4h-thiopyrans, process for their preparation and their use in medicaments
CA 1198107 A · Owner: Bayer Aktiengesellschaft · Inventors: Schramm, Matthias; Goldmann, Siegfried; Thomas, Gunter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Thiopyrans of the formula in which, R is an optionally substituted aryl or heterocyclic radical, R1, R3 and R4 each independently is hydrogen an, achiral alkyl radical, an optionally substituted aryl or heterocyclic radical, or one of R1 and R4 is bridged via a ring with R, R2 is hydrogen alkyl, aryl, carboxyalkyl or amino-, alkyl and, X is O, S or NH, are produced by reacting a thione of the formula with an acetylene compound of the formula The products are effective in controlling disorders of the central nervous system.
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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 December 17, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 17, 2002.
- 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
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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.