| abstract |
The present invention relates to an improved process for the preparation of (S)-(-)-α-ethyl-2-oxo-1-pyrrolidine acetamide and analogues thereof. The invention also relates to compounds of the general formula (6) n n nwherein R 1 is methyl or ethyl; and R 2 is C 2 -C 4 alkyl, C 2 -C 4 alkenyl or C 2 -C 4 alkynyl, optionally substituted by one or more halogen, and their preparation processes. |