Water → Phenyl 6-O-(4-azido-3-chlorobenzyl)-2,3,4-tri-O-(4-methoxybenzyl)-1-thio-beta-D-glucopyranoside

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Reaction Steps

To a solution of phenyl 2,3,4-tri-O-(4-methoxybenzyl)-1-thio-β-D-glucopyranoside (8) (1.25 g, 1.98 mmol) and 4-azido-3-chlorobenzyl bromide (584 mg, 2.37 mmol) in DMF (10 ml) was added sodium hydride (60% in oil, 95 mg, 2.37 mmol), and the resulting mixture was stirred at room temperature for 3 hr. Cold water was added and the mixture was extracted twice with ether. The combined ether layers were washed with water and saturated brine and dried over anhydrous sodium sulfate. The solvent was evaporated under reduced pressure and the residue obtained was purified by silica gel column chromatography (eluent; hexane:ethyl acetate=4:1) to give phenyl 6-O-(4-azido-3-chlorobenzyl)-2,3,4-tri-O-(4-methoxybenzyl)-1-thio-β-D-glucopyranoside (9) as white crystals (1.25 g, yield 79%).

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