Palladium-loaded renewable polymer as a green heterogeneous catalyst for cross-coupling reactions ..
Tuesday, January 6, 2015
Posted by: Lee Gomez
Palladium-loaded renewable polymer as a green heterogeneous catalyst for cross-coupling reactions under microwave irradiation
A new palladium catalyst was prepared by immobilising ligand 2, 2′-dipyridylamine on the backbone of an acidic rosin polymer from gum rosin, on to which palladium(II) was bound via coordination. The catalyst at a low loading of 0.2 mol% was found to be highly effective for Suzuki–Miyaura coupling reactions of aryl halides and arylboronic acids under microwave irradiation in the presence of 1 equiv. of Na2CO3, affording excellent yields of the corresponding biaryls. Moreover, the catalyst exhibited very good recyclability over three cycles.
Read More: http://www.ingentaconnect.com/content/stl/jcr/2014/00000038/00000012/art00004