Phenyl substituted pyrrolinones
CA 1260484 A · Owner: Ciba-Geigy Investments Ltd. · Inventors: Iqbal, Abul; Pfenninger, Johannes; Rochat, Alain C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Phenyl Substituted Pyrrolinones, Abstract of the Disclosure The invention relates to pyrrolinones of formula (1) (1), wherein R1 is an alkyl group containing at least 2 carbon atoms an aralkyl group, an isocyclic or heterocyclic aromatic radical and R is an alkyl or aryl group. The invention also relates to aminodicarboxylates of formula (2), (2), wherein R1 is as defined in claim 1 and R and R' are the same or different and are alkyl or aryl. The aminodicarboxylates of formula (2) are prepared by condensing a disuccinate of the formula R'OOCCH2CH2COOR, with a nitrile of the formula R1CN in the presence of a strong, base and zinc chloride. The pyrrolinones of formula (1) are obtained by …
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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 September 26, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 26, 2006.
- 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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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.