http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-03014080-A3

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filingDate 2002-08-05-04:00^^<http://www.w3.org/2001/XMLSchema#date>
inventor http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ace53990b3c758d50515a8752efa49bf
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publicationDate 2003-11-06-04:00^^<http://www.w3.org/2001/XMLSchema#date>
publicationNumber WO-03014080-A3
titleOfInvention Oxopyrrolidine compounds, preparation of said compounds and their use in the manufacturing of levetiracetam and analogues
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) 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.
priorityDate 2001-08-10-04:00^^<http://www.w3.org/2001/XMLSchema#date>
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