Rhodium(I) complexes of β-diketonates and related ligands as hydrosilylation catalysts
作者:William R. Cullen、Eugene B. Wickenheiser
DOI:10.1016/0022-328x(89)87281-x
日期:1989.7
The complexes (OO)Rh(CH2CH2)2 ((OOH) = FcC(O)CH2C(O)CH3, PhC(O)CH2C(O)CH3, 1,2-(CH3CO)(OH)C6H4, 3-benzoyl-(+)-camphor) are catalysts for the hydrosilylation of PhMeCO with Ph2SiH2. The optical yield from the reaction catalyzed by the camphor derivative is too low to measure. Only low optical yields (max 8.7% e.e.) are obtained from the same reaction by using similar in situ catalysts with ligands
Efficient epoxidation of natural terpenic olefins is performed using nickel acetylacetonate, oxygen and a branched aldehyde at ambient temperature. Total conversions are achieved with selectivities up to 90% into epoxide. Under the same conditions other catalytic systems using transition metalacetylacetonates (Mn(acac)n) have been used, some of which also gave satisfactory results.