Process for the preparation of heterocyclic substituted oxazolones
CA 1280754 C · Owner: Merrell Dow Pharmaceuticals (Canada) Inc. · Inventors: Jones, Winton D. Jr.; Schnettler, Richard A.; Claxton, George P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention provides new heterocyclic oxazolones of the formula:, wherein Y is an oxygen or sulfur group; R1 is a hydrogen or a (C1-C5) alkyl group when R2 is R;, R2 is a hydrogen or a (C1-C5) alkyl group when Rl is R; and, R is a 2-, 3- or 4-pyridyl group optionally substituted with a hydroxy, halogen, (C1- C5) alkyl, (C1-C5) alkoxy, (C1-C5) alkylthio, (C1-C5) alkylsulfinyl, (C1-C5) alkylsulfonylr cyano, carboxy, carb(C1-C5)alkoxy, carbamido, (C1-C5) alkanoylamino imidazolyl group, or R is a 2- or 3-, furanyl 2- or 3-thienyl or 2- or 3-pyranyl, group; which enhance myocardial contractile force and cardiac function and are therefore useful as cardiotonics in the treatment of heart …
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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 February 26, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 26, 2008.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.