[EN] 2-OXO-1-PYRROLIDINE DERIVATIVES, PROCESS FOR PREPARING THEM AND THEIR USES [FR] DERIVES DE 2-OXO-1-PYRROLIDINE, PROCEDE DE PREPARATION ET UTILISATIONS CORRESPONDANTES
A process for the manufacturing of levetiracetam, wherein said process comprises the steps of: (1) reacting the (-)-(S)-alpha-ethyl-2-oxo-1-pyrrolidine acetic acid with a substoichiometric amount of an activating agent in an alcoholic solvent, and (2) subjecting the resulting reaction solution of step (1) to an ammonolysis process with gaseous ammonia.
A process for the manufacturing of levetiracetam, wherein said process comprises the steps of: (1) reacting the (−)-(S)-alpha-ethyl-2-oxo-1-pyrrolidine acetic acid with a substoichiometric amount of an activating agent in an alcoholic solvent, and (2) subjecting the resulting reaction solution of step (1) to an ammonolysis process with gaseous ammonia.
Oxopyrrolidine compounds, preparation of said compounds and their use in the manufacturing of levetiracetam and analogues
申请人:Ates Celal
公开号:US20070142647A1
公开(公告)日:2007-06-21
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 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.