反应详情

A stirred solution of sulfonamide 203 (23 mg, 31 μmol) in THF (2 mL) is treated with sodium hydride (2 mg, 46 μmol, 60% dispersion in mineral oil) at 0° C. After warming to RT and stirring 0.5 h, iodomethane (10 μL, 0.15 mmol) is added via syringe and the reaction stirred 2 h. Analysis by LC/MS at this juncture revealed the reaction is only 40% complete. Hence more sodium hydride (6 mg, 0.15 mmol, 60% dispersion in mineral oil) is added, followed after 0.5 h by iodomethane (30 μL, 0.46 mmol). After a further 16 h at RT, the reaction is diluted with water (10 mL) and extracted into EtOAc (3×15 mL). The combined EtOAc phases are dried (Na2SO4) and reduced in vacuo to afford the title compound.

1. stirringthe reaction stirred 2 h
2. waitAfter a further 16 h at RT
3. extractionextracted into EtOAc (3×15 mL)
4. dry with materialThe combined EtOAc phases are dried (Na2SO4)