反应详情

2 M hydrochloric acid (3.0 mL) was added to a suspension of 83 (0.12 g, 0.35 mmol) in tetrahydrofuran (3.0 mL), and the resulting suspension was warmed to reflux. The reaction became homogeneous upon heating. After refluxing for 1.5 h, the reaction was allowed to cool to room temperature, and then partitioned between diethyl ether and water. The ether layer was washed with water, saturated aqueous sodium bicarbonate, and brine. The ether layer was dried with anhydrous sodium sulfate and concentrated in vacuo. The residue triturated with ethyl acetate, the solvent was removed under a stream of nitrogen, and the resulting solid was dried in vacuo at 55° C. to give 84 (0.086 g, 82%) as a light yellow solid.

1. temperaturethe resulting suspension was warmed to reflux
2. temperatureupon heating
3. temperatureAfter refluxing for 1.5 h
4. custompartitioned between diethyl ether and water
5. washThe ether layer was washed with water, saturated aqueous sodium bicarbonate, and brine
6. dry with materialThe ether layer was dried with anhydrous sodium sulfate
7. concentrationconcentrated in vacuo
8. customThe residue triturated with ethyl acetate
9. customthe solvent was removed under a stream of nitrogen
10. customthe resulting solid was dried in vacuo at 55° C.