Method of preparing amine stereoisomers
CA 2482432 A1 · Owner: Lu, Zhi-Hui · Inventors: Krishnamurthy, Dhileepkumar; Senanayake, Chris Hugh; Lu, Zhi-Hui
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention provides a method of preparing amine stereoisomers which , comprises stereoselectively reducing a sulfinylimine that bears on the sulfmyl group a residue of an alcohol, thiol or amine or reacting a sulfmylimine , stereoisomer that bears on the sulfinyl group a residue of an alcohol thiol , or amine with a source of a nucleophile to afford a sulfmylamine , stereoisomer followed by contacting the sulfmylamine stereoisomer with a reagent suitable for the cleavage of a sulfur-nitrogen bond to afford an , amine stereoisomer. It also provides novel intermediates useful in the method and the use of certain of the intermediates in the preparation of sulfoxide and sulfmylamine …
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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 April 7, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 7, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 7, 2025.
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Timeline
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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.