Cytidine, 3'-azido-2',3'-dideoxy- → 84472-90-2

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Reaction Steps

An alternate synthesis of compound (XIII) involves treatment of 3,-azido-5'-0-acetyl-2',3'-dideoxyuridine (X) with 4-chlorophenylphosphorodichloridate and 1,2,4-triazole in pyridine at room temperature for 3 days to give the 4-trizolylpyrimidinone derivative. Subsequent treatment with aqueous ammonia in dioxane (1:3 v/v) for 4 hours, then saturated methanolic ammonia overnight at room temperature, yields the 3'-azido analog (XII). Compound (XII) is then reduced under 50 psi of hydrogen in the presence of 10% palladium on charcoal at room temperature for 6 hours to obtain the desired 3'amino-2',3'-dideoxycytidine derivative (XIII).

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