7-(n-substituted amino)-2-phenylheptanoic acid derivative and process for manufacturing the same
CA 2211930 A1 · Owner: Seido, Nobuo · Inventors: Sotoguchi, Tsukasa; Kumobayashi, Hidenori; Yuasa, Yoshifumi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a 7-(N-substituted amino)-3-oxo-2phenylheptanoate derivative, 7-(N-substituted amino)-3hydroxy-2-phenylheptanoate derivative, and 7-(Nsubstituted amino)-3-benzenesulfonyloxy-2phenylheptanoate derivative, which are quite important major intermediates for an antidepressant. The 7-(Nsubstituted amino)-3-oxo-2-phenylheptanoate derivative can be manufactured by condensing an enolate of phenylacetates with a 5-(N-substituted amino)pentanoate derivative.
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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 July 29, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 29, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 29, 2019.
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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.