Process for the preparation of substituted 3-aryl-butyl-amine compounds
CA 2528087 C · Owner: Kegel, Markus · Inventors: Kegel, Markus; Heller, Detlef; Buschmann, Helmut
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides a process for the preparation of a substituted 3aryl-butyl-amine compound of the general formula I (see formula I) , wherein the process comprises in a first step a) a 1-amino-3-aryl-butan-3-ol compound of the general formula II, (see formula II) is employed and elimination is carried out under the action of an acid to give a , substituted 3-aryl-but-3-enyl-amine compound of the general formula III (see formula III) , and in a second step b) the substituted 3-aryl-but-3-enyl-amine compound according , to the general formula III formed is then hydrogenated under participation of a metal , catalyst and hydrogen to give the substituted 3-aryl-butyl-amine compound of …
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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 June 4, 2004 and granted May 1, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 4, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 4, 2026.
- 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.