A method for deuteration of a heterocyclic ring
CA 2506010 A1 · Owner: Muto, Kazushige · Inventors: Maesawa, Tsuneaki; Sajiki, Hironao; Hirota, Kosaku
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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A method for deuteration or tritiation of a heterocyclic ring characterized , in that it comprises allowing a heterocyclic compound to be present under a sealing and refluxing condition in a deuterated or tritiated solvent in the presence of an activated catalyst selected from among a palladium catalyst a , platinum catalyst, a rhodium catalyst a ruthenium catalyst, a nickel catalyst and a cobalt catalyst. The method allows a deuteration or tritiation temperature to be kept at a temperature higher than the boiling temperature of the solvent, which results in the replacement of a hydrogen atom in a heterocyclic ring of a heterocyclic compound with very good efficiency. Further, the …
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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 November 7, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 7, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 7, 2025.
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