(R)-.alpha.-ETHYL-2-OXO-L-PYRROLIDINEACETAMIDE
CA 1237138 A · Owner: U.C.B. · Inventors: Giurgea, Corneliu; Gobert, Jean; Bodson, Guy
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to (R)-alpha-ethyl-2-oxo-1pyrrolidineacetamide of the formula:, and to its preparation either by reacting (R)-alpha-ethyl-2oxo-1-pyrrolidineacetic acid successively with an alkyl haloformate and with ammonia, or by cyclizing an (R)-2amino-butanamide of the formula X-CH2CH2-Y-NHCH(C2H5)CONH2 wherein Y is a -CH2- radical when X represents a ZOOCradical and Y is a -CO- radical when X represents a HalCH2radical, Z being a C1-C4 alkyl radical and Hal a halogen atom. This dextrorotatory enantiomer has been found to have significantly higher mnemic activity and lower toxicity than the corresponding racemate.
Read the whole patent
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 May 24, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 24, 2005.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.