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Synthesis and Structures of Ruthenium Carbonyl Complexes Bearing Pyridine-Alkoxide Ligands and Their Catalytic Activity in Alcohol Oxidation.

ABSTRACT: Reaction of Ru3(CO)12 with two equiv of 6-bromopyridine alcohols 6-bromopyCHROH [(R = C6H5 (L1); R = 4-CH3C6H4 (L2); R = 4-OMeC6H4 (L3); R = 4-ClC6H4 (L4); (R = 4-CF3C6H4 (L5); R = 2-OMeC6H4 (L6); R = 2-CF3C6H4 (L7)] and 6-bromopyC(Me)2OH (L8) in refluxing xylene afforded novel trinuclear ruthenium complexes [6-bromopyCHRO]2Ru3(CO)8 (1a-1g) and [6-bromopyC(Me)2O]2Ru3(CO)8 (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.

SUBMITTER: Yan X 

PROVIDER: S-EPMC6558070 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature

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Synthesis and Structures of Ruthenium Carbonyl Complexes Bearing Pyridine-Alkoxide Ligands and Their Catalytic Activity in Alcohol Oxidation.

Yan Xinlong X   Yue Xiaohui X   Liu Kang K   Hao Zhiqiang Z   Han Zhangang Z   Lin Jin J  

Frontiers in chemistry 20190604

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> (<b>L1</b>); R = 4-CH<sub>3</sub>C<sub>6</sub>H<sub>4</sub> (<b>L2</b>); R = 4-OMeC<sub>6</sub>H<sub>4</sub> (<b>L3</b>); R = 4-ClC<sub>6</sub>H<sub>4</sub> (<b>L4</b>); (R = 4-CF<sub>3</sub>C<sub>6</sub>H<sub>4</sub> (<b>L5</b>); R = 2-OMeC<sub>6</sub>H<sub>4</sub> (<b>L6</b>); R = 2-CF<sub>3</sub>C<sub>6</sub>H<sub>4</sub> (<b>L7</b>)] and 6-bromopyC(Me)<sub>2<  ...[more]

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