Tetrahedron Letters

Palladium on pumice: new catalysts for the stereoselective semihydrogenation of alkynes to (Z)-alkenes

M Gruttadauria, LF Liotta, R Noto, G Deganello

文献索引：Gruttadauria, Michelangelo; Liotta, Leonarda F.; Noto, Renato; Deganello, Giulio Tetrahedron Letters, 2001 , vol. 42, # 10 p. 2015 - 2017

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被引用次数: 20

摘要

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.