Method for the carbonylation of pentenoic acid and derivatives thereof
CA 2436874 A1 · Owner: Basf Aktiengesellschaft · Inventors: Slany, Michael; Schafer, Martin; Roper, Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method for the carbonylation of n-pentenoic acid or derivatives thereof of formula (I), wherein R1 represents CN or COOR2 and R2 represents hydrogen, alkyl or aryl. According to said method a compound of , formula (I) is reacted with carbon monoxide and a compound (II) containing a hydroxyl group in the presence of a catalyst system. The method is characterised in that the catalyst system is obtained by reacting a) a source of a metallic ion of a metal (III) of the 8th subgroup of the periodic table with b) a bidentate phosphine ligand of formula (IV) wherein R3, R4, R5, R6, R7, R8, R9, R10 R11, R12, R13 and R14 independently of one another represent an …
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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
- Filed December 3, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 3, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 3, 2023.
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Timeline
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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.