Reaktion #684729

Reaktionsgleichung

2,2,6,6-tetramethylpiperidin-4-ol

n-dodecyl bromide

→

1-n-dodecyl-2,2,6,6-tetramethylpiperidin-4-ol

Lösungsmittel

ethyl alcohol

Reaktionsbedingungen

Aufarbeitung

1. 1
   Temperaturwas heated under reflux conditions for 72 hours
2. 2
   SonstigeThe cooled reaction mixture
3. 3
   Filtrationwas filtered
4. 4
   Sonstigeto remove 2,2,6,6-tetramethylpiperidin-4-ol hydrobromide
5. 5
   Sonstigeformed during the reaction
6. 6
   Sonstigethe ethyl alcohol solvent was removed by distillation under reduced pressure
7. 7
   workup.ADDITIONThe residue was treated with petroleum under (b.p. 40°-60°C)
8. 8
   Filtrationfiltered
9. 9
   Sonstigeto remove the unreacted 2,2,6,6-tetramethylpiperidin-4-ol
10. 10
    Sonstigethe petroleum ether solvent was removed by distillation under reduced pressure
11. 11
    workup.DISTILLATIONFractional distillation of the residue

Vorschrift

A mixture of 15.7 parts of 2,2,6,6-tetramethylpiperidin-4-ol and 12.5 parts of n-dodecyl bromide in 50 parts of ethyl alcohol was heated under reflux conditions for 72 hours. The cooled reaction mixture was filtered to remove 2,2,6,6-tetramethylpiperidin-4-ol hydrobromide formed during the reaction and the ethyl alcohol solvent was removed by distillation under reduced pressure. The residue was treated with petroleum under (b.p. 40°-60°C) and filtered to remove the unreacted 2,2,6,6-tetramethylpiperidin-4-ol and the petroleum ether solvent was removed by distillation under reduced pressure. Fractional distillation of the residue gave 1-n-dodecyl-2,2,6,6-tetramethylpiperidin-4-ol having a melting point of 41°-2°C and the following elemental analysis by weight:

Quelle