Reaktion #1063716

Reaktionsgleichung

hydrogen chloride ethanol

1-(6-benzyloxy-2-naphthyl)-2-[2-(N,N-dimethylamino)ethoxy]ethanol

acetic anhydride

potassium carbonate

→

1-acetoxy-1-(6-benzyloxy-2-naphthyl)-2-[2-(N,N-dimethylamino)ethoxy]ethane hydrochloride

Lösungsmittel

water

ethyl acetate

pyridine

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeAfter the completion of the reaction
2. 2
   Sonstigethe solvent was removed by distillation under reduced pressure
3. 3
   SonstigeTo the residue thus obtained
4. 4
   SonstigeThe organic layer was separated
5. 5
   ExtraktionThe aqueous layer was extracted with 30 ml of ethyl acetate
6. 6
   WaschenThe combined organic-layer was washed with water
7. 7
   Trocknena saturated aqueous sodium chloride solution in this order, and dried over anhydrous magnesium sulfate
8. 8
   SonstigeThe solvent was removed by distillation under reduced pressure
9. 9
   SonstigeThe residue thus obtained
10. 10
    workup.STIRRINGThe resulting mixture was stirred at room temperature for 1 hour
11. 11
    FiltrationThe resulting crystals were collected by filtration
12. 12
    Sonstigedried

Vorschrift

In 12 ml of pyridine was suspended 3.0 g of 1-(6-benzyloxy-2-naphthyl)-2-[2-(N,N-dimethylamino)ethoxy]ethanol. To the suspension was added 1.6 ml of acetic anhydride. The resulting mixture was stirred at room temperature for 24 hours. After the completion of the reaction, the solvent was removed by distillation under reduced pressure. To the residue thus obtained were added 60 ml of ethyl acetate and 60 ml of water. The mixture was adjusted to pH 10.5 with potassium carbonate. The organic layer was separated. The aqueous layer was extracted with 30 ml of ethyl acetate. The extract was combined with the previously separated organic layer. The combined organic-layer was washed with water and a saturated aqueous sodium chloride solution in this order, and dried over anhydrous magnesium sulfate. The solvent was removed by distillation under reduced pressure. The residue thus obtained was added 1.5 ml of a 5N dry hydrogen chloride-ethanol solution. The resulting mixture was stirred at room temperature for 1 hour. The resulting crystals were collected by filtration and dried to obtain 2.6 g of 1-acetoxy-1-(6-benzyloxy-2-naphthyl)-2-[2-(N,N-dimethylamino)ethoxy]ethane hydrochloride (compound No. 286).

Quelle