Reduction of CX to CHXH by Catalytic Hydrogenation

This chapter deals with heterogeneous and homogeneous catalytic hydrogenation of the CX bond, mainly compounds containing carbon–oxygen and carbon–nitrogen double bonds.1–8 Various catalysts are employed for the hydrogenation reaction, the most widely used for heterogeneous catalytic hydrogenation being based on Fe, Ni, Co, Ru, Rh, Pd, Os, Ir and Pt, with the most popular catalysts based on Pt, Pd and Ni. The so-called copper chromite has also been used for hydrogenation of CX double bonds.