Fl. Van Delft et al., Preparation of 2,5-anhydrohexitols - (Part II). Intramolecular nucleophilic substitution of cyclic sulfates, J CARB CHEM, 18(2), 1999, pp. 191-207
The 2-O-acetyl-3,4-di-O-benzyl-5,6-O-cyclic sulfates 5, 16 and 25, derived
from D-arabinose, D-ribose and D-xylose, respectively, are useful precursor
s in the synthesis of 2,5-anhydrohexitols. 5-Exo-tet cyclization of compoun
ds 5, 16, and 25 under the influence of base leads to the predominant or ex
clusive formation of the corresponding tetrahydrofuran derivatives.