Process for the preparation of bicyclic amino carboxylic acids, intermediates in this process, and their use
CA 1332422 C · Owner: Sanofi-Aventis Deutschland Gmbh · Inventors: Henning, Rainer; Urbach, Hansjorg
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the disclosure, A process for the preparation of bicyclic amino carboxylic acids, intermediates in this process, and their use The invention relates to a process for the preparation of compounds of the formula 1, (I), in which n denotes 1 2 or 3, R denotes acyl, and R1 denotes alkyl, cycloalkyl, aralkyl or another carboxyl protective group, which comprises radical cyclization of compounds of the formula II, (II), in which n, R and R1 are as defined above and Hal denotes, chlorine, bromine or iodine to intermediates in this pro-, cess, and to their use.
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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 October 11, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 11, 2011.
- 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.