A process for the preparation of 6,6-dimethylhept-1-en-4-yn-3-ol
CA 2350394 A1 · Owner: Chemagis Ltd. · Inventors: Kaspi, Joseph; Friedman, Oded; Danon, Edna
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides a process for the preparation of 6,6-dimethylhept-1-en-4-yn-3-of comprising of reacting t-butylacetylene with a proton-extracting agent selected from the group consisting of an organometallic compound and metallic lithium to form a t-butylacetylide reacting the acetylide with acrolein at temperatures between -40°C to +20°C, quenching the reaction mixture and isolating the product.
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
- Filed June 13, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 13, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 13, 2023.
- 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.