 2014

Classification

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

Abstract

Process for the preparation of N-alkenylpyrrolidones of the general formula ##STR1## in which R denotes hydrogen or C.sub.1 -C.sub.20 alkyl, by the reaction of an N-alkylpyrrolidone of the general formula ##STR2## in which R has the aforementioned meanings, and x and Y stand for OH, C.sub.1 -C.sub.20 alkoxy or C.sub.2 -C.sub.20 alkoxycarbonyl, provided that one of the two radicals x and denotes hydrogen, at temperatures ranging from 200.degree. to 600.degree. C. and pressures ranging from 0.1 to 5 bar, wherein the process is carried out in the presence of an acid heterogenous catalyst except for an oxide of a Group IIb, Group IIIb, Group IVb, and Group VIb metal.