Process for producing (2-nitro-phenyl)acetonirtile derivative and intermediate used for synthesis thereof
CA 2463232 A1 · Owner: Kumiai Chemical Industry Co. Ltd. · Inventors: Takabe, Fumiaki; Abe, Tetsuya; Nagata, Toshihiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for producing a compound represented by the formula IV which comprises the steps (1) to (3): a step in which a compound represented by the formula I is reacted with either a compound represented by the formula VI or a mixture of the compound represented by the formula VII and a compound represented by the formula VIII to obtain a compound represented by the formula IX, which is hydrolyzed under acid conditions to form a compound represented by the formula II; a step in which the compound represented by the formula II is reacted with a hydroxylamine to obtain a compound represented by the formula III; and a step in which the compound represented by the formula III is …
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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 September 27, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 27, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 27, 2024.
- 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
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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.