Abstract
Ru-MCM-41 catalysts were prepared by deposition of several complexes from their solvents: of Ru acetylacetonate from its ether solution, of cis-dichlorobis(2,2′-bipyridine) Ru in chloroform, of di-μchlorobis((p-cymene)chloro Ru(II)) in chloroform and of dichloro(1,5-cyclooctadiene) Ru(II) dissolved in pyridine. The catalysts were characterized as prepared and after several reactions cycles by: adsorption–desorption isotherms of N2 at 77 K, XRD, FTIR, and XPS. The above catalysts were used in the liquid phase hydrogenation of a F prostaglandin intermediate. A strong leaching of Ru was observed, but after four cycles the catalysts remained unchanged in activity and diastereoselectivity. The stereoselectivity was found to be influenced by the nature of the precursor complex. In the presence of the catalyst prepared from di-μchlorobis((p-cymene)chloro Ru(II)) the natural-like product was obtained.
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