Abstract
Deprotonolysis of the N,O-bidentate pyridyl functionalized alkoxy ligands, 1,1-dimethyl-2-(pyridin-2-yl)ethanol (L 1 H), 1-phenyl-2-(pyridin-2-yl)ethanol (L 2 H) and 1,1-diphenyl-2-(pyridin-2-yl)ethanol (L 3 H), with 1 equiv of AlMe3 gave the corresponding dimeric metal-monoalkyl compounds [L 1 AlMe2]2 (1), [L 2 AlMe2]2 (2), and [L 3 AlMe2]2 (3), respectively. Compounds 1–3 were characterized by 1H and 13C NMR spectroscopy analysis, and the molecular structures of 1 and 2 were further confirmed by X-ray diffraction analysis. In the presence of i PrOH, aluminum compounds 1–2 exhibited excellent catalytic activity for the solvent-free Tishchenko reaction under mild conditions. In addition, the catalyst 3 can be easily isolated and recycled three times without a significant decrease in activity.
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