反应详情

2,2-Bis-(2-phenylsulfanyl-ethyl)-malonic acid (5.628 g) was heated at 150° C. for 30 minutes. The reaction mixture was cooled to room temperature, dissolved in ethyl acetate and washed with aqueous sodium bicarbonate. The ethyl acetate solution was washed with saturated aqueous sodium chloride and then dried over magnesium sulfate. The solvent was removed by rotary evaporation at reduced pressure and the residue was chromatographed on silica gel eluting with ethyl acetate/hexane to give 4-phenylsulfanyl-2-(2-phenylsulfanyl-ethyl)-butyric acid (1.831 g).

1. washwashed with aqueous sodium bicarbonate
2. washThe ethyl acetate solution was washed with saturated aqueous sodium chloride
3. dry with materialdried over magnesium sulfate
4. customThe solvent was removed by rotary evaporation at reduced pressure
5. customthe residue was chromatographed on silica gel eluting with ethyl acetate/hexane