反应详情

温度

100 °C

16.62 g (100 mmol) of 3-(4-hydroxyphenyl)-propionic acid is dissolved with stirring and covering with argon in 45 ml (225.0 mmol) of 5N sodium hydroxide solution, and 15.73 g (100 mmol), (98%) of diethyl sulfate is instilled quickly so that the temperature does not exceed 40° C. (water cooling). After completion of the addition, it is heated for 30 more minutes to 100° C. After the cooling, it is extracted with diethyl ether, then acidified with sulfuric acid to pH 4 and the precipitated compound in ether is taken up. After drying on sodium sulfate, it is evaporated to dryness in a vacuum. The title compound is obtained as solid. Yield: 15.21 g (78.3% of theory) Elementary analysis: Cld: C 68.02 H 7.26 Fnd: C 68.13 H 7.34

1. customdoes not exceed 40° C.
2. additionAfter completion of the addition, it
3. extractionAfter the cooling, it is extracted with diethyl ether
4. customAfter drying on sodium sulfate, it
5. customis evaporated to dryness in a vacuum