Prostanoic acid derivatives and process for producing same
CA 1105013 A · Owner: Schering Aktiengesellschaft · Inventors: Raduchel, Bernd; Vorbruggen, Helmut; Loge, Olaf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A prostanoic acid derivative of the formula (I), which is luteolytic is produced, for example from a ketone of, the formula, (II) , by ketalizing the ketone reducing the ketal thus produced with, a diisobutyl-aluminium hydride and reacting the resulting hemi-, acetal with a Wittig reagent of the formula PH3P=CH-(CH2)3-COOR, In the above formulae R1 represents a hydrogen atom, a, straight or branched alkyl group containing 1-10 carbon atoms a substituted or unsubstituted aryl group or a -CH2-U-V- group in which U is a direct bond, a carbonyl or carbonyloxy group and V is a phenyl ring substituted by one or more phenyl groups alkoxy groups containing 1-2 carbon atoms or halogen atoms, …
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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 July 14, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 14, 1998.
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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.