反応 #833548

反応方程式

LAH

1-(5′,5′-dimethylcyclohex-1′-enyl)ethanone

→

1-(5′,5′-dimethylcyclohex-1′-enyl)ethanol

収率 85.0%

溶媒

Et2O

Et2O

反応条件

後処理

1. 1
   温度The reaction mixture was refluxed for 1 h
2. 2
   その他to quenching at 0° C. by careful addition of water (50 ml)
3. 3
   その他The organic layer was separated
4. 4
   抽出the aqueous one extracted with Et2O
5. 5
   洗浄The combined ethereal solutions were washed with water and brine
6. 6
   乾燥dried (Na2SO4)
7. 7
   濃縮concentrated in a rotary evaporator

実験手順

A solution of 1-(5′,5′-dimethylcyclohex-1′-enyl)ethanone (13.1 g, 85.8 mmol) in Et2O (50 ml) was added dropwise with stirring within 50 min. to a suspension of LAH (895 mg, 23.6 mmol) in Et2O (150 ml). The reaction mixture was refluxed for 1 h prior to quenching at 0° C. by careful addition of water (50 ml) followed by 5 N aq. HCl (50 ml). The organic layer was separated and the aqueous one extracted with Et2O. The combined ethereal solutions were washed with water and brine, dried (Na2SO4), and concentrated in a rotary evaporator. Silica-gel FC (pentane/Et2O, 9:1, Rf=0.14) of the resulting residue (14.7 g) gave 11.2 g (85%) of 1-(5′,5′-dimethylcyclohex-1′-enyl)ethanol.

出典