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Oligonucleotides having universal nucleoside spacers

  • US 5,681,947 A
  • Filed: 10/28/1994
  • Issued: 10/28/1997
  • Est. Priority Date: 09/16/1992
  • Status: Expired due to Fees
First Claim
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1. An oligonucleotide comprising at least ten nucleosides, including at least two different nucleoside members of the group consisting of A, T, C and G, and wherein at least one nucleoside is a universal nucleoside of the formula HO--CH2 ##STR8## wherein in the first cyclic structure illustrated above:

  • each Rn is H, Oh, F or OCH3 ;

    Z is a member of the group consisting of O, S and CH2 ; and

    B is a second cyclic structure comprising a five-membered, cyclic base having at least two double bonds in one of the possible tautomeric forms of the cyclic structure, and further having an electron withdrawing group bonded thereto, said base with electron withdrawing group being represented by the formula;

    ##STR9## wherein;

    said base with electron withdrawing group is bonded at X4 to the second cyclic structure of the nucleoside;

    X1, X3 and X5 are each members of the group consisting of N and C;

    X2 and X4 are each members of the group consisting of N and C; and

    W is NO2 or a carboxamide; and

    wherein B is a member selected from the group consisting of substituted pyrroles, substituted pyrazoles, substituted imidazoles and substituted triazoles.

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