2'-OMe-2-Aminopurine-CE Phosphoramidite

5'-Dimethoxytrityl-N2-(dimethylaminomethylidene)-2-aminopurine riboside,2'-O-methyl,3'-[(2-cyanoethyl)-(N,N-diisopropyl)]-phosphoramidite
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To aid in the evaluation of the structures of 2'-OMe-RNA complexes, we offer several CE phosphoramidites. 2'-OMe-T is useful in triplex studies while the 2-aminopurine derivative may be tested in ribozyme studies. By supporting an additional hydrogen bond, 2,6-diaminopurine (2-amino-adenosine) binds more strongly with uridine than does adenosine. Oligonucleotides containing 2'-OMe-5-Me-C and 2'-OMe-I would be of interest to researchers involved in triplex and antisense studies using 2'-OMe-RNA. The uses of 2'-OMe-5-bromo-U phosphoramidite range from crystallographic studies due to the heavy atom to cross-linking because of its photolability. 5-Fluoro-pyrimidine nucleosides have been useful as therapeutic agents and their effect on the structure and activity of oligonucleotides may be examined using the 2'-OMe-RNA derivatives. The 2,4,6-trimethylphenyl (TMP) protected 2'-OMe-U derivative is a convertible nucleoside and reaction with ammonia leads to the 5-fluoro-dC analogue. 2'-OMe-3-deaza-5-aza-C (Reverse C) derivative has the potential to mimic in oligonucleotides 5-azacytidine, a DNA methylase inhibitor. Its ability to bind as a C will likely be diminished.



  • Coupling: 6 minute coupling time
  • Deprotection: No changes needed from standard method recommended by synthesizer manufacturer.
Diluent Anhydrous Acetonitrile
Storage Refrigerated storage, maximum of 2-8°C, dry
Stability 3-5 days

Dilution/Coupling Data

The table below show pack size data and, for solutions, dilution and approximate coupling based on normal priming procedures.

ABI 392/394

Catalog # Pack Size Grams/Pack 0.1M Dil. (mL) Approximate Number of Additions
LV40 LV200 40nm 0.2μm 1μm 10μm
10-3123-02 0.25 g .25grams 2.98 86 51.6 32.25 23.45 17.2 4.3
10-3123-90 100 µmol .084grams 1 20 12 7.5 5.45 4 1
10-3123-95 50 µmol .042grams 0.5 3.33 2 1.25 0.91 0.67 0.17


Catalog # Pack Size Grams/Pack Dilution (mL) Approximate Number of Additions
Molarity 50nm 0.2μm 1μm 15μm
10-3123-02 0.25 g .25grams 4.45 0.07 82.6 51.63 37.55 5.16
10-3123-90 100 µmol .084grams 1.5 0.07 23.6 14.75 10.73 1.48
10-3123-95 50 µmol .042grams 0.75 0.07 8.6 5.38 3.91 0.54