Diepoxy-androstanes and a process for the preparation thereof
CA 1069497 A · Owner: Richter Gedeon Vegyeszeti Gyar Rt · Inventors: Tuba, Zoltan; Marsai, Maria
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 new compound 5.alpha. 17.beta.-diacetoxy-6.beta.-chloro- 2.alpha.3.alpha.;16.alpha.17.alpha.-diepoxy-androstane and to a process for the preparation thereof. The new compound of the invention is a valuable intermediate product in the synthesis of new steroid compounds having curare-like activity. The new compound 5.alpha.17.beta.-diacetoxy-6.beta.-chloro-2.alpha.3.alpha.;16.alpha.17.alpha.-diepoxy-androstane is prepared according to the invention by reacting 5.alpha.17.beta.-dihydroxy-17-oxo-androst-2-ene with an organic sulfonic acid chloride preferably with methanesulfonic acid, chloride and then reacting the obtained …
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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 January 8, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 8, 1997.
- 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.