Synthesis of 4-Substituted Pyrimidine 2′,3′-Dideoxynucleosides

Abstract Reaction of 5′-0-(4,4′-dimethoxytriphenylmethyl)-3′-deoxythy-midine with triphenylphosphine/carbon tetrachloride, followed by deprotection of the 5′-hydroxyl group, afforded the 4-chloro derivative 3 from which some 4-substituted pyrimidin-2(1H)one-2′, 3′-dideoxyribosides were obtained by nucleo-philic substitution under very mild conditions.

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