摘要:
The present invention relates to 3-carboxy-2-oxo-l -pyrrolidine derivatives of formula (I), geometrical isomers, enantiomers, diastereoisomers, pharmaceutically acceptable salts and all possible mixtures thereof, and processes using them.
摘要:
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) wherein R1 is methyl or ethyl ; and R2 is C2'-C4191 alkyl, C2191-C4191 alkenyl or C2191-C41 91 alkynyl, optionally substituted by one or more halogen, and their preparation processes.