Ammonium Chloride → 4-Chloro-5-iodobenzene-1,2-diamine

Participants

Reaction Conditions

Reaction Steps

To a suspension of 5-chloro-4-iodo-2-nitroaniline 16-1 (36.5 g, 122 mmol) in EtOH (800 mL) and water (150 mL) was added iron powder (38 g, 673 mmol) and NH4Cl (16 g, 306 mmol). The mixture was heated under nitrogen at 50° C. overnight. Additional iron powder (38 g, 673 mmol) and NH4Cl (16 g, 306 mmol) were added and heating was continued for 45 h. The reaction mixture was cooled, filtered and concentrated. The residue was re-dissolved in ethyl acetate and washed with sodium bicarbonate solution. The organic phase was concentrated to afford the desired product 16-2 as a gray solid, which was used in the next step without further purification.

Provenance & Evidence