3.beta.-HYDROXY-2-(SUBSTITUTED 1-ALKENYL)-5-OXOCYCLOPENTANE-1-HEPTANOIC ACIDS
CA 1071625 A · Owner: G.D. Searle And Co. Of Canada Limited · Inventors: Miyano, Masateru; Dorn, Clifford R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
7-3.beta.-hydroxy-2.beta.-(3-hydroxy-3-alkyl-1-alkenyl)-5oxocyclopentane-1.alpha.-heptanoic acids and their alkyl esters are obtained by the reaction of an alkyl metal compound with a 7-3.beta.-hydroxy-2.beta.-(3-oxo-1-alkenyl)-5-oxocyclopentane- 1.alpha.-heptanoic acid wherein the 3.beta.-hydroxy group is preferably protected by an alcohol protecting group. When the indicated reaction is complete, any protecting group is removed and if the ester is desired, the carboxylic acid is treated with an appropriate esterifying agent such as diazomethane. The prostaglandin derivatives so produced are valuable and useful as pharmacological agents as is evidenced by their anti-fertility activity. -1-
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 February 12, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 12, 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
Timeline From CIPO dates
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.