| abstract |
The invention relates to a process for the preparation of novel pyrrolidinone derivatives for use as medicaments. The aim of the invention is the provision of compounds with increased effectiveness with regard to the improvement of memory performance as well as with a new spectrum of activity including the Antitumoraktivitaet. According to the invention, lactampetides of the formula I are prepared in which R 1 is hydrogen, C 1-4 -alkyl, aryl-lower alkyl or aryl and R 2 is hydrogen, lower-alkyl or aryl, where both R 2 and R 2 have the same meaning, and salts of such compounds having at least one salt-forming group. |