反应详情

温度

-78 °C

N-tert-Butylthiophene-2-sulfonamide (5 g, 0.0228 mol, see Example 1(a) above) was dissolved in THF (43 mL) under N2 and then cooled to −78° C. n-BuLi (1.6 M, 38.5 mL, 0.062 mol) was added via a syringe. The reaction mixture was stirred at −78° C. for 30 min and then at −40° C. for 2 h. Iodo-butane (5.19 mL, 0.046 mol) was added dropwise to the reaction mixture. The reaction mixture was stirred overnight at room temperature, quenched with NH4Cl (aq) and extracted with EtOAc. The combined organic phase was washed with brine, dried and concentrated in vacuo. The crude product was purified on column chromatography (Hex:EtOAc 10:1) to give the sub-title compound in 46% yield (2.92 g, 0.011 mol).

1. additionwas added via a syringe
2. waitat −40° C. for 2 h
3. stirringThe reaction mixture was stirred overnight at room temperature
4. customquenched with NH4Cl (aq)
5. extractionextracted with EtOAc
6. washThe combined organic phase was washed with brine
7. customdried
8. concentrationconcentrated in vacuo
9. customThe crude product was purified on column chromatography (Hex:EtOAc 10:1)