反应详情

温度

-78 °C

Dissolve oxalyl chloride (4.22 g, 33.28 mmol) in methylene chloride (200 mL), place under an argon atmosphere and cool to -78° C. Add, by dropwise addition, dimethylsulfoxide (5.42 g, 69.33 mmol) and stir at -78° C. for 15 minutes. Add, by dropwise addition, a solution of α-[1-(2-phenylethyl)-4-piperidinyl]-2-benzo[b]thiophenemethanol in dimethylsulfoxide (150 mL). Stir at -78° C. for 30 minutes, add triethylamine (15.18 g, 0.150 mol) and stir at -78° C. for 1 hour. Remove the ice bath and stir for an additional 1.5 hours. Evaporate the solvent in vacuo and recrystallize (isopropanol) to give the title compound as a fluffy white crystalline solid; mp 129°-130° C.

1. additionAdd, by dropwise addition
2. stirringStir at -78° C. for 30 minutes
3. stirringstir at -78° C. for 1 hour
4. customRemove the ice bath
5. stirringstir for an additional 1.5 hours
6. customEvaporate the solvent in vacuo
7. customrecrystallize (isopropanol)