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Expired Canadian patentCanada

Amino acid-derived cyclic phosphonamides and methods of synthesizing the same

CA 2419775 C · Owner: Mcreynolds, Matthew D. · Inventors: Hanson, Paul R.; Mcreynolds, Matthew D.; Sprott, Kevin T.

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Abstract From the Canadian patent

New phosphonamide compounds and methods of forming those compounds are provided. In one embodiment, the inventive methods comprise subjecting an opened-ring phosphonamide template to a ring-closing metathesis reaction in the presence of a ring-closing catalyst (e.g. a Grubbs catalyst) to yield a phosphonamide. In another embodiment, the inventive methods comprise reacting a template structure with a phosphorus (III) compound to yield the phosphonamide. Advantageously, in either embodiment the template structures , can be provided with a wide array of functional groups (e.g. amino acid side chains, peptides) chosen to provide particular properties to the compound.

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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 August 6, 2001 and granted December 2, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 6, 2021.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 6, 2023.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 6, 2001
GrantedDecember 2, 2014
Term endedAugust 6, 2021
Patent numberCA 2419775 C
Classification (IPC)C07F9/65 +2 more

Timeline

Timeline From CIPO dates

2002200420062008201020122014201620182020Application filedAug 6, 2001Patent grantedDec 2, 2014Term endedAug 6, 2021

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.