Réaction #8252

Équation de réaction

3-Fluoro-4-(4-methylimidazol-1-yl)nitrobenzene

ammonium formate

→

title compound

Rendement 90.5%

5-Amino-2-(4-methylimidazol-1-yl)fluorobenzene

Rendement 90.5%

Solvants

methanol

tetrahydrofuran

Conditions de réaction

Traitement

1. 1
   Températurecooled to 0° under nitrogen
2. 2
   Filtrationfiltered through celite, celite
3. 3
   Lavagewashed with methanol (200 ml), and filtrate
4. 4
   Autreevaporated to dryness
5. 5
   AutreThe residue was partitioned between ethyl acetate (800 ml) and 10% aqueous sodium bicarbonate (250 ml)
6. 6
   AutreThe organic layer was separated
7. 7
   Lavagewashed with brine (250 ml)
8. 8
   Séchagedried (magnesium sulfate)
9. 9
   Autreevaporated

Mode opératoire

3-Fluoro-4-(4-methylimidazol-1-yl)nitrobenzene (64.7 g, 0.293 M) was dissolved in a mixture of methanol (200 ml) and tetrahydrofuran (800 ml), cooled to 0° under nitrogen, and treated with ammonium formate (99.3 g, 1.46 M) followed by palladium on charcoal (10%, 2.5 g). The mixture was stirred at ambient temperature for 48 hours, filtered through celite, celite washed with methanol (200 ml), and filtrate evaporated to dryness. The residue was partitioned between ethyl acetate (800 ml) and 10% aqueous sodium bicarbonate (250 ml). The organic layer was separated, washed with brine (250 ml), dried (magnesium sulfate) and evaporated to give title compound (50.6 g).

Source