Reaction #531797

Reaction equation

11-bromoundecan-1-ol

sodium azide

→

white solid 32

11-aminoundecan-1-ol

Solvents

acetonitrile

THF

Conditions

Workup

1. 1
   workup.WAITfollowed by 18-hour
2. 2
   Otherreaction
3. 3
   Temperatureby refluxing
4. 4
   Otherthe solid components were removed by filtration
5. 5
   workup.DISTILLATIONThe solvent of the filtrate was distilled away under reduced pressure
6. 6
   Otherto obtain 13.9 g of a transparent, viscous liquid
7. 7
   workup.DISTILLATIONdistilled from calcium hydride in a nitrogen atmosphere
8. 8
   Temperaturewas cooled in an ice bath
9. 9
   DryingLithium aluminum hydride (2.53 g) was then dried
10. 10
    workup.DISSOLUTIONwas dissolved in 250 ml of THF
11. 11
    workup.ADDITIONAfter that, 2.5 ml of ion-exchange water, 3.5 ml of 15 wt % aqueous sodium hydride solution, and 7.5 ml of ion-exchange water were added so as
12. 12
    OtherThe precipitate generated was removed by filtration
13. 13
    workup.DISTILLATIONthe solvent of the filtrate was distilled away under reduced pressure
14. 14
    OtherAfter the filtrate was dried under reduced pressure
15. 15
    workup.DISSOLUTIONthe dried filtrate was dissolved in 60 ml of THF
16. 16
    workup.ADDITIONthe same volume of heptane was added to that
17. 17
    FiltrationThe precipitate generated was collected by filtration

Procedure

11-bromoundecan-1-ol (the compound 31) (15.1 g) was dissolved in 250 ml of acetonitrile, and 15.7 g of sodium azide was added to that, followed by 18-hour reaction caused by refluxing. After cooled down to room temperature, the solid components were removed by filtration. The solvent of the filtrate was distilled away under reduced pressure, to obtain 13.9 g of a transparent, viscous liquid. Of this liquid, 8.34 g was dissolved in 60 ml of THF distilled from calcium hydride in a nitrogen atmosphere, and was cooled in an ice bath. Lithium aluminum hydride (2.53 g) was then dried, and was dissolved in 250 ml of THF. The resultant was dripped, and was then stirred in an ice bath for one hour. After that, 2.5 ml of ion-exchange water, 3.5 ml of 15 wt % aqueous sodium hydride solution, and 7.5 ml of ion-exchange water were added so as to stop reactions. The precipitate generated was removed by filtration, and the solvent of the filtrate was distilled away under reduced pressure. After the filtrate was dried under reduced pressure, the dried filtrate was dissolved in 60 ml of THF, and the same volume of heptane was added to that. The precipitate generated was collected by filtration, to obtain 5.1 g of a white solid 32.

Source