反应详情

温度

-30 °C

Sodium hydride (60% dispersion in mineral oil; 40 mg, 0.600 mmol) was added to a solution of tert-butyl (3R,6S)-6-(2,3-difluorophenyl)-2-oxoazepan-3-ylcarbamate (170 mg, 0.500 mmol) in N,N-dimethylformamide (4 mL) at 0° C. After 5 min the mixture was cooled to −30° C. and 1-iodo-2-(methylthio)ethane [prepared according to known procedures: J. Org. Chem., 1987, 52, 2299-2301 (158 mg, 0.782 mmol)] was added. Additional sodium hydride (33 mg, 0.50 mmol) was added and after 4 h excess sodium hydride (33 mg, 0.50 mmol) and 1-iodo-2-(methylthio)ethane (75.6 mg, 0.374 mmol) were added. After 3 h, the final portions of sodium hydride (33 mg, 0.50 mmol) and 1-iodo-2-(methylthio)ethane (75.6 mg, 0.374 mmol) were added and the mixture stirred at −20° C. overnight. The reaction was quenched with water and the mixture was extracted with ethyl acetate. The organic layer was washed with water (3×), saturated brine, dried over magnesium sulfate, filtered and concentrated. Purification by silica gel chromatography (0% ethyl acetate/hexanes→50% ethyl acetate/hexanes) gave the title compound (77 mg). MS 415 (M+1).

1. additionwere added
2. customThe reaction was quenched with water
3. extractionthe mixture was extracted with ethyl acetate
4. washThe organic layer was washed with water (3×), saturated brine
5. dry with materialdried over magnesium sulfate
6. filtrationfiltered
7. concentrationconcentrated
8. customPurification by silica gel chromatography (0% ethyl acetate/hexanes→50% ethyl acetate/hexanes)