Abstract
Reaction of (diethylamino)sulfur trifluoride (DAST) with methyl-5-O-benzyl-β-D-arabinofuranoside (1) in CH2Cl2 at room temperature for 3-5 h, followed by silica gel column chromatography afforded ribo2 and lyxo3 fluorides in 41 and 21% yield, respectively. Under similar conditions with xylo-isomer 4 as starting material, epoxide 5 and ribo fluoride 6 were isolated in 33 and 36% yield, respectively.
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