E. Larsen et al., SYNTHESIS OF 2,3'-ANHYDRO-2'-DEOXYURIDINES AND 2',3'-DIDEHYDRO-2',3'-DIDEOXYURIDINES USING POLYMER-SUPPORTED FLUORIDE, Synthesis, (9), 1995, pp. 1121
Reaction of methyl luenesulfonyl-alpha,beta-D-erythro-pentofuranoside
(2) with silylated uracils 3 using trimethylsilyl trifluoromethanesulf
onate (TMS triflate) as catalyst afforded after crystallization in Et(
2)O the corresponding beta-nucleosides 4. Reaction of 4 with tetrabuty
lammonium fluoride (TBAF) or Amberlyst A-26 resin (F--form) in THF at
room temperature or at reflux gave the corresponding deprotected 2,3'-
anhydro-2'-deoxyuridines 6 and 2',3'-didehydro-2',3'-dideoxyuridines 7
, respectively.