16-keto-17-substituted thia-17-alkyl (or alkenyl or alkynyl) androstenes
CA 1266641 C · Owner: Varma, Ravi K. · Inventors: Varma, Ravi K.; Karanewksy, Donald S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A steroid having the formula: or a 1,2-dehydro derivative thereof, wherein R1 is alkyl mono-, di- or trifluoroalkyl, R6-?-O-(CH2)? aryl or alkylthioalkyl, wherein, R6 is alkyl or aryl and m is 1,2 3 or 4;, R3 is carbonyl or .beta.-hydroxymethylene: R4 is hydrogen or halogen;, R5 is hydrogen methyl or fluorine; and, R7, R8 and R9 are each independently hydrogen or alkyl of 1 to 4 carbon, atoms: which is useful as an intermediate in the preparation of related steroids having the formula: and the 1,2-dehydro derivatives thereof which are themselves useful as therapeutic agents because of their anti-inflammatory activity.
Read the whole patent
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 March 13, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 13, 2007.
- 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.