The invention concerns 2-oxo-1-pyrrolidine derivatives and a process for preparing
them and their uses. The invention also concerns a process for preparing -ethyl-2-oxo-1-pyrrolidine
acetamide derivatives from unsaturated 2-oxo-1-pyrrolidine derivatives. Particularly
the invention concerns novel intermediates and their use in methods for the preparation
of S--ethyl-2-oxo-1-pyrrolidine acetamide.