Methods of synthesis of halogen base-modified oligonucleotides and subsequent labeling with a metal-catalyzed reaction
First Claim
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1. An improved method of synthesizing a labeled oligonucleotide comprising:
- attaching a nucleoside of the oligonucleotide to be synthesized to a solid support through a labile linker arm;
said nucleoside containing a removable protecting group attached to a 5′
hyroxyl of a sugar group of said nucleoside;
removing said protecting group;
adding a further nucleoside containing a linker arm and a protecting group to said solid support under conditions where said further nucleoside is coupled to said 5′
hydroxyl of said sugar group through said linker arm;
optionally capping any uncoupled nucleoside;
removing the protecting group of said further nucleoside;
repeating the above with further nucleoside derivatives wherein at least one of said further nucleoside contains a detectable label, until a desired oligonucleolide is formed; and
cleaving said oligonucleotide from said solid support;
wherein the improvement comprises adding at least one dimethoxytrityl, phosphorarridite halonucleoside derivative in place of one of said at least one nucleoside containing a detectable label, wherein said halonucleoside is selected from the group consisting of a C5-halo-pyrimidine, a C8-halo-puine and a C7-halo-7-deazapurine; and
labeling said halonucleoside derivative with a detectable label in place of said halogen during or subsequent to formation of said oligonucleotide.
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Abstract
The present invention provides metal-containing purines, pyrimidines, nucleosides, nucleotides and oligonucleotides; including phosphoramidite and photolabile derivatives thereof, including methods of making and method of using same. The present invention provides a method for detection of nucleic acid sequences via electrochemical or photochemical means.
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21 Claims
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1. An improved method of synthesizing a labeled oligonucleotide comprising:
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attaching a nucleoside of the oligonucleotide to be synthesized to a solid support through a labile linker arm;
said nucleoside containing a removable protecting group attached to a 5′
hyroxyl of a sugar group of said nucleoside;
removing said protecting group;
adding a further nucleoside containing a linker arm and a protecting group to said solid support under conditions where said further nucleoside is coupled to said 5′
hydroxyl of said sugar group through said linker arm;
optionally capping any uncoupled nucleoside;
removing the protecting group of said further nucleoside;
repeating the above with further nucleoside derivatives wherein at least one of said further nucleoside contains a detectable label, until a desired oligonucleolide is formed; and
cleaving said oligonucleotide from said solid support;
wherein the improvement comprises adding at least one dimethoxytrityl, phosphorarridite halonucleoside derivative in place of one of said at least one nucleoside containing a detectable label, wherein said halonucleoside is selected from the group consisting of a C5-halo-pyrimidine, a C8-halo-puine and a C7-halo-7-deazapurine; and
labeling said halonucleoside derivative with a detectable label in place of said halogen during or subsequent to formation of said oligonucleotide. - View Dependent Claims (2, 3, 11, 13, 15, 17)
wherein R1, R2, R3, and R4 independently are a hydrogen atom, a lower alkyl, aryl, benzyl, halogen, hydroxyl, alkoxyl, thio, thioether, amino, nitro, carboxyl, formate, foramino or phosphido group, or adjacent substituents R1-R4 are substituted oxygen groups that together form a cyclic acetal or ketal;
R5 is hydrogen, alkoxyl. alkyl, halo, aryl or alkenyl group, n=0, 1, 2 or 3; and
Y is a hydroxyl group of the nucleoside.
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17. The improved method of claim 1, wherein said nucleoside contains a uricil, adenine, thymine, cylosine, guanine or natural or synthetic analogs thereof.
- 4. An improved method of oligonucleotide synthesis comprising combining phosphoramidite nucleoside derivatives in combination with a solid support wherein the improvement comprises adding at least one phosphoramidite halonucleoside during the synthesis and subsequently labeling said halonucleoside with a marker in a metal catalyzed reaction in place of said halogen to form a labeled nucleoside, wherein said halonucleoside is selected from the group consisting of a C5-halo-pyrimidine, a C8-halopurine and a C7-halo7-deazapurine.
Specification