Réaction #46803

Équation de réaction

4-(4-Nitro-phenyl)-morpholine

potassium permanganate

Na2SO3

→

4-(4-Nitro-phenyl)-morpholin-3-one

Solvants

DCM

water

Conditions de réaction

Traitement

1. 1
   Températurewas heated
2. 2
   Températureto reflux for 10 h
3. 3
   FiltrationThe mixture was filtered trough a pad of celite
4. 4
   Concentrationthe filtrate was concentrated under reduced pressure
5. 5
   workup.STIRRINGThe yellow solid was stirred with 250 mL water
6. 6
   Filtrationthe precipitated product was collected by filtration
7. 7
   AutreThis crude product was purified by chromatography on silica gel eluting with a gradient of DCM/MeOH 100%->50%
8. 8
   workup.ADDITIONThe fractions containing the product
9. 9
   Autrethe solvent evaporated under reduced pressure

Mode opératoire

To a solution of 10 g 4-(4-Nitro-phenyl)-morpholine in 200 mL DCM, 32 g Benzyl-triethyl-ammonium chloride and 22.7 g potassium permanganate (325 mesh) were cautiously added at RT. After stirring for 1 h at RT the reaction mixture was heated to reflux for 10 h. Then a solution of 95 g Na2SO3 in 450 mL water were added under ice cooling and vigourous stirring. The mixture was filtered trough a pad of celite and the filtrate was concentrated under reduced pressure. The yellow solid was stirred with 250 mL water and the precipitated product was collected by filtration. This crude product was purified by chromatography on silica gel eluting with a gradient of DCM/MeOH 100%->50%. The fractions containing the product were combined and the solvent evaporated under reduced pressure. Yield: 2.6 g.

Source