Process for the production of heterocyclic compounds and products obtained thereby
CA 1050995 A · Owner: Anic S.P.A. · Inventors: Koch, Paolo; Perrotti, Emilio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a process for the production of five membered ketonic heterocyclic compounds of the general formula:, (l), wherein: - R1, R2, R3, R4 and R6 are identical or different and each represent n hydrogen atom or an alkyl radical having from 1 to 3 carbon atoms, which may be substituted by an hydroxy group or a radical of the formula -COOR5 in which R5 represents an alkyl radical having from 1 to 3 carbon atoms; - X is an oxygen or sulfur atom;, - Y is a sulfur or nitrogen atom; and - m is the valence of Y. This process comprises reacting a difunctional compound of the formula:, (2), wherein R1, R2, R3 R4, R6, X, Y and m have the above meanings; with carbon monoxyde …
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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 20, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 20, 1996.
- 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.