4-Toluenesulfonyl chloride → 3-[2-(p-Toluenesulphonyloxy)ethyl]chroman

関与物質

反応手順

6.29 g (33 mmol) of p-toluenesulphonyl chloride are added while stirring at room temperature to a solution of 5.35 g (30 mmol) of 3-(2-hydroxyethyl)chroman in 30 ml of absolute pyridine, the slightly exothermic reaction being maintained at room temperature by means of an ice bath. After stirring for a further three hours at room temperature, the reaction mixture is poured onto ice-water. The crystals formed are filtered off with suction, washed with water and dried in vacuo. 5.9 g (59.2%) of 3-[2-(p-toluenesulphonyloxy)ethyl]chroman, which melts at 91°-93°, are obtained.

情報源と証拠