反应详情

12.53 g (192.5 mmol) of potassium cyanide are added at room temperature to a solution of 55.72 g (175 mmol) of 3-(p-toluenesulphonyloxymethyl)chroman (for manufacture see Example 1) in 300 ml of dimethyl sulphoxide and the whole is heated to 60° while stirring. After 3 hours, ice-water is added to the reaction mixture, the whole is extracted with diethyl ether and washed thoroughly with water. The combined organic phases are dried over sodium sulphate and concentrated by evaporation in vacuo. 26.75 g (88.3%) of 3-cyanomethylchroman are obtained in the form of a pale yellow oil which crystallises from diethyl ether/pentane. The crystals melt at 63°.

1. temperaturethe whole is heated to 60°
2. extractionthe whole is extracted with diethyl ether
3. washwashed thoroughly with water
4. dry with materialThe combined organic phases are dried over sodium sulphate
5. concentrationconcentrated by evaporation in vacuo