反应详情

温度

0 °C

To a solution of 3,5-dimethylbenzothiophene (Intermediate 12) (5.0 g, 33.8 mmol) in CHCl3 (70 mL), chlorosulfonic acid (5.6 mL, 85 mmol) was added dropwise at −5° C. The reaction mixture was stirred at 0° C. for 3 h before it was poured into a mixture of ice and NaHCO3 and stirred vigorously for 5 min. The organic phase was immediately separated, dried with MgSO4 and concentrated yielding 3.5 g (40%) of the title compound.

1. stirringstirred vigorously for 5 min
2. customThe organic phase was immediately separated
3. dry with materialdried with MgSO4
4. concentrationconcentrated