反应详情

To the mixture obtained in Example 1C (0.2 mol) in 130 mL CH2Cl2 at ambient temperature was added Et3N (33.5 mL, 0.24 mol) followed by CH3NO2 (13 mL, 0.24 mol). The mixture stirred at ambient temperature for 8 h then was diluted with CH2Cl2, the layers were separated and the organic layer was washed with 20 mL 5% H2SO4 and 20 mL brine. The organic layer was dried over anhydrous Na2SO4, concentrated and purified via column chromatography (SiO2, 50% hexanes-EtOAc) to give 10.2 g of the title compound (36.9 mmol). MS (DCl/NH3) m/z 277 (M+H)+.

1. customthe layers were separated
2. washthe organic layer was washed with 20 mL 5% H2SO4 and 20 mL brine
3. dry with materialThe organic layer was dried over anhydrous Na2SO4
4. concentrationconcentrated
5. custompurified via column chromatography (SiO2, 50% hexanes-EtOAc)