Process for the preparation of 7-alkoxyalkyl-1,2,4-triazolo1,5-a pyrimidine derivatives
CA 2263368 A1 · Owner: Holman, Nicholas John · Inventors: Holman, Nicholas John; Koser, Stefan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved process for the preparation of 1,2,4-triazolo1,5-apyrimidine compounds comprising the reaction involving a compound of formula (II) and a , compound of formula (III), in the presence of an oxidising agent and a reducing agent, wherein a metal salt is added to form a complex with the oxidised reducing agent produced in the process and this complex is separated , from the desired product.
Read the whole patent
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 August 13, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 13, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 13, 2019.
- 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.