6533b85afe1ef96bd12b9fa9

RESEARCH PRODUCT

ChemInform Abstract: Palladium on Pumice: New Catalysts for the Stereoselective Semihydrogenation of Alkynes to (Z)-Alkenes.

Renato NotoLeonarda F. LiottaMichelangelo GruttadauriaGiulio Deganello

subject

Ethanolchemistry.chemical_elementEthylenediamineGeneral MedicineTriple bondCatalysischemistry.chemical_compoundchemistryPumicePolymer chemistryOrganic chemistryStereoselectivityTetrahydrofuranPalladium

description

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.

https://doi.org/10.1002/chin.200124063