Reduction of Nitro Compounds into Amines

The reductive alkylation of aromatic nitro compounds using H2+Pd/C in the presence of 40% aqueous formaldehyde gives directly dimethylamino derivatives in good yield (Eq. 6.43).83 

Electrochemically generated nickel is very selective for the reduction of aromatic nitro compounds into anilines, in which alkenyl, alkynyl, halo, cyano, formyl, and benzyloxy groups are not affected.84 Sodium sulfide has been used for the selective reduction of aromatic nitro group in the presence of aliphatic nitro groups (Eq. 6.44).85 

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