Heteroleptic ruthenium(II) complexes of 2-(2-pyridyl)benzimidazoles: A study of catalytic efficiency towards transfer hydrogenation of acetophenone

The Golden Age of Transfer Hydrogenation

“…Not surprisingly, TH involving ruthenium complexes with bi- or polydentate backbones received ever-increasing attention in the past few years. − Numerous variations and modifications of conventional polydentate ligands including PNNP, − NNN, − CNN, − and NNO types, NNP chelating fragments, and PPPC have been extensively investigated with the aim to explore more efficient ruthenium catalysts. Moreover, the tolerance of these conventional ruthenium catalysts to substrate variations, especially for the functional unsaturated compounds, has been investigated with polydentate ligands.…”

Half‐sandwich ruthenium‐based versatile catalyst for both alcohol oxidation and catalytic hydrogenation of carbonyl compounds in aqueous media

“…[20] In search for late transition metal complexes with high catalytic activity and novel structures, we are interested in the construction of half-sandwich complexes based on the ligands with N-donor because the electronic and steric effects around the metal center can be easily altered. [21] Several cyclometallated half-sandwich group 9 complexes have been prepared which exhibit good catalytic activity for olefin polymerization and imine reduction in our previous work. [22] As an ongoing project, four kinds of mononuclear half-sandwich ruthenium complexes was prepared based on benzothiazole ligands.…”

Chemistry and Catalytic Performance of Pyridyl‐Benzimidazole Oxidomolybdenum(VI) Compounds in (Bio)Olefin Epoxidation

“…[34] The N,N′-diimine chelating ligand pbim has a rich history in coordination chemistry, and metal complexes containing this ligand have been used to catalyze various organic reactions. [35][36][37][38][39] An appealing feature of pbim is that facile alkylation of the bim NH group allows a wide variety of substituents to be attached, which is of interest in the context of catalyst optimization. With respect to the epoxidation of olefins, the published studies include the use of [CH 3 ReO 3 (pbim)] as a catalyst, with aq.…”

“…On the other hand, several complexes bearing bidentate 2‐substituted benzimidazole derivatives have been described; for example, [MoO 2 (L) 2 ], where LH = 2‐(α‐hydroxyalkyl)benzimidazole, and [MoO(O 2 ) 2 L], where L = 2‐(2‐pyridyl)‐benzimidazole (pbim) . The N , N′ ‐diimine chelating ligand pbim has a rich history in coordination chemistry, and metal complexes containing this ligand have been used to catalyze various organic reactions . An appealing feature of pbim is that facile alkylation of the bim NH group allows a wide variety of substituents to be attached, which is of interest in the context of catalyst optimization.…”