反应详情

A solution of 10 mL of polyphosphoric acid (PPA) in chlorobenzene (200 mL) was heated to reflux. To this solution 1-(p-tolylsulfanyl)-propan-2-one 5.0 g (20.3 mmol) was added in portions within 20 minutes. The resulting mixture was refluxed for 18 h and then cooled to room temperature. The organic phase was separated and concentrated under reduced pressure. The oily residue was purified by flash chromatography on silica gel (90:10 hexane/EtOAc) to give 3.72 g (81%) the title compound.

1. temperatureThe resulting mixture was refluxed for 18 h
2. customThe organic phase was separated
3. concentrationconcentrated under reduced pressure
4. customThe oily residue was purified by flash chromatography on silica gel (90:10 hexane/EtOAc)