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

✍ Scribed by Michelangelo Gruttadauria; Leonarda F Liotta; Renato Noto; Giulio Deganello

Publisher: Elsevier Science
Year: 2001
Tongue: French
Weight: 62 KB
Volume: 42
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(01)00065-x

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✦ Synopsis

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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