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標題: Preparation of a cobalt-containing P,N-bidentate ligand ligated palladium complex: Its applications in amination and Suzuki cross-coupling reactions
作者: Chiang, W.Y.
Hong, F.E.
關鍵字: Bidentate ligand;P,N-ligand;Palladium complex;Cobalt complex;Suzuki;reaction;Amination;cationic rhodium complexes;aryl bond formation;c-o bond;room-temperature;molecular-structure;mild conditions;selective;hydrogenation;reductive elimination;catalyzed amination;binuclear;complexes
Project: Journal of Organometallic Chemistry
期刊/報告no:: Journal of Organometallic Chemistry, Volume 694, Issue 9-10, Page(s) 1473-1481.
A cobalt-containing P,N-ligand, alkyne-bridged dicobalt phosphine [(mu-PPh(2)CH(2)PPh(2))Co(2)(CO)(4) (mu,eta-Me(2)NCH(2)C = CP(Cy)(2))] (4c), was prepared from the reaction of Me(2)NCH(2)C = CPR(2) (2c) with a dppm-bridged dicobalt complex [Co(2)(CO)(6)(mu-P,P-PPh(2)CH(2)PPh(2))] (3). Further reaction of 4c with Pd(COD)Cl(2) gave a 4c-chelated palladium dichloride complex (mu-PPh(2)CH(2)PPh(2))Co(2)(CO)(4) (mu,eta-Cy(2)PC = CCH(2)NMe(2))- PdCl(2) (5c). Compound 5c was characterized by spectroscopic methods and crystal structure of 5c was determined by single-crystal X-ray diffraction techniques. It shows that 4c is an authentic cobalt-containing P,N-bidentate ligand. Amination and Suzuki reactions employing either a 4c/palladium salt system or an isolated 5c as the catalytic precursor led to satisfactory results. (c) 2009 Elsevier B.V. All rights reserved.
ISSN: 0022-328X
DOI: 10.1016/j.jorganchem.2008.12.046
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