Process for the preparation of nizatidine
CA 2265435 A1 · Owner: Cornwall, Philip · Inventors: Cornwall, Philip
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 novel process for the preparation of nizatidine, N-2-2-(dimethylamino)methyl-4-thiazolylmethylthioethyl-N'methyl-2-nitro-1,1-ethenediamine, and pharmaceutically acceptable salts thereof, comprising reacting a compound of formula (II) with a compound of formula (III) or a salt thereof, in which X represents a leaving group in the , presence of methylamine in the presence of an inert diluent.
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 29, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 29, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 29, 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.