Process for the preparation of carbamates
CA 1291155 C · Owner: Drent, Eit · Inventors: Drent, Eit
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the preparation of carbamates which comprises reacting an aromatic nitro compound with a hydroxyl group containing organic compound and carbon monoxide in the presence of a catalytic system comprising, a) palladium and/or a palladium compound b) a ligand having the formula I, (I), in which X and Y represent the same or different bridging groups each of which has 3 or 4 atoms in the bridge of which atoms at, least two are carbon atoms and which groups X and Y may be bound to each other by means of a connection other than that already formed by the carbon atoms shown in formula I and c) a compound MZ, wherein M is a metal of the group consisting of Cu, Fe, V, Cr, Zn, Sn, U 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 October 22, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 22, 2008.
- 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.