Novel Mononuclear Metal-Phosphinite Compounds and Catalytic Performance in Transfer Hydrogenation of Ketones

Abstract

Since the obtained chiral alcohols are rather useful as well as biologically active compounds, reduction of ketones to their respective alcohols is a crucial topic in synthetic chemistry. Thus, a new phosphinite ligand was synthesized by the interaction of cationic species N-vinyl imidazolium (1) with PCy2Cl. This phosphinite ligand in combination with [Ru(η6-p-cymene)(µ-Cl)Cl]2 and Ir(η5-C5Me5)(μ-Cl)Cl]2 gave active catalytic systems for transfer hydrogenation reaction. Under optimum circumstances, ruthenium complex (3) showed rather high conversion reduction reaction of acetophenone. Reversibility of the transfer hydrogenation reaction was found to be low under these reaction circumstances.

Half‐sandwich ruthenium(II) and iridium(III) complexes of imidazole based phosphinite ligands: antioxidant and antibacterial activities as well as electrochemical properties

“…Synthesis and characterization of ionic liquids (IL 1, IL 2) , phosphinite ligands (IL 1 -OPPh 2, IL 2 -OPPh 2 ), and their complexes (1-6) has been reported previously (Scheme 1) [36,37] and given as supporting information (SI). Complexes 1-6 were obtained in yields of 93.2, 91.1, 90.0, 95.9, 94.4, and 89.1 % as solid.…”

“…Compounds 1-6 were synthesized and characterized according to our previous study [36,37] and given as Supporting Information.…”