Abstract The reaction of silylated 6-substituted uracils 5 with methyl 2, 3, 5-tri-O-benzoyl-α-D- arabinofuranoside (3) in the presence of trimethylsilyl trifluoromethanesulfonate (TMS triflate) afforded a mixture of the corresponding protected N 1, N 3-bis (arabinofuranosyl) uracils 6 and the 6-substituted 2, 3, 5-tri-O-benzoyl-α-D-arabinofuranosyluracils 8. Deprotection of 6 and 8 gave the corresponding α nucleosides 7 and 9. The reaction of ...
