Famotidine intermediates and their preparation
CA 1313677 C · Owner: Bekhazi, Michel · Inventors: Bekhazi, Michel; Oren, Josef
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Halogenated N-sulfamyl propionamidine addition salts corresponding to the formula, are provided in which X represents halogen and A, represents an acid selected from sulfuric acid nitric, acid, benzenesulfonic acid; toluenesulfonic acid; 2,4,5trichlorobenzenesulfonic acid; trichloroacetic acid; trifluoroacetic acid or methanesulfonic acid are, provided. They are useful as intermediates in the preparation of famotidine. They are prepared by reacting a halogenated proprionitrile with the respective acid.
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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 February 16, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 16, 2010.
- 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.