The Hoveyda-Grubbs catalyst has been successfully immobilized on surface-modified magnetic nanoparticles with a loading amount of 0.28 mmol ruthenium/g (magnetic support). The supported catalysts were active for the self-metathesis of methyl oleate and macro-monomer in a quantitative conversion, respectively. In addition, the catalyst can be easily separated by using a magnet and reused several times with sustained activity.
The hydration of terminal olefins to secondary alcohols has been achieved using a Pd(II)/Ru(II) catalyst combination with high regioselectivity and yields. Both vinyl arenes and aliphatic olefins can be hydrated easily with the tandem catalyst system using a low catalyst loading of 1 mol%.
Formal Hydration of Non-activated Terminal Olefins Using Tandem Catalysts. -A tandem Pd(II)/Ru(II) catalyst system allows for the highly regioselective hydration of a broad range of olefins, including substituted styrenes and aliphatic olefins with various functional groups. -(YANG, Y.; GUO, J.; NG, H.; CHEN, Z.; TEO*, P.; Chem. Commun. (Cambridge) 50 (2014) 20, 2608-2611, http://dx.doi.org/10.1039/c3cc48810a ; Dep. Chem., Natl. Univ. Singapore, Singapore 117543, Singapore; Eng.) -R. Staver 25-053
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