Substituted ferrocenyldiphosphines as ligands for homogeneous hydrogenation catalysts
CA 2524902 C · Owner: Umicore Ag & Co. Kg · Inventors: Spindler, Felix; Lotz, Matthias; Thommen, Marc
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of the formula (I), in which R1 is C1-C4alkyl C6-C10aryi or C7-, C11,aralkyl, R2 is an open-chain or cyclic secondary amino group and R is a , radical of the formula in which R3 is C1-C4alkyl or C1-C4alkoxy and R4 is H, C1-C4alkyl or C1-C4alkoxy are ligands for metal complexes as homogeneous hydrogenation catalysts for prochiral organic compounds containing double bonds, by means of which a very high activity and productivity and also enantioselectivity can be achieved.
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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 May 7, 2004 and granted July 10, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 7, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 7, 2026.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.