The nucleoside derivative zido-2,3-dideoxy-beta-D-ribo-hexofuranosyl)t
hymine has been synthesized from isopropylidene-alpha-D-glucofuranose-
5,6-carbonate in an overall yield of 16%. The key step in the synthesi
s involves the selective deacetylation of a nucleoside derivative havi
ng a cyclic carbonate moiety.