Add time:09/24/2019 Source:sciencedirect.com
5-Pivaloyloxymethyluridine and its 2-thio analogue have been utilized as convenient substrates for the synthesis of various 5-methyluridines (xm5U) and 5-methyl-2-thiouridines (xm5s2U). The pivaloyloxy group (OPiv) located at the pseudobenzylic position was effectively substituted with a series of nucleophiles: ammonia, primary and secondary amines including secondary cyclic amines, tetrabutylammonium salts of amino acids, an alkoxide and a thiolate.
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