Dimethyl Sulfide → 2-(2,4-Dichlorophenylethenyl)-2-(1-propylmercaptocyclopropyl) oxirane

Participants

Reaction Steps

30 ml (0.41 mol) of dimethyl sulphide and 43.5 g (0.35 mol) of dimethyl sulphate are added to 60 ml of tert.-butanol and allowed to stand at room temperature for 14 hours. A solution of 40 g (0.13 mol) of 2,4-dichlorophenylethenyl 1-propylmercaptocyclopropyl ketone in 120 ml of tert.-butanol is first added to the reaction mixture with stirring and 39.1 g of potassium hydroxide powder are then introduced, while keeping the temperature of the reaction mixture at 20° to 30° C. The mixture is stirred at 30 C. for 3 hours more, then the dimethyl sulphide is removed under reduced pressure and the reaction mixture is then poured into 70 ml of a 1% strength aqueous hydrogen peroxide solution. The mixture is extracted with ethyl acetate. The organic phase is washed with water and concentrated by removing the solvent under reduced pressure after drying over sodium sulphate. In this manner, 38.2 g (91% of theory) of 2-(2,4-dichlorophenylethenyl)-2-(1-propylmercaptocyclopropyl)-oxirane are obtained in the form of an oily product, which is reacted further without additional purification. ##STR73##

Provenance & Evidence