反应详情

A solution of triphenylsulfonium bromide (6.87 g, 20.0 mmol) and p-toluenesulfonic acid (3.80 g, 20.0 mmol) in water (100 ml) was heated at a gentle reflux for 15 hours under nitrogen. After cooling to room temperature, the clear solution was extracted with dichloromethane (4×75 ml). The combined organic extracts were washed with water until neutral (4×75 ml) and dried (MgSO4 ). The solvent was removed under reduced pressure and the residue dried by heating at 80° C. in vacuo for 36 hours to give a crude onium salt as a off-white solid (6.35 g). Recrystallization from acetone-ethyl acetate gave triphenylsulfonium rosylate as a white crystalline solid (5.72 g, 66%).

1. temperaturea gentle reflux for 15 hours under nitrogen
2. extractionthe clear solution was extracted with dichloromethane (4×75 ml)
3. washThe combined organic extracts were washed with water until neutral (4×75 ml)
4. dry with materialdried (MgSO4 )
5. customThe solvent was removed under reduced pressure
6. customthe residue dried
7. temperatureby heating at 80° C. in vacuo for 36 hours