Novel dinuclear μ-carboxylatoruthenium complexes for the low pressure hydroformylation of terminal alkenes

From Olefins to Alcohols: Efficient and Regioselective Ruthenium‐Catalyzed Domino Hydroformylation/Reduction Sequence

“…First, the effect of water was studied in more detail 9a,c. 13, 16 In the absence of water the yield of the oxo products as well as the n / i ratio decreased (Table 2, entry 2). However, when the reaction in the absence of water was carried out with an increased partial pressure of H 2 (CO/H 2 1:2), the yield of the alcohol improved (Table 2, entry 8).…”

“…Water was employed as an additive because Kalck et al. showed that it facilitates the production of a catalytically active ruthenium hydride species from carboxylato ruthenium complexes 13. To suppress unwanted hydrogenation of the alkene, we added 0.25 equivalents of LiCl to the reaction mixtures 14…”

Isomerization–Hydroformylation Tandem Reactions

“…Organic ligands tested were aromatic amines (2,2′-bipyridine, 2,2′-bipyrimidine, 1,10′-phenanthroline) and saturated cyclic amines and aliphatic amines (Et 3 N) or simple amides, such as N , N -dimethylacetamide . Kalck and co-workers investigated dinuclear ruthenium complexes modified with NEt 3 or PPh 3 for the hydroformylation . Replacement of the latter by P­(OPh) 3 diminished the rate of hydrogenation as well as the isomerization disposition.…”

Dinuclear ruthenium(I) complexes of the type [Ru2(CO)4L2] with carboxylate or 2-pyridonate ligands: Evaluation as catalysts for olefin cyclopropanation with diazoacetates

“…(2)). It has been reported [18] that 1d is obtained as a ''white polymer'' from the reaction of Ru 3 (CO) 12 with excess trifluoroacetic acid in toluene at 90°C. This product was characterized by IR spectroscopy only and was directly converted into the bis(triphenylphosphane) adduct 2d (L = PPh 3 ).…”