反応 #531792

反応方程式

11-bromoundecan-1-ol

p-cresol

water

potassium hydroxide

→

11-(p-tolyloxy)undecan-1-ol

収率 100.0%

溶媒

ethanol

methylene chloride

反応条件

後処理

1. 1
   workup.WAITfollowed by 24-hour
2. 2
   温度refluxing
3. 3
   その他the reaction solution is moved into a separating funnel
4. 4
   その他separation
5. 5
   その他After the organic phase was collected
6. 6
   その他the desiccant agent was removed by filtration
7. 7
   workup.DISTILLATIONthe solvent of the filtrate was distilled away under reduced pressure
8. 8
   workup.DISSOLUTIONThe resultant solid was re-dissolved in 50 ml of toluene
9. 9
   洗浄was washed twice with 10 wt % of aqueous potassium hydroxide solution
10. 10
    洗浄was then washed with 50 ml of saturated saline
11. 11
    その他After that, the organic phase was collected
12. 12
    その他The desiccant agent was removed by filtration
13. 13
    workup.DISTILLATIONthe solvent of the filtrate was distilled away under reduced pressure

実験手順

The 11-bromoundecan-1-ol 15 (3.68 g) and 4.88 g of p-cresol were dissolved in 20 ml of ethanol, and 2.57 g of potassium hydroxide was added to that, followed by 24-hour refluxing. After cooled to room temperature, the reaction solution is moved into a separating funnel, and 100 ml of ion-exchange water and 50 ml of methylene chloride were added so as to cause separation. After the organic phase was collected and was dehydrated with sodium sulfate, the desiccant agent was removed by filtration, and the solvent of the filtrate was distilled away under reduced pressure. The resultant solid was re-dissolved in 50 ml of toluene, and was washed twice with 10 wt % of aqueous potassium hydroxide solution, and was then washed with 50 ml of saturated saline. After that, the organic phase was collected, and was dehydrated with sodium sulfate. The desiccant agent was removed by filtration, and the solvent of the filtrate was distilled away under reduced pressure, to obtain 4.08 g of 11-(p-tolyloxy)undecan-1-ol 16, which is a white solid.

出典