反应详情

A solution of bleach (100 ml), containing sodium bicarbonate (7.34 g), was added dropwise to a rapidly stirred mixture of 3-hydroxy-4-benzyloxycarbonylamino-tetrahydrofuran (21 g, 88 mmol), sodium bromide (9.4 g), TEMPO (50 mg) in EtOAc (140 ml), toluene (140 ml) and water (40 ml). After a persistant orange colour developed the mixture was extracted with EtOAc and the combined organic layers were washed with saturated sodium bicarbonate, brine and dried (MgSO4). Evaporation under reduced pressure and purification of the residue by column chromatography afforded the title compound as white crystals, 18 g, 87%.

1. extractionwas extracted with EtOAc
2. washthe combined organic layers were washed with saturated sodium bicarbonate, brine
3. dry with materialdried (MgSO4)
4. customEvaporation
5. customunder reduced pressure and purification of the residue by column chromatography