Chemical process for preparing an azetidin-2-one
CA 1330546 C · Owner: Betts, Michael John · Inventors: Betts, Michael John; Oldham, Keith
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Azetidin-2-ones that are N-substituted by a phenyl group carrying a selected ortho- or para-substituent are subjected to electrochemical oxidation to yield N-unsubstituted azetidin-2ones. The N-substituted azetidin-2-ones can bear other substituents, provided that the substituents are such that the reaction proceeds without undesired substantial oxidation of the remainder of the molecule. The oxidation can be carried out in a liquid medium that comprises up to about 50% water and a substantially inert organic solvent, using platinum or platinised titanium as working electrode. Suitably the temperature is in the range of about -5°C to about +85°C, the potential of the working electrode is in …
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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 July 5, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 5, 2011.
- 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.