Abstract
Binuclear rhodium(I) complexes 1 and 2 based on a pyridylalkylamine ligands have been synthesized. The molecular structure of complex 1 were determined by the single-crystal X-ray diffraction technique. Complex 1 has been explored for the asymmetric hydrogenation of various aromatic ketones, using H2 as a source of hydrogen. The results showed that the corresponding chiral alcohols could be obtained with high activity (up to 99% yield) and excellent enantioselectivities (up to 96% ee) at 20 °C and 20 bar H2 pressure. Propiophenone a preferred substrate to catalytic activity and enantioselectivity in the presence of a base and their selectivity was improved by the presence acetone in the catalytic reaction.
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