Summary.
2-(Arylamino)pyrimidin-4-ones were synthesized, silylated, and condensed with l,2,3,5-tetra-O-acetyl-β- d-ribofuranoside to afford the corresponding N 2-aryl protected isocytidines. Deprotection of the acetylated isocytidines using saturated NH3 in MeOH solution gave 1-(β-d-ribofuranosyl)-2-(arylamino)-4-pyrimidinones. Methyl 2-deoxy-3,5-di-O-toluyl-α/β-d-ribofuranoside was prepared and condensed with the previously silylated bases to afford the anomeric mixture of protected nucleosides. The pure β-anomers were synthesized with better yield by treating the sodium salts of N 2-arylisocytosine derivatives with 2-deoxy-3,5-di-O-toluyl-α-d-ribofuranosyl chloride. Deprotection of the latter anomers afforded the corresponding free hydroxyl derivatives. The synthesized free nucleosides are under antiviral and oligonucleotide investigations.
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Ali, O. Synthesis of N 2-Arylisocytidines and N 2-Aryl-2′-deoxyisocytidines. Monatsh. Chem. 138, 917–922 (2007). https://doi.org/10.1007/s00706-007-0671-9
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DOI: https://doi.org/10.1007/s00706-007-0671-9