反应详情

(3R,4R,5R)-3-Benzyloxy-5-hydroxymethyl4-piperidinol (0.1 g, 0.4 mmol) was dissolved in pyridine (0.5 ml) at 0° C. by and acetic anhydride (0.5 ml) was added dropwise over 1 min. Stirring at room temperature for 20 h and evaporation to dryness gave a crude product which was purified on silica gel using ethanol as eluent (yield 55%). The purified 3-benzyloxy-3-acetoxy-5-acetoxymethyl-1-acetylpiperidine (75 mg) was debenzylated in methanol at room temperature using 10% Pd/C as catalyst. Filtration and evaporation to dryness gave 50 mg of crude 4-acetoxy-5-acetoxymethyl-1-acetyl-3-piperidinol which was dissolved in dry methanol (4 ml) containing 50 μl of a 1% sodium methoxide in methanol. After stirring at room temperature for 4 days the solution was evaporated to dryness to give (3R,4R,5R)-1-acetyl-5-hydroxymethyl-3,4-piperidinediol (Yield: 35 mg).

1. additionwas added dropwise over 1 min
2. customevaporation to dryness
3. customgave a crude product which
4. customwas purified on silica gel
5. customwas debenzylated in methanol at room temperature
6. filtrationFiltration and evaporation to dryness