Réaction #809295

Équation de réaction

Fluoronitrobenzene

triethylamine

Ethyl acetate

2-methyl-piperazine

→

aniline

2-(3-Methylpiperazin-1-yl)phenylamine

Solvants

DMF

Conditions de réaction

Traitement

1. 1
   Températureto cool to room temperature before the solvent
2. 2
   Extractionthe product was extracted with diethyether (2×200 mL)
3. 3
   Extractionextracted with ethyl acetate (2×200 mL)
4. 4
   Lavagewashed with saturated brine
5. 5
   Séchagedried over magnesium sulfate
6. 6
   Filtrationfiltered
7. 7
   Concentrationthe filtrate was concentrated in vacuo
8. 8
   workup.DISSOLUTIONThe product (10.5 g) was dissolved in ethanol (250 mL)
9. 9
   workup.ADDITIONPalladium on charcoal catalyst (10% w/w, 2.2 g) was added to the solution
10. 10
    FiltrationThe solution was filtered
11. 11
    Autrethe solvents evaporated in vacuo

Mode opératoire

Fluoronitrobenzene (7.1 g, 50 mmol) was dissolved in DMF (100 mL) containing triethylamine (10 g, 100 mmol) and placed under a nitrogen atmosphere. To the solution was added 2-methyl-piperazine (5.5 g, 55 mmol). The reaction was heated to 80° C. for 16 hours. The reaction was allowed to cool to room temperature before the solvent was reduced to half volume in vacuo. Ethyl acetate (200 mL) and ice-water (250 mL) were added to the solution and the product was extracted with diethyether (2×200 mL). The aqueous phase was saturated with sodium chloride and extracted with ethyl acetate (2×200 mL). The organic phases were combined, washed with saturated brine, dried over magnesium sulfate, filtered and the filtrate was concentrated in vacuo. The product (10.5 g) was dissolved in ethanol (250 mL). Palladium on charcoal catalyst (10% w/w, 2.2 g) was added to the solution and the solution was hydrogenated in a Parr apparatus at 3 bar for 3 hours. The solution was filtered and the solvents evaporated in vacuo to give the aniline product. Yield (8.0 g, 83%)

Source