Hydrochloric Acid → 4-Amino-2,6-dichloropyridine

Participants

Reaction Conditions

Reaction Steps

To a solution of 2,6-dichloro-4-nitropyridine (14.82 g, 76.79 mmol) in 350 mL ethanol were sequentially added iron powder (19.91 g, 356.58 mmol), water (65.8 mL, 3.6 mol) and concentrated hydrochloric acid (14.1 mL, 464.1 mmol). After the reaction was performed by stirring for 16 h at 95° C., the reaction solution was cooled to room temperature, adjusted to neutral pH, and subjected to suction filtration. After the filtrate was concentrated, it was extracted with ethyl acetate. The organic phase was combined, dried with anhydrous MgSO4, and subjected to rotary evaporation to afford 11.9 g titled product with a yield of 95.1%.

Provenance & Evidence