Transfer hydrogenation of unfunctionalised alkenes using N-heterocyclic carbene ruthenium catalyst precursors

Current advances on ruthenium(II) N-heterocyclic carbenes in hydrogenation reactions

“…Even if a relatively high amount of base was applied, only moderate turnovers could be obtained. In spite of the low TOFs, superior results than previously reported for similar catalysts were obtained [132], with better performances than those observed for corresponding iridium and osmium species. However, no selectivity towards the C@C double bond in presence of other functionalities was observed.…”

Homo‐ and Heterobimetallic Complexes Bearing NHC Ligands: Applications in α‐Arylation of Amide, Suzuki–Miyaura Coupling Reactions, and Tandem Catalysis

“…The cyclometalated Ir III and Rh III NHC complexes are well known for the transfer hydrogenation reaction for a wide range of organic substrates . The Pd II PEPPSI type complexes have received immense impact as catalyst for a wide range of organic transformations.…”

Gallium‐Assisted Transfer Hydrogenation of Alkenes

“…Catalytic transfer hydrogenation is a practical synthetic method that avoids the hazardous handling of gaseous molecular hydrogen 1. 2 Whereas various procedures have been developed for the reduction of heterofunctional groups such as ketones and imines,3 catalytic transfer hydrogenation of alkenes has been less often studied 4. The most versatile approaches involve late transition metals such as Ru, Rh, Ir, Pd, and Pt 1.…”

“…[1,2] Whereas various procedures have been developed for the reduction of heterofunctional groups such as ketones and imines, [3] catalytic transfer hydrogenation of alkenes has been less often studied. [4] The most versatile approaches involve late transition metals such as Ru, Rh, Ir, Pd, and Pt. [1] Methods employing catalysts based on abundant 1st row transition metals [5] and organocatalysts [6] have also been developed.…”