Aromatic ammo compounds containing carboxyl,carbethoxyl,cyano,different groups were prepared from the corresponding nitro compounds sulfamido and other by means of reduction with iron filings in the presence of ammonium chloride.yields were generally over 80%.During the reduction of the aromatic nitro compounds possessing different functional groups,there obtained iron sludges of different compositions,colours and degrees of fineness.The sludges from the easily reduced nitro compounds contained less ferrous oxide than those from the difficultly reduced ones.