Process for the preparation of oxyiminoalkanoic acid derivatives
CA 2389208 A1 · Owner: Yamane, Taihei · Inventors: Inagaki, Atsushi; Yamane, Taihei; Yabe, Osamu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the preparation of compounds of general formula (III) or salts thereof wherein R1 is a heterocyclic group or the like; X is -CO- or the like; n is 1 to 3; Y is oxygen or the like; A is a benzene ring or the like; p is 1 to 8; R2 is a heterocyclic group or the like; q is 0 to 6; m is 0 or 1; R4 and R5 are each a hydrocarbon group or the like; or alternatively R4 and R2 may be united to form a ring), characterized by reacting a compound of general formula (I) or a salt thereof (wherein Z is halogeno or the like) with a compound of the general formula (II) or a salt thereof in an amide in the presence of a metal alkoxide.
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 October 26, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 26, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 26, 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.