Yan, Xinlong Yue, Xiaohui Liu, Kang Hao, Zhiqiang Han, Zhangang Lin, Jin Table_1_Synthesis and Structures of Ruthenium Carbonyl Complexes Bearing Pyridine-Alkoxide Ligands and Their Catalytic Activity in Alcohol Oxidation.DOC <p>Reaction of Ru<sub>3</sub>(CO)<sub>12</sub> with two equiv of 6-bromopyridine alcohols 6-bromopyCHROH [(R = C<sub>6</sub>H<sub>5</sub> (L1); R = 4-CH<sub>3</sub>C<sub>6</sub>H<sub>4</sub> (L2); R = 4-OMeC<sub>6</sub>H<sub>4</sub> (L3); R = 4-ClC<sub>6</sub>H<sub>4</sub> (L4); (R = 4-CF<sub>3</sub>C<sub>6</sub>H<sub>4</sub> (L5); R = 2-OMeC<sub>6</sub>H<sub>4</sub> (L6); R = 2-CF<sub>3</sub>C<sub>6</sub>H<sub>4</sub> (L7)] and 6-bromopyC(Me)<sub>2</sub>OH (L8) in refluxing xylene afforded novel trinuclear ruthenium complexes [6-bromopyCHRO]<sub>2</sub>Ru<sub>3</sub>(CO)<sub>8</sub> (1a-1g) and [6-bromopyC(Me)<sub>2</sub>O]<sub>2</sub>Ru<sub>3</sub>(CO)<sub>8</sub> (1h). These complexes were characterized by FT-IR and NMR spectroscopy as well as elemental analysis. The structures of all the complexes were further confirmed by X-ray crystallographic analysis. In the presence of tert-butyl hydroperoxide (TBHP) as the source of oxidant, complexes 1a-1h displayed high catalytic activities for oxidation of primary and secondary alcohols and most of oxidation reactions could be completed within 1 h at room temperature.</p> ruthenium carbonyl complexes;alcohols oxidation;t-butyl hydroperoxide;pyridine alcohols;chemoselectivity 2019-06-04
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10.3389/fchem.2019.00394.s001