The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 04, 1992
Filed:
Oct. 08, 1991
Ludwig Schuster, Limburgerhof, DE;
Ulrich Koehler, Heidelberg, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
A process for the preparation of a 2-pyrrolidinone of the general formula I ##STR1## in which R.sup.1 and R.sup.2 are independently hydrogen, C.sub.1 -C.sub.20 -alkyl, or C.sub.3 -C.sub.8 -cycloalkyl optionally substituted by C.sub.1 -C.sub.4 -alkyl, or phenyl optionally substituted by C.sub.1 -C.sub.4 -alkyl, by reacting a 3-cyanopropionate of the general formula II ##STR2## in which R.sup.1 and R.sup.2 have the meanings stated above and R.sup.3 denotes C.sub.1 -C.sub.8 -alkyl, with hydrogen at elevated temperature and pressure, wherein the reaction is carried out in the presence of ammonia and in contact with a catalyst containing cobalt, manganese, and phosphorus.