反应详情

To a stirred solution of (±)-5-methyl-5-phenylhydantoin (3.0 g, 15.7 mmol) in DMF (20 mL) was added potassium carbonate (2.6 g, 18.9 mmol) and 2-iodopropane (3.2 g, 18.9 mmol). The reaction was stirred at ambient temperature for 18 h and then partitioned between EtOAc (100 mL) and H2O (100 mL). The layers were separated and the aqueous phase was extracted further with EtOAc (2×100 mL). The combined organic extracts were washed with brine (100 mL), dried over MgSO4, filtered and concentrated under reduced pressure. The crude product was purified by silica gel chromatography, eluting with a gradient of hexane:EtOAc—75:25 to 50:50, to give the title compound. MS: m/z=233 (M+1).

1. custompartitioned between EtOAc (100 mL) and H2O (100 mL)
2. customThe layers were separated
3. extractionthe aqueous phase was extracted further with EtOAc (2×100 mL)
4. washThe combined organic extracts were washed with brine (100 mL)
5. dry with materialdried over MgSO4
6. filtrationfiltered
7. concentrationconcentrated under reduced pressure
8. customThe crude product was purified by silica gel chromatography
9. washeluting with a gradient of hexane