Process for producing substituted aniline compounds from acetanilides
CA 2425531 C · Owner: Ihara Chemical Industry Co. Ltd. · Inventors: Ogawa, Mahito; Hiyoshi, Hidetaka
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a process for producing a pyrimidine-substituted aniline compound of formula (6):, (see formula 6), (wherein R1 R2 and R3 are each alkyl, alkoxy, alkoxyalkyl haloalkyl, carboxyl, alkoxycarbonyl, alkylcarboxamide nitro, aryl, arylalkyl, aryloxy, halogen or hydrogen; and X and Y are each hydrogen, alkyl, alkoxy alkoxyalkyl, haloalkyl, carboxyl, alkoxycarbonyl or halogen) by , oxidizing a pyrimidine-substituted indole compound of formula (3):, (see formula 3) , (wherein R1 R2, R3, X and Y are defined above) to open of the indole ring to produce a pyrimidine-substituted acetanilide compound of formula (4):, (see formula 4) (wherein R1, R2, R3, X and Y are …
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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 October 15, 2001 and granted January 4, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 15, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 15, 2023.
- 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.