Synthesis of nitroalcohol diastereomers
CA 2364266 A1 · Owner: Fitzhenry, Sharon · Inventors: Liu, Changhua; Swanson, David A.; Fitzhenry, Sharon
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 of preparing a 1-nitro-3-substituted- 3-amino-2-propanol diastereomer represented by Structural Formula (I): In Structural Formula (I), R is an amine protecting group and R1 is an amino , acid side-chain, a protected amino acid side-chain a substituted or , unsubstituted aliphatic group a substituted or unsubstituted aromatic group a substituted or unsubstituted heteroaromatic group a substituted or , unsubstituted aralkyl or a substituted or unsubstituted heteroaralkyl group. The method involves a contacting a 1-nitro-3-substituted-3-amino-2-propanone with a reducing agent to form a mixture of 1-nitro-3-substituted-3-amino-2propanol …
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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 February 23, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 23, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 23, 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.