反应 #607446

反应方程式

2,2,2-trifluoro-1-[4-(trifluoromethyl)phenyl]ethanone

sodium borohydride

NH4Cl

→

2,2,2-trifluoro-1-[4-(trifluoromethyl)phenyl]ethanol

收率 105.1%

溶剂

methanol

反应条件

后处理

1. 1
   温度cooling
2. 2
   workup.STIRRINGwith additional stirring for 10 min
3. 3
   萃取The later was extracted 3 times with 20 mL of EtOAc
4. 4
   洗涤washed with 10 mL of brine
5. 5
   干燥dried over Na2SO4
6. 6
   过滤filtered
7. 7
   其他The solvent was removed under reduced pressure

实验过程

In a 50 mL two-neck flask, 2,2,2-trifluoro-1-[4-(trifluoromethyl)phenyl]ethanone (2.0 g, 8.3 mmol) was dissolved in methanol (8 mL) and sodium borohydride (0.31 g, 8.3 mmol) was added carefully in portions with ice-bath cooling. The resultant colourless solution was stirred at RT for 2 hours and monitored by TLC. Upon the disappearance of all starting material, 5 mL of an aqueous saturated NH4Cl solution was slowly added to the reaction mixture with additional stirring for 10 min. The later was extracted 3 times with 20 mL of EtOAc and the organic fractions were combined and washed with 10 mL of brine, dried over Na2SO4, and filtered. The solvent was removed under reduced pressure to give 2,2,2-trifluoro-1-[4-(trifluoromethyl)phenyl]ethanol (2.13 g, quantitative) as a colourless oil which was used with no further purification.

来源