Chlorocarbonyl ruthenium(II) complexes of tripodal triphos {MeC(CH2PPh2)3}: Synthesis, characterization and catalytic applications in transfer hydrogenation of carbonyl compounds

Synthesis, structural characterization and catalytic transfer hydrogenation of ruthenium(II) carbonyl complexes bearing N,N,O pincer type benzoylhydrazone ligands

“…In terms of the TON/TOF, the catalytic efficiency of the new ruthenium(II) complexes is higher than that of other ruthenium(II) complexes [23,24,26,27,45].…”

“…Among the various metal complexes employed for transfer hydrogenation reactions, ruthenium complexes have a long pedigree as catalysts for homogeneous transfer hydrogenation reactions [15,16]. Ruthenium complexes containing cyclometallated and N-heterocyclic carbene ligands [17,18], pincer ligands [19,20], Schiff base ligands [3,21,22], tripodal ligands [23,24], arene ligands [25,26] and phosphine-or amine-based ligands [27,28] Triphenylphosphine, 2-acetylpyridine, benzoylhydrazide derivatives and the ketones used for the catalysis were obtained from Sigma-Aldrich and were used without further purification.…”

Synthesis of an Ionic Paramagnetic Ruthenium(III) Complex and Its Application as an Efficient and Recyclable Catalyst for the Transfer Hydrogenation of Ketones

“…[2][3][4] Transfer hydrogenation is a particularly useful protocol in which unsaturated compounds can be hydrogenated without the use of molecular H 2 . [6][7][8] Ruthenium(II) complexes bearing N-heterocyclic carbenes (NHCs), phosphanes, diamines, aminodiphosphanes, [a] Shanghai Key Laboratory of Green Chemistry and Chemical paired electron in the phosphane-ligated low-spin Ru III complex. [5] Transition-metal complexes have been extensively investigated as catalysts for the transfer hydrogenation of ketones to secondary alcohols.…”

“…amine-bis(phenolate)s, chiral ligands, and heterocyclic ligands [5][6][7][8][9][10][11][12][13][14][15][16] are the most prominent catalysts and exhibit high activities in the transfer hydrogenation of ketones. In contrast to electron-rich ligands as strong σ-donors, [17] electron-deficient ligands are less explored.…”

“…In comparison with hydrogenation by H 2 or with a hydride reagent, transfer hydrogenation is attractive due to its operational simplicity and the reduction of risk associated with the use of high pressure, which are beneficial for large‐scale production from environmental and economic points of view 5. Transition‐metal complexes have been extensively investigated as catalysts for the transfer hydrogenation of ketones to secondary alcohols 6–85–16 are the most prominent catalysts and exhibit high activities in the transfer hydrogenation of ketones.…”