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Ruthenium carbonyl complexes supported by pyridine-alkoxide ligands: synthesis, structure and catalytic oxidation of secondary alcohols

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Abstract

Five novel trinuclear ruthenium complexes [[PyCH[double bond, length as m-dash]C(RC6H4)O]2Ru3(CO)8] [R = 4-OMe (6), 4-Br (7), 4-CF3 (8)] and [[PyCH2CH(RC6H4)O]2Ru3(CO)8] [R = 2-Br (9), 2-CF3 (10)], were synthesized by treating Ru3(CO)12 with two equivalents of the corresponding pyridine-alcohols PyCH2CH(RC6H4)OH [1–5, R = 4-OMe, 4-Br, 4-CF3, 2-Br and 2-CF3] in refluxing toluene. The structures of 6–10 were fully characterized by IR and NMR spectroscopy, elemental analysis and single-crystal X-ray diffraction. They were found to be efficient catalysts for the oxidation of secondary alcohols by NMO, giving the corresponding ketones in good to excellent yields within 15 min, of which [PyCH[double bond, length as m-dash]C(4-OCH3C6H4)O]2Ru3(CO)8 (6) is the best.

Graphical abstract: Ruthenium carbonyl complexes supported by pyridine-alkoxide ligands: synthesis, structure and catalytic oxidation of secondary alcohols

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Publication details

The article was received on 21 Jun 2019, accepted on 11 Aug 2019 and first published on 12 Aug 2019


Article type: Paper
DOI: 10.1039/C9NJ03222C
New J. Chem., 2019, Advance Article

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    Ruthenium carbonyl complexes supported by pyridine-alkoxide ligands: synthesis, structure and catalytic oxidation of secondary alcohols

    S. Zong, K. Liu, X. Yue, Z. Hao, Z. Ma, Z. Han, G. Lu and J. Lin, New J. Chem., 2019, Advance Article , DOI: 10.1039/C9NJ03222C

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