Studies in surface science and catalysis vol:154 issue:Part A-C pages:2696-2702
Ru-BEA catalysts with 1.0-5.0 wt. % Ru were prepared by ion exchange. The acid properties of these catalysts were investigated using deuterated acetonitrile (CD3CN), pyridine (Py), and 2,6-di-tert-butyl-pyridine (DTBPy); the deposited Ru was studied by CO-FT-IR spectroscopy. The materials were tested as catalysts in the diastereoselective hydrogenation of a prostaglandin intermediate enone. Relations were sought between activity and chemoselectivity to allylic alcohol, and the physical properties of the catalyst. Only for the catalyst with the lowest Ru content (1%), significant chemoselectivity for the allylic alcohol was obtained (12%), with a high degree of diastereoselectivity (> 60%). It is suggested that the acidity plays an important role in promoting the C=O over the C=C hydrogenation.
RECENT ADVANCES IN THE SCIENCE AND TECHNOLOGY OF ZEOLITES AND RELATED MATERIALS, PTS A - C