Process for the manufacture of a furancarboxylic acid anilide
CA 1097366 A · Owner: Consortium Fur Elektrochemische Industrie G.M.B.H. · Inventors: Kaufmann, Rudolf; Haberle, Norman; Braunling, Hermann
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the manufacture of furancarboxlylic acid anilides of the general formula in which R represents an aryl group or an alkyl group R and R each represent an alkyl group or hydrogen by, a ring-closure reaction of a .beta. -ketoester with an ?haloaldehyde or ?-haloketone, in the presence of a stoichiometric amount of a halide-binding substance to form a furancarboxylic acid ester, and by subsequent anilidation, the reaction being performed in two stages the ring-closure reaction being carried out in the presence of a mixture of alkaline earth metal carbonates and pyridine in a ratio of from 1000 to 5 : 1 Val based, on the hydrohalic acid liberated at temperatures between, 50° and …
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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 March 10, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 10, 1998.
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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.