Process for the preparation of 2-(thienyl-2)- ethylamines and 2-(thienyl-3)-ethylamines
CA 1205811 A · Owner: Sanofi · Inventors: Anne-Archard, Gilles; Valette, Gerard; Heymes, Alain
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 2-(thienyl-2)- and 2-(thienyl-3)-ethylamines of the general formula:-, (I), in which R1 and R2 which can be the same or different, are hydrogen atoms straight-chained-or branched alkyl, radicals or heterocyclic or non-heterocyclic aromatic radicals, which are optionally mono- or polysubstituted wherein a compound of the general formula:- (IV), in which R1 and R2 have the same meanings as above is, subjected to catalytic hydrogenation under a hydrogen pressure of from 1 to 100 atmospheres and at a temperature of from 20 to 100°C. to give a compound of the general formula:-, (V), in which R1 and R2 have the same meanings as above …
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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
- Granted June 10, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 10, 2003.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.