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Purine nucleoside modifications by palladium catalyzed methods and compounds produced

  • US 6,355,787 B1
  • Filed: 01/31/2000
  • Issued: 03/12/2002
  • Est. Priority Date: 09/25/1998
  • Status: Expired due to Term
First Claim
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1. A method for the preparation of a purine base, purine nucleoside or purine nucleotide modified at the 2-, 6- or 8-position of the purine ring comprising the steps of:

  • reacting a purine starting material containing a leaving group attached to the 2-, 6- or 8-position of said purine starting material with a functionalized alkene having the formula;

    embedded imagewhereinY is selected from the group consisting of —

    CHROH, —

    C(O)R, —

    COOR, —

    C(O)NRR′

    , —

    CN, a substituted or unsubstituted aryl group or heterocylic group, selected from the group consisting of phenyl, 2-,3- or 4-hydroxyphenyl, 2-, 3- or 4-pyridyl and 1H-tetrazol-5-yl;

    R and R′

    are independently selected from the group consisting of H, substituted or unsubstituted alkyl, alkenyl and aryl; and

    n is an integer from 0-15 in the presence of a palladium catalyst of the general formula PdL3 or PdL4, wherein L is a ligand of palladium; and

    isolating said modified nucleoside.

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