PROCESS FOR THE PRODUCTION OF BICYCLIC 3.alpha.-HYDROXY LACTONE INTERMEDIATES USEFUL IN THE PREPARATION OF PROSTAGIANDIN_TYPE COMPOUNDS
CA 1069520 A · Owner: Upjohn Company (The) · Inventors: Van Rheenen, Verlan H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention comprises an improved process whereby bicyclic lactones useful in the preparation of prostaglandin-type (PG-type) compounds are produced. In particular the process provides a method whereby the potential 15.alpha.-hydroxy of a PG-type compound is introduced with high stereo-selectivity into the lactone side chain by reduction of a side chain oxo moiety. -1-
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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 8, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 8, 1997.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.