反应详情

To a solution of racemic (R/S)-1-(4-iodo-5-methoxy-2-nitrophenyl)-2,2-dimethyl-1-propanol (395 mg, 1.1 mmol) and DMAP (263 mg, 2.16 mmol) in anhydrous CH2Cl2 (5.0 mL), (1S)-camphanic chloride (Corrie et al., 1992, which is incorporated by reference) (350 mg, 1.62 mmol) was added, and the mixture was stirred overnight at room temperature under a nitrogen atmosphere. The reaction mixture was diluted with CH2Cl2 (50 mL) and washed with saturated NaHCO3 solution (50 mL). The organic phase was dried over Na2SO4, concentrated in vacuo, and the residue was purified by silica gel column chromatography to yield (R/S)-1-(4-iodo-5-methoxy-2-nitrophenyl)-2,2-dimethyl-1-propyl (1S)-camphanate (490 mg, 80%, 1:1 mixture of diastereomers).

1. washwashed with saturated NaHCO3 solution (50 mL)
2. dry with materialThe organic phase was dried over Na2SO4
3. concentrationconcentrated in vacuo
4. customthe residue was purified by silica gel column chromatography