Process for preparing 2-guanidinomethyl-perhydroazocine-sulfate
CA 1053449 A · Owner: Egyt Gyogyszervegyeszeti Gyar · Inventors: Beck, Ivan; Horvath, Imre; Rakoczi, Jozsef
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a novel process for preparing 2-guanidinomethyl-perhydroazocine-sulfate of formula I /I/, comprising the steps of catalytically reducing the 2-nitromethylene perhydroazocine of formula IV, /IV/, in acetone solution at a temperature of 20 to 50°C treating, the separated reaction product with an aqueous mineral acid and then reacting it with S-methyl-isothiocarbamid-sulfate. The process gives the desired end-product of formula I also on industrial scales.
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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 May 1, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 1, 1996.
- 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.