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0 °C

1-(2-Fluoro-4-nitro-phenyl)-4-methyl-1H-imidazole (4.66 g, 21.1 mmol) was dissolved in a mixture of methanol (25 mL) and tetrahydrofuran (100 mL). The solution was cooled to 0° C. under an atmosphere of nitrogen. Ammonium formate (6.64 g, 105 mmol) and 10% palladium on charcoal (0.24 g) was added and the mixture was stirred at 20° C. for 18 h. The mixture was filtered through celite and the celite was washed with methanol. The filtrate was evaporated under reduced pressure and the residue was partitioned between ethyl acetate and 10% aqueous sodium bicarbonate solution. The organic layer was separated, washed with brine, dried over sodium sulfate and evaporated under reduced pressure to yield the title compound (3.89 g, 97%) as a yellow solid.

1. filtrationThe mixture was filtered through celite
2. washthe celite was washed with methanol
3. customThe filtrate was evaporated under reduced pressure
4. customthe residue was partitioned between ethyl acetate and 10% aqueous sodium bicarbonate solution
5. customThe organic layer was separated
6. washwashed with brine
7. dry with materialdried over sodium sulfate
8. customevaporated under reduced pressure