Réaction #7317

Équation de réaction

hydrogen bromide

1,3-dibromoadamantane

aluminum bromide

1,3-dibromobenzene

→

1,3-bis(3,5-dibromophenyl)adamantane

Rendement 194.3%

Conditions de réaction

Traitement

1. 1
   AutreAfter the air inside a 1 litter flask equipped with a thermometer and stirrer
2. 2
   Températurewas cooled to 5° C. in advance
3. 3
   Autrereacted at an inside temperature of 0 to 10° C. for 7 hours
4. 4
   Autrewas absorbed into an aqueous alkaline solution for the removal of its toxicity
5. 5
   AutreAfter the completion of the reaction, 130 g of 4% by weight hydrochloric acid
6. 6
   workup.ADDITIONwas slowly dropped
7. 7
   workup.STIRRINGthe solution was stirred until the orange color of the reaction solution
8. 8
   Autreseparated by funnel
9. 9
   LavageThe resulting organic phase was washed with water three times
10. 10
    workup.ADDITION190 grams of toluene was added to the organic phase after the washing, which
11. 11
    Températurewas then warmed
12. 12
    Autreto remove water
13. 13
    Températureunder reflux
14. 14
    TempératureThen, the organic solution was cooled
15. 15
    Filtrationthe crystal deposited was collected by filtration
16. 16
    Lavageto washing with toluene, methanol and water
17. 17
    Autreby drying under reduced pressure

Mode opératoire

After the air inside a 1 litter flask equipped with a thermometer and stirrer was replaced by nitrogen, 43 g of 1,3-dibromoadamantane and 10 g of anhydrous aluminum bromide were placed therein, and then the inside of the flask was cooled to 0° C. Thereto was added 190 g of 1,3-dibromobenzene that was cooled to 5° C. in advance, and the resulting material was agitated and reacted at an inside temperature of 0 to 10° C. for 7 hours. The reaction was carried out while the hydrogen bromide gas that was generated during the reaction was absorbed into an aqueous alkaline solution for the removal of its toxicity. After the completion of the reaction, 130 g of 4% by weight hydrochloric acid was slowly dropped and then the solution was stirred until the orange color of the reaction solution faded away. The agitation was stopped and the resulting solution was allowed to stand and then separated by funnel. The resulting organic phase was washed with water three times. 190 grams of toluene was added to the organic phase after the washing, which was then warmed to remove water under reflux. Then, the organic solution was cooled and the crystal deposited was collected by filtration. The resulting crystal was subjected to washing with toluene, methanol and water, followed by drying under reduced pressure to obtain 44 g of 1,3-bis(3,5-dibromophenyl)adamantane.

Source