反应详情

38.16 g (0.2 mol) of p-toluenesulphonyl chloride are added at room temperature while stirring to a solution of 31 g (0.189 mol) of 2-hydroxymethylchroman in 110 ml of absolute pyridine, the slightly exothermic reaction being maintained at room temperature by means of an ice bath. The reaction mixture is stirred for a further 3 hours at room temperature and then poured onto ice-water. The oil which separates out is removed by decanting the aqueous phase, dissolved in diethyl ether and washed with ice-cold 2N hydrochloric acid and ice-water. The ethereal phases are dried over sodium sulphate and concentrated by evaporation in vacuo. 58.15 g (96.6%) of 2-(p-toluenesulphonyloxymethyl)chroman are obtained in the form of a colourless oil.

1. customthe slightly exothermic reaction
2. additionpoured onto ice-water
3. customThe oil which separates out is removed
4. customby decanting the aqueous phase
5. dissolutiondissolved in diethyl ether
6. washwashed with ice-cold 2N hydrochloric acid and ice-water
7. dry with materialThe ethereal phases are dried over sodium sulphate
8. concentrationconcentrated by evaporation in vacuo