Difluorosteroids and processes for their manufacture
CA 1058159 A · Owner: Ciba-Geigy Ag · Inventors: Biollaz, Michel; Kalvoda, Jaroslav
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A novel group of 18,18-difluorosteroids of the general formula (I), wherein St, R1 and R2 have the meanings given hereinafter is producted by a chemically novel process characterised in that a corresponding 18-oxo compound is treated with a compound of the formula, F3SX, wherein X denotes a fluorine atom or an amino group derived from secondary amine. The compounds of the invention are useful as pharmaceutical intermediates. A number of them are physiologically active and possess hormone-like properties, e.g. those of sexual and/or adrenocortical hormones, such as the gonadotropin-blocking ovulation-blocking, androgenic, oestrogenic progestagenic, anabolic, antioesero-, genic antindrogcnic, …
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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 July 10, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 10, 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.