反应详情

温度

-78 °C

To a solution of N-[2-[tert-butyl(dimethyl)silyl]oxyethyl]-1-phenyl-methanesulfonamide (33 g, 100.2 mmol) in tetrahydrofuran (334 mL) at −78° C. was slowly added n-BuLi (2.5 M in hexanes) (100 mL, 250 mmol) via cannula and the reaction was stirred at −78° C. was 2 hours. Chloroiodomethane (8.3 mL, 110 mmol) was then slowly added and the reaction was stirred at −78° C. for one hour, then allowed to warm to room temperature and aged for 16 hours. The reaction was then quenched with saturated NH4Cl and extracted with dichloromethane, dried with MgSO4, concentrated and purified by silica gel column chromatography (0-60% EtOAc in heptane) to give N-[2-[tert-butyl(dimethyl)silyl]oxyethyl]-1-phenyl-ethenesulfonamide (24 g, 70% yield). LCMS (ESI), m/z, 342. [M+H]+.

1. customat −78° C.
2. stirringthe reaction was stirred at −78° C. for one hour
3. temperatureto warm to room temperature and aged for 16 hours
4. customThe reaction was then quenched with saturated NH4Cl
5. extractionextracted with dichloromethane
6. dry with materialdried with MgSO4
7. concentrationconcentrated
8. custompurified by silica gel column chromatography (0-60% EtOAc in heptane)