反应详情

[(Tert-butoxy)carbonylamino]-3,4-dihydroxy-N-(phenylmethoxy) butanamide (47 g, 138 mmol), imidazole (37.5 g, 552 mmol) and tert-butyldimethylsilyl chloride (57.7 g, 386.4 mmol) were stirred at 0° C. for 1 h and the room temperature for an additional 1 h in a mixture of dichloromethane (1.7 L) and dimethylformamide (17 mL). Water (250 mL) was added and after decantation, water (2×250 mL) and brine (250 mL) was used for washing the organic phases, which was dried over Na2SO4. After evaporation of the solvent, the residue was purified by column chromatography using a mixture of ethyl acetate/hexane (1/4) as eluent to get 28 g of the desired product.

1. washfor washing the organic phases, which
2. dry with materialwas dried over Na2SO4
3. customAfter evaporation of the solvent
4. customthe residue was purified by column chromatography
5. additiona mixture of ethyl acetate/hexane (1/4) as eluent