Enhanced triple-helix and double-helix formation with oligomers containing modified purines
First Claim
1. An oligomer comprising from 2 to 30 nucleomonomers wherein at least one of said nucleomonomers comprises a base having the formula (1) or (2):
- ##STR11## wherein Pr is hydrogen or a monovalent or divalent protecting group;
W is N or CH;
R2 is aryl, heteroaryl or 1-alkynylheteroaryl;
R8 is OH, SH, NPr, NHPr or NH2 ;
R9 is H, OH, SH, NPr, NHPr or NH2 ;
R10 is independently H, OH, CN, F, Cl, Br, I, alkyl (C1-12), alkenyl (C2-12), alkynyl (C2-12), aryl (C6-9), heteroaryl (C4-9), or both R10, taken together with the carbon atoms to which they are linked at positions 11 and 12, form(a) a 5 or 6 membered carbocyclic ring or,(b) a 5 or 6 membered heterocyclic ring comprising 1-3 N, O or S ring atoms, provided that no 2 adjacent ring atoms are O--O, S--S, O--S or S--O,and wherein any unsaturated C atom of the carbocyclic or heterocyclic ring is substituted by R11 and any saturated carbons contain 2 R11 substituents, wherein;
R11 is independently H, alkyl (C1-4), alkenyl (C2-4), alkynyl (C2-4), OR12, SR12, or N(R12)2 or halogen provided that there are no more than four halogens per 5 or 6 member ring;
R12 is independently H, or alkyl (C1-4);
and salts thereof.
1 Assignment
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Accused Products
Abstract
Novel oligomers are disclosed which have enhanced ability with respect to forming duplexes or triplexes compared with oligomers containing only conventional bases. The oligomers contain 7-deaza-7-substituted purines or related analogs. The oligomers of the invention are capable of (i) forming triplexes with various target sequences such as virus or oncogene sequences by coupling into the major groove of a target DNA duplex at physiological pH or (ii) forming duplexes by binding to single-stranded DNA or to RNA encoded by target genes. The oligomers of the invention can be constructed to have any desired sequence, provided the sequence normally includes one or more bases that is replaced with the analogs of the invention. Compositions of the invention can be used for diagnostic purposes in order to detect viruses or disease conditions.
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Citations
58 Claims
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1. An oligomer comprising from 2 to 30 nucleomonomers wherein at least one of said nucleomonomers comprises a base having the formula (1) or (2):
- ##STR11## wherein Pr is hydrogen or a monovalent or divalent protecting group;
W is N or CH; R2 is aryl, heteroaryl or 1-alkynylheteroaryl; R8 is OH, SH, NPr, NHPr or NH2 ; R9 is H, OH, SH, NPr, NHPr or NH2 ; R10 is independently H, OH, CN, F, Cl, Br, I, alkyl (C1-12), alkenyl (C2-12), alkynyl (C2-12), aryl (C6-9), heteroaryl (C4-9), or both R10, taken together with the carbon atoms to which they are linked at positions 11 and 12, form (a) a 5 or 6 membered carbocyclic ring or, (b) a 5 or 6 membered heterocyclic ring comprising 1-3 N, O or S ring atoms, provided that no 2 adjacent ring atoms are O--O, S--S, O--S or S--O, and wherein any unsaturated C atom of the carbocyclic or heterocyclic ring is substituted by R11 and any saturated carbons contain 2 R11 substituents, wherein; R11 is independently H, alkyl (C1-4), alkenyl (C2-4), alkynyl (C2-4), OR12, SR12, or N(R12)2 or halogen provided that there are no more than four halogens per 5 or 6 member ring; R12 is independently H, or alkyl (C1-4); and salts thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
- ##STR11## wherein Pr is hydrogen or a monovalent or divalent protecting group;
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20. An oligomer of the formula (5);
- ##STR13## wherein each R1 is independently H, PO3-2, or a blocking group;
each R3 is independently selected from the group consisting of H, OH, F, NH2, OCH3, OC2 H5, OC3 H7, SCH3, SC2 H5, SC3 H7, OC3 H5, and SC3 H5 ; each X1 is independently selected from the group consisting of --P(S)(O)--, --P(S)(S)--, --P(O)(O)--, --P(CH3)(O)-- and --P(CH3)(S)--; n is an integer from 0 to 98; and B is a base, provided that at least one B is of formula (1) or (2);
