Improved arylamine synthesis
CA 2336976 A1 · Owner: Wolfe, John P. · Inventors: Wolfe, John P.; Sadighi, Joseph P.; Ahman, Jens
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 the preparation of a wide range of primary arylamines. The arylamines are prepared in two efficient straightforward transformations: 1) an activated aryl group and an imine group are combined, in the presence of a transition metal catalyst under conditions , wherein the transition metal catalyst catalyzes the formation of a carbonnitrogen bond between the activated carbon of the arene and the imine nitrogen; and 2) the resulting N-aryl imine is transformed via any of a , number of standard protocols to the primary arylamine. The process of the invention may also be exploited in the preparation of vinylamines.
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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 July 23, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 23, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 23, 2021.
- 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.