Process for the production of the pyrrolidinones having central nervous system activity
CA 1249593 A · Owner: Societe Anonyme Styled: Sanofi · Inventors: Biziere, Kathleen; Molimard, Jean-Charles; Chambon, Jean-Pierre
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to novel pyrrolidinones useful for the treatment of psychic, neurological or neuromuscular disorders, of the general formula: (I), in which:, - R1 represents hydrogen or alkyl - R2 represents alkyl, phenyl or trimethylsilyl - R3 represents 2-thienyl or a phenyl possibly substituted once or twice with halogen methyl, methoxy, or a trifluoromethyl group. The novel compounds are formed by hot cyclization of gamma amino ester of formula:, (II), or by alkylation in the 3 position of the pyrrolidinone of formula:,
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted January 31, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 31, 2006.
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Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.