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    Ferrocene based chiral binuclear η6-benzene-Ru(II)-phosphinite complexes: Synthesis, characterization and catalytic activity in asymmetric reduction of ketones
    (Wiley, 2018) Al-bayati, Yaser W. Abdlhmed; Karakaş, Duygu Elma; Meriç, Nermin; Aydemir, Murat; Durap, Feyyaz; Baysal, Akın; 0000-0001-7294-6792; 0000-0003-0899-1948; 0000-0003-2582-9993
    In the present study, a series of chiral C-2-symmetric ferrocenyl based binuclear (6)-benzene-Ru(II) complexes bearing diphenylphosphinite and diisopropylphosphinite moieties have been synthesised. The new binuclear (6)-benzene-Ru(II)-phosphinite complexes were characterised based on nuclear magnetic resonance (H-1, C-13, P-31-NMR), FT-IR spectroscopy and elemental analysis. Then, these complexes have been screened as catalytic precursors in the transfer hydrogenation of acetophenone with 2-propanol as both the hydrogen source and solvent in the presence of KOH. The corresponding optically active secondary alcohols were obtained in excellent conversion rates between 96 and 99% and moderate to good enantioselectivities (up to 78% ee). The complex 5 was the most efficient catalyst among the four new complexes investigated herein.