Reaktion #1049634

Reaktionsgleichung

Acetic anhydride

4-aminomethyl-1-(2-phenoxyethyl)piperidine

→

N-[1-(2-phenoxyethyl)piperid-4-ylmethyl]acetamide

Lösungsmittel

pyridine

Reaktionsbedingungen

Aufarbeitung

1. 1
   Temperaturwith cooling
2. 2
   Sonstigeevaporated to dryness
3. 3
   SonstigeWater was removed
4. 4
   workup.ADDITIONby adding toluene
5. 5
   Sonstigeremoving the toluene
6. 6
   workup.DISTILLATIONby distillation
7. 7
   workup.DISSOLUTIONThe residue was dissolved in water (100 ml)
8. 8
   WaschenThe solution was washed with dichloromethane
9. 9
   Extraktionextracted with dichloromethane

Vorschrift

Acetic anhydride (8.72 g) was added with stirring to a mixture of 4-aminomethyl-1-(2-phenoxyethyl)piperidine (20.0 g) in pyridine (85 ml) containing 4-dimethylaminopyridine (catalytic amount) with cooling to maintain ambient temperature. The mixture was stirred overnight at ambient temperature and then evaporated to dryness. Water was removed by adding toluene and removing the toluene by distillation. The residue was dissolved in water (100 ml) and 2M hydrochloric acid (50 ml). The solution was washed with dichloromethane, basified with concentrated sodium hydroxide solution and extracted with dichloromethane to give N-[1-(2-phenoxyethyl)piperid-4-ylmethyl]acetamide as an oil which solidified on standing, m.p. 79°-80° C.

Quelle