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Expired Canadian patentCanada

Process for preparing hmg-coa reductase inhibitors with a 3,5-dihydroxypentanoate subunit

CA 1282425 C · Owner: Merck & Co. Inc. · Inventors: Sletzinger, Meyer; Verhoeven, Thomas R.; Mcnamara, James M.

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Abstract From the Canadian patent

TITLE OF THE INVENTION, PROCESS FOR PREPARING HMG-CoA REDUCTASE INHIBITORS WITH A 3,5-DIHYDROXYPENTANOATE SUBUNIT. ABSTRACT OF THE INVENTION A stereoselective process for the, preparation of antihypercholesterolemic agents of the HMG-CoA reductase inhibitor type comprises treatment of an intermediate .beta.-hydroxyketone with a trialkylborane and sodium borohydride at low temperatures.

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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 April 2, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 2, 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.
FiledMay 28, 1985
GrantedApril 2, 1991
Term endedApril 2, 2008
Patent numberCA 1282425 C
Classification (IPC)C07C69/66 +2 more

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