反应详情

To a solution of N-(2-((Tert-butyldimethylsilyl)oxy)ethyl)-1-phenylethenesulfonamide (717 mg, 2.1 mmol) in tetrahydrofuran (7 mL) at 0° C. was added tetrabutylammonium fluoride (1.0 M in THF) (2.2 mL, 2.2 mmol) dropwise and the reaction was stirred at room temperature for 16 hours. Saturated NH4Cl was then added and the product was extracted with dichloromethane (×2), dried with MgSO4, concentrated and purified by silica gel column chromatography (0-100% EtOAc in heptane) to give 3-phenyl-1,4,5-oxathiazepane 4,4-dioxide (401 mg, 84% yield). (24 g, 70% yield). LCMS (ESI), m/z, 228. [M+H]+. (Reference: P. Hansen, et al. Org. Lett. 2008, 2951).

1. extractionthe product was extracted with dichloromethane (×2)
2. dry with materialdried with MgSO4
3. concentrationconcentrated
4. custompurified by silica gel column chromatography (0-100% EtOAc in heptane)