摘要 |
A process for the preparation of a 2-pyrrolidinone of the general formula I <IMAGE> (I) in which R1 and R2 are independently hydrogen, C1-C20-alkyl, or C3-C8-cycloalkyl optionally substituted by C1-C4-alkyl, or phenyl optionally substituted by C1-C4-alkyl, by reacting a 3-cyanopropionate of the general formula II <IMAGE> (II) in which R1 and R2 have the meanings stated above and R3 denotes C1-C8-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.
|