Selective hydrogenation of benzylideneacetone (PhCH=CHCOMe) catalysed by iridiumphosphine systems prepared in situ is reported. Depending on the steric properties of the phosphine employed and the P:lr ratio, different species are formed in solution, as evidenced by n.m.r. spectroscopy. [IrH5(PR3)2] (R = alkyl or aryl) is a catalyst for the hydrogenation of the carbon-carbon double bond, whereas [IrH3(PR3)3] catalyses the reduction of the carbonyl group with a selectivity up to 100%.
Selective hydrogenation of PhCH=CHCOMe to the unsaturated alcohol catalysed by [IrH3(PR3)3] (R = alkyl or aryl)
Farnetti E.
;Kaspar J.;
1988-01-01
Abstract
Selective hydrogenation of benzylideneacetone (PhCH=CHCOMe) catalysed by iridiumphosphine systems prepared in situ is reported. Depending on the steric properties of the phosphine employed and the P:lr ratio, different species are formed in solution, as evidenced by n.m.r. spectroscopy. [IrH5(PR3)2] (R = alkyl or aryl) is a catalyst for the hydrogenation of the carbon-carbon double bond, whereas [IrH3(PR3)3] catalyses the reduction of the carbonyl group with a selectivity up to 100%.File in questo prodotto:
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