Five imidazolium-based materials have been synthesised and used for the first time as palladium scavengers. Radical reactions of suitable bis-vinylimidazolium salts led to a series of insoluble materials through homo-polymerisation, immobilisationwith a 3-mercaptopropyl-modified silica gel or co-polymerisation with ethylene glycol dimethylacrylate. These materialswere screened as palladium scavengers with a set of palladium(0) and palladium(II) compounds in different solvents and at different starting amounts of palladium. In many cases, residual amounts of palladium were lower than 5 ppm, as requested for the manufacture of active pharmaceutical ingredients and fine chemicals. The application of one of these materialsas a palladium scavenger in a Suzuki coupling reaction resulted in a 29-fold abatement of the palladium content in the final product with respect to the control reaction.
|Numero di pagine||6|
|Stato di pubblicazione||Published - 2014|
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