反応 #833530

反応方程式

n-butyl lithium

n-butyl lithium

chloroacetic acid

water

2-(5-norbornen-2-yl)-2-propanol

→

white crystalline material

収率 31.4%

Glycolic acid 2-(5-norbornen-2-yl)-2-propyl ether

収率 31.4%

溶媒

toluene

toluene

反応条件

後処理

1. 1
   その他equipped with a magnetic stirrer, an addition funnel, and a condenser with a nitrogen inlet
2. 2
   その他An exothermic reaction
3. 3
   温度The contents were heated
4. 4
   温度to reflux for about 20 hours
5. 5
   温度After cooling to room temperature
6. 6
   workup.STIRRINGstirred
7. 7
   その他The water phase was collected
8. 8
   洗浄washed with ether (100 ml)
9. 9
   抽出The cloudy solution was extracted twice with ether (100 ml)
10. 10
    洗浄the combined ether solutions washed with brine (100 ml)
11. 11
    乾燥dried over anhydrous magnesium sulfate
12. 12
    その他The solvent was removed
13. 13
    その他the residue was recrystallized from a small amount of hexane

実験手順

2-(5-norbornen-2-yl)-2-propanol (15.20 g, 0.10 mole) (JSR Corp., Japan) and toluene (100 ml) were added to a three-necked 500 ml round bottomed flask equipped with a magnetic stirrer, an addition funnel, and a condenser with a nitrogen inlet. The addition funnel was charged with n-butyl lithium (1.6M in hexane, 62.50 ml, 0.10 mole). The n-butyl lithium was added drop wise while stirring at room temperature. An exothermic reaction occurred. Afterwards, chloroacetic acid (4.75 g, 0.05 mole) in toluene (100 ml) was added drop wise. The contents were heated to reflux for about 20 hours. After cooling to room temperature, water (200 ml) was added cautiously and stirred. The water phase was collected, washed with ether (100 ml) and neutralized with 2 molar hydrochloric acid solution. The cloudy solution was extracted twice with ether (100 ml) and the combined ether solutions washed with brine (100 ml) and dried over anhydrous magnesium sulfate. The solvent was removed and the residue was recrystallized from a small amount of hexane to give 3.3 g of white crystalline material (Melting Point: 48.5-49.50° C.).

出典