反应详情

To a suspension of LAH (1.0 g) in Et2O (100 mL) at 25° C. was added slowly 4,4,4-trifluoro-2-(2,2,2-trifluoroethyl)-butyric acid ethyl ester (5.0 g, 19.8 mmol). The resulting mixture was stirred at reflux for 4 h. The cooled reaction mixture was quenched by sequential addition of water (1.0 mL), 15% NaOH in water (1.0 mL) and water (3.0 mL). After the resulting mixture was allowed to stir at 25° C. for 17 h, Na2SO4 (20 g) was added and stirring at 25° C. continued for 1 h. The resulting suspension was filtered through a pad of the Celite® reagent and Na2SO4. The filtrate was distilled to remove all solvents to afford the desired product as a colorless liquid (1.7 g, 41%). Mass Spectrum (−ESI): 269 [M+OAc]−.

1. temperatureat reflux for 4 h
2. customThe cooled reaction mixture
3. customwas quenched by sequential addition of water (1.0 mL), 15% NaOH in water (1.0 mL) and water (3.0 mL)
4. stirringto stir at 25° C. for 17 h
5. additionNa2SO4 (20 g) was added
6. stirringstirring at 25° C.
7. filtrationThe resulting suspension was filtered through a pad of the Celite® reagent and Na2SO4
8. distillationThe filtrate was distilled
9. customto remove all solvents