Transfer hydrogenation of ketones in the presence of half sandwich ruthenium (II) complexes bearing imidazoline and benzimidazole ligand

Abstract

This article explores the possibility of using imidazoline and benzimidazole derivatives as interesting ligands due to the fact that they are structurally simple, readily available, inexpensive, and they allow easy introduction of various substituents into their structure. Therefore, Nsubstituted imidazoline and benzimidazole ligands and their new ruthenium complexes [RuCl 2 (η 6 -p-cymene)(L)] (L = N-substituted imidazoline/benzimidazole) were synthesized and characterized. The catalytic performances of new complexes are investigated for the transfer hydrogenation of ketones. Furthermore, corresponding secondary alcohols were also obtained in good yields.

Synthesis, in vitro anticancer activities, and quantum chemical investigations on 1,3-bis-(2-methyl-2-propenyl)benzimidazolium chloride and its Ag(I) complex

“…Recently, the use of N-heterocyclic carbenes in coordination chemistry has attracted considerable attention due to their large steric demand and excellent electronic properties, namely, high σ-basicity and low π-acidity, [4][5][6][7][8] which foster increased activity in catalytic systems. [9][10][11][12][13][14][15][16] Benzimidazole-based N-heterocyclic carbenes are stable systems and are the subject of significant interest because of pharmacological activities such as antitumor, 17 antibacterial, 18 and antifungal. 19 Most NHCs are prepared by deprotonation of azolium precursors with a simple metal salt or a strong base.…”