Palladium(II) complexes of Y,C,Y‐chelated phosphines: synthesis,structure, and catalytic activity in Suzuki–Miyaura reaction |
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| Authors: | Tomá? ?ezní?ek Libor Dostál Ale? R??i?ka Ji?í Kulhánek Filip Bure? Roman Jambor |
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| Institution: | 1. Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, CZ‐53210, Pardubice, Czech Republic;2. Institute of Organic Chemistry and Technology, Faculty of Chemical Technology, University of Pardubice, Studentská 573, CZ‐53210, Pardubice, Czech Republic |
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| Abstract: | The phosphines L1PPh2 (1) and L2PPh2 (2) containing different Y,C,Y‐chelating ligands, L1 = 2,6‐(tBuOCH2)2C6H3? and L2 = 2,6‐(Me2NCH2)2C6H3?, were treated with PdCl2 and di‐µ‐chloro‐bis2‐(N,N‐dimethylamino)methyl]phenyl‐C,N]‐dipalladium(II) and yielded complexes trans‐{2,6‐(tBuOCH2)2C6H3]PPh2}2PdCl2 (3), {2,6‐(Me2NCH2)2C6H3]PPh2} PdCl2 (4), {2,6‐(tBuOCH2)2C6H3]PPh2}Pd(Cl)2‐(Me2NCH2)C6H4] (5) and {2,6‐(Me2NCH2)2C6H3]PPh2}Pd(Cl)2‐(Me2NCH2)C6H4] (6) as the result of different ability of starting phosphines 1 and 2 to complex PdCl2. Compounds 3–6 were characterized by 1H, 13C, 31P NMR spectroscopy and ESI‐MS. The molecular structures of 3,4 and 6 were also determined by X‐ray diffraction analysis. The catalytic activity of complexes 3–6 was evaluated in the Suzuki‐Miyaura cross‐coupling reaction. Copyright © 2010 John Wiley & Sons, Ltd. |
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| Keywords: | Y C Y ligands palladium chelates Suzuki‐Miyaura C?C coupling |
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