Isomerization of a pentol
CA 2351789 A1 · Owner: Simon, Werner · Inventors: Simon, Werner; Gruendler, Hansjoerg; Gloor, Arnold
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a process for catalytically isomerizing Z-3-methylpent-2-en-4-yn-1-of to E- 3-, methylpent-2-en-4-yn-1-ol in a mixture of both these stereoisomers there are employed as, the isomerization catalyst bromine radicals and the isomerization is conducted in a two-, phase system of an aqueous phase and the stereoisomeric mixture phase the, stereoisomeric mixture optionally being present in an essentially waterimmiscible organic, solvent, with intermixing of the reaction mixture and at temperatures from about -10ÀC to, about 100ÀC. The source of the bromine radicals is generally an alkali metal or alkaline, earth metal bromide, or ammonium bromide. In one embodiment of the process of the, …
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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
- Filed June 26, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 26, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 26, 2023.
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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.