Osmium-catalyzed reduction processes

Catalytic reduction processes are of vital importance in organic chemistry. Numerous reactions catalyzed by palladium, rhodium, ruthenium, iridium and platinum complexes have been developed. Meanwhile, the use of osmium compounds as catalysts for reduction reactions has received surprisingly little attention, although they can effectively accelerate some processes. In some cases, osmium catalysts are superior to related ruthenium compounds both in activity of the catalytic system and in stability of the catalyst per se. This review systematically summarizes reductive transformations catalyzed by organometallic osmium complexes. General trends in this research area followed in the literature are described and prospects in this field of chemistry are discussed. The hydrogen transfer and borrowing hydrogen reactions, hydrogenation, hydroformylation, reductive amination, and water-gas shift reactions are considered. The bibliography includes 96 references.

Automated summary

This review summarizes reductive transformations catalyzed by organometallic osmium complexes. Osmium catalysts are found to have superior activity and stability compared to related ruthenium compounds. The trends in this research area are described in the literature and prospects in this field are discussed.