期刊
JOURNAL OF ORGANOMETALLIC CHEMISTRY
卷 693, 期 12, 页码 2147-2152出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jorganchem.2008.03.015
关键词
palladium; phosphane ligands; dendrimers; aqueous-phase catalysis; C-C coupling
The synthesis of diphenylarylphosphane and 1,2-bis(diarylphosphanyl)ethane ligands, where the aryl group is -C6H4CH2CH2SiMe2CH2OC6H4-3-NMe2, their palladium(II) complexes, and their corresponding ammonium-quaternized derivatives is described. These new phosphanes were devised as models of potentially water-soluble dendritic carbosilane ligands, although the solubility brought about by the quaternized N-trimethylanilinium groups is scarce. The palladium(II) complexes have been fully characterized by H-1, C-13, and P-31 NMR spectroscopy and mass spectrometry, and have been tested in the Hiyama cross-coupling reaction between tri(methoxy)phenylsilane and 3-bromopyridine in aqueous sodium hydroxide solution. (C) 2008 Elsevier B.V. All rights reserved.
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