Preparation of isoxazole-5-carboxamide derivatives
CA 2026762 A1 · Owner: Basf Aktiengesellschaft · Inventors: Freund, Wolfgang; Kuekenhoehner, Thomas; Goetz, Norbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
17 - O.Z. 0050/41146, Abstract of the Disclosure: A process for preparing isoxazole-5-carboxamide derivatives of the formula I I, where, R1 is an aliphatic radical of 1 to 20 a cycloaliphatic, radical of 3 to 10, an aromatic radical of 6 to 10 a heteroaromatic or heterocyclic radical of 3 to 10 or an araliphatic radical of 4 to 12 carbon atoms it being possible for these radicals to carry substituents which are inert under the reaction conditions, R2 is alkyl, R4 and R5 are identical or different and are each hydrogen, C1-C6-alkyl, C1-C5-cyanoalkyl C2-C6-alkenyl, or C2-C5-alkynyl, and/or C3-C8-cycloalkyl which is unsubstituted or substituted by from 1 to 3 C1-C4alkyl groups, or are linked …
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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
- Filed October 2, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 2, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 2, 2012.
- 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.