Process for preparing amine platinum complexes
CA 2368849 C · Owner: Genzyme Corporation · Inventors: Wong, Ernest S. Y.; Giandomenico, Christen M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to the area of platinum drugs. In particular it , relates to an improved process for preparing platinum complexes having general formula (Ia) or (Ib), comprising: 1a) a first step wherein PtA42- is , reacted with L under appropriate conditions in a first solvent to form PtA3(L)-; 1b) a second step, wherein PtA3(L)- is reacted with L' under appropriate conditions in a second solvent to form cis-(PtA2(L')(L); 1c) in the case there Y is halogen or hydroxy a thrid step wherein cis-PtA2(L')(L) , is reacted with H2O2 Y2 or halogen containing oxidant to form c,t,c- PtA2Y2(L')(L); in the case where Y is carboxylate carbamate or carbonate , ester a fourth step …
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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 April 11, 2000 and granted January 25, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 11, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 11, 2022.
- 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
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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.