In a further example amine (???CH2NH2) group may be obtained by reduction of nitrites (???CN), for example by catalytic hydrogenation using for example hydrogen in the presence of a metal catalyst, for example palladium on a support such as carbon, or Raney??? nickel, in a solvent such as an ether e.g. tetrahydrofuran or an alcohol e.g. methanol or ethanol at a temperature from ambient to the refl