反应详情

A solution of 5-benzyloxy-6-methoxyindole (990 mg, 3.9 mmol) in DMF (3 mL) was added to a solution of NaH (234 mg, 5.9 mmol, 60% in oil) in DMF (1 mL) at 0° C. The ice bath was removed, and the reaction mixture allowed to stir at RT for 30 min. The reaction flask was cooled to 0° C. and PhSO2Cl (0.6 mL, 4.7 mmol) was added via syringe. The ice bath was removed and the reaction mixture stirred at RT for 24 h. Water (25 mL) was added and the aqueous layer extracted with Et2O (4×50 mL). The combined organic extracts were washed with brine, dried over Na2SO4, filtered and concentrated in vacuo to give an oil. The residue was purified by column chromatography (25% then 40% EtOAc/hex) to furnish N-phenylsulfonyl 5-benzyloxy-6-methoxyindole as a crystalline solid (1.38 g, 90% yield).

1. customThe ice bath was removed
2. temperatureThe reaction flask was cooled to 0° C.
3. customThe ice bath was removed
4. stirringthe reaction mixture stirred at RT for 24 h
5. additionWater (25 mL) was added
6. extractionthe aqueous layer extracted with Et2O (4×50 mL)
7. washThe combined organic extracts were washed with brine
8. dry with materialdried over Na2SO4
9. filtrationfiltered
10. concentrationconcentrated in vacuo
11. customto give an oil
12. customThe residue was purified by column chromatography (25%