Hydrogenation of alkynes with a palladium anchored polystyrene catalyst |
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Authors: | Norman L. Holy Steven R. Shelton |
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Affiliation: | Department of Chemistry, Western Kentucky University, Bowling Green,KY 42101,U.S.A. |
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Abstract: | 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 (10mmol) with 0.017 g-atom (based on Pd) of catalyst at room temperature and 30 psig for 7.3 h resulted in 82 % styrene and 14% ethylbenzene. Methylphenylacetylene was converted to cis-1-phenylpropene (60%) and n-propylbenzene (17 %). 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. |
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