反应详情

A solution of (5R)-5-(2,2-dimethyl-4H-1,3-benzodioxin-6-yl)-3-[6-(2-hydroxyethoxy)hexyl]-1,3-oxazolidin-2-one (200 mg) in DMF (4 ml) under nitrogen was treated with sodium hydride (26 mg, 60% in oil) and the mixture was stirred at 20° for 10 min. 2,6-Dichlorobenzyl bromide (122 mg) was added and the mixture was stirred at 20° for 3 h. Phosphate buffer solution (20 ml, pH6.5) was added and the mixture was extracted with EtOAc (30 ml). The extract was washed with water (2×20 ml), dried (NaSO4) and the solvent evaporated in vacuo to give a residue. The residue was purified by chromatography on flash silica gel 20 mm diameter column. Elution with EtOAc-cyclohexane (1:1) gave the title compound (155 mg). LCMS RT=3.97 min.

1. stirringthe mixture was stirred at 20° for 3 h
2. extractionthe mixture was extracted with EtOAc (30 ml)
3. washThe extract was washed with water (2×20 ml)
4. dry with materialdried (NaSO4)
5. customthe solvent evaporated in vacuo
6. customto give a residue
7. customThe residue was purified by chromatography on flash silica gel 20 mm diameter column
8. washElution with EtOAc-cyclohexane (1:1)