A protocol for the chemoselective hydrogenation of nitro compounds to the corresponding anilines by means of supported gold catalysts is described. Nitro groups on different compounds — containing double bonds, carbonyl, nitrile or amide groups — have been successfully hydrogenated on supported gold nanoparticles (Au/TiO₂ and Au/Fe₂O₃), using a batch reactor under H₂ pressure. Unlike other noble metals, gold shows high chemoselectivity towards reduction of the nitro group, at near-complete conversion of the substrate. The total time to carry out this protocol strongly depends on the reaction step, which is a function of the activity of the catalyst and the nature of the substrate.