Process for manufacturing d,1-b-benzoylamino isobutyric acid
CA 1107757 A · Owner: Sigma-Tau Industrie Farmaceutiche Riunite S.P.A · Inventors: Diamanti, Enrico; De Witt, Paolo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
PROCESS FOR MANUFACTURING D,?-.beta.-BENZOYLAMINO- ISOBUTYRIC ACID, ABSTRACT OF THE DISCLOSURE A two-step process for manufacturing d,?-.beta.-benzoylaminoisobutyric acid is disclosed, wherein in the first step benzamide is reacted with methacrylonitrile in the presence of an alkaline catalyst in an anhydrous solvent medium at atmospheric pressure thus obtaining d,?-.beta.-benzoylamino-isobutyronitrile which, in the, second process step, without necessarily being previously crystallized is directly hydrolyzed to d,?-.beta.-benzoylamino-isobutyric acid.
Read the whole patent
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 August 25, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 25, 1998.
- 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.