Palladium on pumice: new catalysts for the stereoselective semihydrogenation of alkynes to (Z)-alkenes
M Gruttadauria, LF Liotta, R Noto, G Deganello
Index: Gruttadauria, Michelangelo; Liotta, Leonarda F.; Noto, Renato; Deganello, Giulio Tetrahedron Letters, 2001 , vol. 42, # 10 p. 2015 - 2017
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Citation Number: 20
Abstract
High selectivities (93–99%) and excellent stereoselectivities (> 99%) in the semihydrogenation of C C triple bonds were achieved using palladium on pumice with a metal loading of 0.5, 1.5 or 3.0% wt as catalyst. The reactions were carried out in ethanol or tetrahydrofuran with only 2.5% of ethylenediamine allowing a self-terminating semihydrogenation independently on the C C triple bond.
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