Journal
TETRAHEDRON
Volume 61, Issue 40, Pages 9484-9489Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2005.08.005
Keywords
Suzuki reaction; palladium complex; Schiff-base; bidentate ligand
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Palladium-catalyzed Suzuki cross-coupling reactions employing Schiff-bases as ligands toward a series of substituted arylbromides and boronic acids were pursued. In the presence of a N,O-bidentate ligand, 2-[1-(2,4,6-trimethyl-phenylimino)-ethyl] -phenol 5, the catalytic reactions could be carried out efficiently at room temperature with a wide array of arylbromides, even with electronically deactivated arenes. A deprotonated 5, 5', chelated palladium acetate complex, [5'Pd(II)(OAc)(solv)] 8, was proposed as a precursor of a genuine catalytically active species. (c) 2005 Elsevier Ltd. All rights reserved.
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