Reduction of aromatic nitro groups to amino groups
Description: Nitro groups can be converted into amino groups by treatment with a reducing agent such as palladium on carbon with hydrogen gas (Pd/C, H2), zinc metal with acid, or tin (Sn) with acid.
Notes: For our purposes there are no important differences between these reagents; they are all effective.
Mechanism: For the purposes of Org 1 / Org 2 the mechanism of these reactions is not that important.
For more information consult “March’s Advanced Organic Chemistry” by March and Smith for more detailed discussion of these reactions.