##STR14## wherein Pr is H or a monovalent or divalent protecting group;W is N or CH; R2 is aryl, heteroaryl or 1-alkynylheteroaryl; R8 is OH, SH, a NPr or NH2 ; R9 is H, OH, SH, NPr, NHPr or NH2 ; R10 is independently H, OH, CN, halogen (F, Cl, Br, I), alkyl (C1-12), alkenyl (C2-12), alkynyl (C2-12), aryl (C6-9), heteroaryl (C4-9), or both R10, taken together with the carbon atoms to which they are linked at positions 11 and 12, form (a) a 5 or 6 membered carbocyclic ring or, (b) a 5 or 6 membered heterocyclic ring comprising 1-3 N, O or S ring atoms, provided that no 2 adjacent ring atoms are O--O, S--S, O--S or S--O, and wherein any unsaturated C atom of the carbocyclic or heterocyclic ring is substituted by R11 and any saturated carbons contain 2 R11 substituents, wherein; R11 is independently H, alkyl (C1-4), alkenyl (C2-4), alkynyl (C2-4), OR12, SR12, or N(R12)2 or halogen provided that there are no more than four halogens per 5 or 6 member ring; and R12 is independently H, or alkyl (C1-4). - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
- ##STR13## wherein each R1 is independently H, PO3-2, or a blocking group;
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32. A nucleomonomer having the structural formula (3) or (4):
- ##STR16## wherein each R1 is independently H or a blocking group;
R2 is aryl, heteroaryl or 1-alkynylheteroaryl; R3 is selected from the group consisting of H, OH, F, NH2, OCH3, OC2 H5, OC3 H7, SCH3, SC2 H5, SC3 H7, OC3 H5, and SC3 H5 ; R8 is OH, SH, NPr, NHPr or NH2 ; R9 is H, OH, SH, NPr, NHPr or NH2 ; R10 is independently H, OH, CN, halogen (F, Cl, Br, I), alkyl (C1-2), alkenyl (C2-12), alkynyl (C2-12), aryl (C6-9), heteroaryl (C4-9), or both R10, taken together with the carbon atoms to which they are linked at positions 11 and 12, form (a) a 5 or 6 membered carbocyclic ring or, (b) a 5 or 6 membered heterocyclic ring comprising 1-3 N, O or S ring atoms, provided that no 2 adjacent ring atoms are O--O, S--S, O--S or S--O, and wherein any unsaturated C atom of the carbocyclic or heterocyclic ring is substituted by R11 and any saturated carbons contain 2 R11 substituents, wherein; R11 is independently H, alkyl (C1-4), alkenyl (C2-4), alkynyl (C2-4), OR12, SR12, or N(R12)2 or halogen provided that there are no more than four halogens per 5 or 6 member ring; R12 is independently H, or alkyl (C1-4); W is CH or N; and Pr is H or a monovalent or divalent protecting group. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
- ##STR16## wherein each R1 is independently H or a blocking group;
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45. An oligomer comprising from 2 to 30 nucleomonomers wherein at least one of said nucleomonomers comprises a base having the formula:
- ##STR18## wherein Pr is H or a monovalent or divalent protecting group;
R2 is 1-propynyl; R8 is OH, SH, NPr, NHPr or NH2 ; R9 is H, OH, SH, NPr, NHPr or NH2 ; and W is N or CH and salts thereof. - View Dependent Claims (46, 47, 48, 49, 50, 51)
- ##STR18## wherein Pr is H or a monovalent or divalent protecting group;
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52. An oligomer of the formula (5):
- ##STR19## wherein each R1 is independently H, PO3-2, or a blocking group;
each R3 is independently selected from the group consisting of H, OH, F, NH2, OCH3, OC2 H5, OC3 H7, SCH3, SC2 H5, SC3 H7, OC3 H5, and SC3 H5 ; each X1 is independently selected from the group consisting of --P(S)(O)--, --P(S)(S)--, --P(O)(O)--, --P(CH3)(O)-- and --P(CH3)(S)--; n is an integer from 0 to 98; and B is a base, provided that at least one B is of formula;
##STR20## wherein R2 is 1-propynyl;R8 is OH or SH; R9 is NPr, NHPr or NH2 ; Pr is H or a monovalent or divalent protecting group; and W is N or CH. - View Dependent Claims (53, 54, 55, 56, 57, 58)
- ##STR19## wherein each R1 is independently H, PO3-2, or a blocking group;
Specification