Hydrogen Peroxide → 1-O-(2,3,4-tri-O-benzyl-6-O-tosyl-alpha-D-glucopyranosyl)propane-1,3-diol

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Reaction Steps

To a solution of the compound (5) (29.0 g, 45.0 mmol) in anhydrous tetrahydrofuran (THF, 150 ml), added was a solution of 0.5 M 9-borabicyclo[3,3,1]nonane (9-BBN) in tetrahydrofuran (180 ml, 90.0 mmol) at 0° C. in an argon atmosphere. After a lapse of 1 hour, the reaction liquid was returned to room temperature, and continuously stirred for 10 hours. The reaction liquid was cooled again to 0° C., to which water (20 ml) was added firstly, and then 3 M sodium hydroxide solution (70 ml) and 35% hydrogen peroxide solution (70 ml) were added sequentially. After a lapse of 1 hour, the reaction liquid was returned to room temperature, and stirred for 12 hours. After the sufficient progress of the reaction was confirmed, the solution was extracted with ethyl acetate (3×100 ml), the organic layers were combined and washed with saturated saline (2×100 ml), dried with sodium sulfate, filtered, and concentrated under reduced pressure. The obtained residue was purified with silica gel chromatography (hexane-ethyl acetate, 3:2→1:1→2:3) to obtain the title compound (6) in the form of a colorless oily substance {28.2 g (42.5 mmol), 94.4%}.

Provenance & Evidence