3'-Azido-2',3'-dideoxyuridines 6 and their corresponding cc anomers 5
were synthesized by condensation of silylated 6-alkyl and 5,6-dialkyl
substituted uracils 2 with methyl l-2,3-dideoxy-alpha-beta-D-erythro-p
entofuranoside (4). Compounds 5 and 6 were treated with tetrabutylammo
nium fluoride to obtain the deprotected nucleosides 7 and 8, respectiv
ely.