反应详情

To a solution of 5-trimethylsilyl-4-methoxythiophene-2-sulfonamide (770 mg, 2.90 mmol) in THF (10 mL) is added a solution of tetra-butylammonium fluoride (17.4 mL of 1 M in THF, 17.4 mmol). The reaction mixture is stirred at room temperature for 2 hr. The THF is removed under reduced pressure. The residue is dissolved in EtOAc (200 mL). The organic layer is washed with brine then dried (Na2SO4), filtered and concentrated in vacuo. The crude product is chromatographed on silica gel, eluting with Hex:EtOAc (3:1) to afford the title compound (480 mg, 86%).

1. customThe THF is removed under reduced pressure
2. dissolutionThe residue is dissolved in EtOAc (200 mL)
3. washThe organic layer is washed with brine
4. dry with materialthen dried (Na2SO4)
5. filtrationfiltered
6. concentrationconcentrated in vacuo
7. customThe crude product is chromatographed on silica gel
8. washeluting with Hex