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標題: Palladium catalyzed Suzuki cross-coupling reactions using N,O-bidentate ligands
作者: Lai, Y.C.
Chen, H.Y.
Hung, W.C.
Lin, C.C.
Hong, F.E.
關鍵字: Suzuki reaction;palladium complex;Schiff-base;bidentate ligand;temperature ionic liquids;room-temperature;c-c;potassium fluoride;aryl chlorides;bond formation;aqueous-media;boronic acids;efficient;complexes
Project: Tetrahedron
期刊/報告no:: Tetrahedron, Volume 61, Issue 40, Page(s) 9484-9489.
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.
ISSN: 0040-4020
DOI: 10.1016/j.tet.2005.08.005
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