Palladium mediated reaction of organic disulfides with mercurated nucleic acid components
First Claim
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1. A process of preparing a C-5 substituted nucleoside useful as linking units for probes, therapeutics and nucleotide sequencing, said process comprising:
- reacting a C-5 mecuri-substituted nucleic acid moiety of the formula;
##STR3## wherein X is a soluble organic or inorganic ion, with a disulfide of the formula (RS)2,wherein R is a C1 to C20 alkyl, aryl, alkylaryl, alkoxyalkyl, alkyl carboxyl, aklylcarboxamido, alkyl carbonyl or a C1 to C20 functionally substituted alkyl group,said reaction occurring in the presence of a mediating effective amount of palladium(II) ion source to provide a C-5 substituted nucleoside having a C-5 linker arm attached which will not interfere with the normal Watson-Crick hydrogen bonding process.
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Abstract
A method of preparing C-5 substituted nucleotides by reacting a C-5 posit mercurated nucleoside with an alkyl or aryl disulfide in the presence of palladium(II) ion. The resulting new method for attaching linker arms to nucleic acids (DNA,RNA) provides a wide ranging reaction far more useful than those heretofore developed, and allows preparation of modified components with linking reactive functionality that allows usefulness as probes, therapeutics, and for DNA sequencing.
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17 Claims
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1. A process of preparing a C-5 substituted nucleoside useful as linking units for probes, therapeutics and nucleotide sequencing, said process comprising:
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reacting a C-5 mecuri-substituted nucleic acid moiety of the formula;
##STR3## wherein X is a soluble organic or inorganic ion, with a disulfide of the formula (RS)2,wherein R is a C1 to C20 alkyl, aryl, alkylaryl, alkoxyalkyl, alkyl carboxyl, aklylcarboxamido, alkyl carbonyl or a C1 to C20 functionally substituted alkyl group, said reaction occurring in the presence of a mediating effective amount of palladium(II) ion source to provide a C-5 substituted nucleoside having a C-5 linker arm attached which will not interfere with the normal Watson-Crick hydrogen bonding process. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification