HYDROGENATION OF ALKYNES WITH A PALLADIUM ANCHORED POLYSTYRENE CATALYST

Article abstract of DOI:10.1016/S0040-4020(01)97709-9

Treating chloromethylated polystyrene beads with anthranilic acid and then palladium chloride gives a material capable of catalyzing the cis-hydrogenation of alkynes.Hydrogenation of phenylacetylene (10 mmol) with 0.017 g-atom (based on Pd) of catalyst at room temperature and 30 psig for 7.3 h resulted in 82percent styrene and 14percent ethylbenzene.Methylphenylacetylene was converted to cis-1-phenylpropene (60percent) and n-propylbenzene (17percent).Several other alkynes were also converted to cis alkenes.The catalyst is less selective than the Lindlar catalyst, but is air stable and stores well.