Method for preparing chiral esters
CA 2393336 A1 · Owner: Pohang University Of Science And Technology · Inventors: Jung, Hyun Min; Koh, Jeong Hwan; Park, Jai Wook
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a method for preparing a chiral ester and more particularly, the method for preparing an optically pure chiral ester from an alkenyl ester at a high yield by mixing and reacting: an alkenyl ester; a ruthenium complex to activate reduction reaction of said alkenyl ester and racemization; a lipase to acylate selectively one of enantiomers of said alkenyl ester; and a reducing agent to supply a hydride to said ruthenium complex. Said optically pure chiral ester of the present invention can be prepared by one-step synthesis from various types of alkenyl esters at a high yield.
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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 October 18, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 18, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 18, 2022.
- 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.