In the presence of a simple combined catalyst of a tungstate monomer (TBA2WO4, TBA: tetra-n-butylammonium) and rhodium acetate (Rh2(OAc)4), hydrosilylation of various types of substances including ketone, aldehyde, carbon dioxide, alkene, nitrile, and furan derivatives efficiently proceeded, affording the corresponding hydrosilylation products in moderate to high yields (≥63% yields). In addition, the present system was also applicable to the one-pot reduction of benzamide to benzylamine (95% yield).
Solventless Silane Alcoholysis Catalyzed by Recoverable Dirhodium(II) Perfluorocarboxylates
作者:Andrea Biffis、Mirko Braga、Marino Basato
DOI:10.1002/adsc.200303247
日期:2004.3
heterogenization of these catalysts has been accomplished through a novel strategy based on fluorous chemistry. Indeed, perfluorinated catalysts of this kind are easily adsorbed on silica which has been previously functionalized at its surface with perfluoroalkyl chains. Use of such supported catalysts (bonded fluorousphase catalysts) allows an easy and almost complete catalyst separation and recycling with
Fluoride ion-catalyzed reduction of aldehydes and ketones with hydrosilanes. Synthetic and mechanistic aspects and an application to the threo-directed reduction of .alpha.-substituted alkanones
作者:Makoto Fujita、Tamejiro Hiyama
DOI:10.1021/jo00258a003
日期:1988.11
Rate Enhancement with a Bowl-Shaped Phosphane in the Rhodium-Catalyzed Hydrosilylation of Ketones