195375-62-3Relevant articles and documents
OLIGONUCLEOTIDE COMPOSITIONS AND METHODS OF MAKING THE SAME
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Paragraph 00488; 00493-00499, (2015/11/24)
The present disclosure provides a solid phase method of making oligonucleotides via sequential coupling cycles including at least one coupling of a dinucleotide dimer subunit to a free 3'-terminal group of a growing chain. The oligonucleotides include at least two nucleoside subunits joined by a N3'→P5' phosphoramidate linkage. The method may include the steps of (a) deprotecting the protected 3' amino group of a terminal nucleoside attached to a solid phase support, said deprotecting forming a free 3' amino group; (b) contacting the free 3' amino group with a 3'-protected amino-dinucleotide-5'-phosphoramidite dimer in the presence of a nucleophilic catalyst to form an internucleoside N3'→P5' phosphoramidite linkage; and (c) oxidizing (e.g., sulfurizing) the linkage. The compositions produced by the subject methods may include a reduced amount of one or more (N-x) oligonucleotide products. Also provided are pharmaceutical compositions including the subject oligonucleotide compositions.
N3′→P5′ Oligodeoxyribonucleotide Phosphoramidates: A New Method of Synthesis Based on a Phosphoramidite Amine-Exchange Reaction
Nelson, Jeffrey S.,Fearon, Karen L.,Nguyen, Mark Q.,McCurdy, Sarah N.,Frediani, Jeff E.,Foy, Michael F.,Hirschbein, Bernard L.
, p. 7278 - 7287 (2007/10/03)
A new method for the synthesis of N3′→P5′ phosphoramidate oligodeoxynucleotides is demonstrated. Described herein is the synthesis of the monomers utilized in the phosphoramidite amine-exchange process and the experimental details pertaining to this new mode of chain assembly. The phosphoramidite amine-exchange method generates coupling yields in the 92-95% range per cycle and further enables the synthesis of chimeric phosphoramidate/phosphodiester or phosphoramidate/ phosphorothioate oligonucleotides with no instrument modifications.