反応 #2006436

反応方程式

1-ethyl-2-methoxycyclohexanol

n-butyllithium

hexane

methacryloyl chloride

→

1-ethyl-2-methoxycyclohexyl methacrylate

溶媒

—

ice water

ether

ether

反応条件

後処理

1. 1
   その他equipped with a water condenser, addition funnel and a nitrogen inlet
2. 2
   温度This solution was cooled in an ice/water bath
3. 3
   温度heated
4. 4
   温度to reflux for 30 minutes
5. 5
   温度The reaction mixture was cooled to room temperature
6. 6
   その他quenched with 125 ml of deionized water
7. 7
   その他The organic phase was separated
8. 8
   抽出the water phase was extracted with 50 ml ether
9. 9
   洗浄The combined ether solutions were washed with 100 ml brine
10. 10
    乾燥dried over anhydrous magnesium sulfate
11. 11
    その他The solvent was removed in a rotary evaporator
12. 12
    その他the crude product was chromatographed on a neutral alumina column

実験手順

1-ethyl-2-methoxycyclohexanol from the previous step (10 g, 0.063 mole) in 50 ml ether was placed in a three neck flask equipped with a water condenser, addition funnel and a nitrogen inlet. This solution was cooled in an ice/water bath and n-butyllithium, 1.6 molar in hexane (45 ml, 0.072 mole) was added dropwise. The contents were allowed to warm to room temperature and stirred for 30 minutes. The mixture was cooled again in ice/water bath and methacryloyl chloride (7.31 g, 0.070 mole) in 25 ml ether was added dropwise and heated to reflux for 30 minutes. The reaction mixture was cooled to room temperature and quenched with 125 ml of deionized water. The organic phase was separated and the water phase was extracted with 50 ml ether. The combined ether solutions were washed with 100 ml brine and dried over anhydrous magnesium sulfate. The solvent was removed in a rotary evaporator and the crude product was chromatographed on a neutral alumina column using hexane as elutant. The product was a clear liquid (9.79 g) which was characterized by NMR and IR.

出典