反应详情

温度

80 °C

A mixture of 4-benzyl-dihydrofuran-2-one (1.0 g, 5.6 mmol), acetic acid (1.7 mL), HBr (33% in acetic acid, 2.0 mL) is heated at 80° C. for 4 h. The mixture is cooled to room temperature, poured into ice-water (20 mL), and extracted with chloroform (2×30 mL). The combined organic extracts are washed with water and brine, dried with anhydrous sodium sulfate, filtered, and concentrated in vacuo to yield 3-benzyl-4-bromo-butyric acid, 1.5 g (99%), as a colorless liquid.

1. temperatureThe mixture is cooled to room temperature
2. extractionextracted with chloroform (2×30 mL)
3. washThe combined organic extracts are washed with water and brine
4. dry with materialdried with anhydrous sodium sulfate
5. filtrationfiltered
6. concentrationconcentrated in vacuo