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Palladium(II) complexes with the unsymmetrical H-spirophosphorane ligand HP(OCMe2CMe2O)(OCH2CMe2NH): synthesis, structural and catalytic studies.
Autorzy
Rok wydania
2011
Czasopismo
Journal of Organometallic Chemistry
Numer woluminu
696
Strony
2985-2992
DOI
10.1016/j.jorganchem.2011.05.008
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
We have investigated the reactivity of the unsymmetrical H-spirophosphorane (HSP) ligand HP(OCMe2CMe2O)(OCH2CMe2NH) 1 towards different palladium(II) precursors and synthesised the mononuclear complexes [PdCl2{P(OCMe2CMe2O)OCH2CMe2NH2}] 2 and [PdCl(C3H5){P(OCMe2CMe2O)OCH2CMe2NH2}] 3. The structural features of the compounds are characterised by spectroscopic methods as well as single crystal X-ray diffraction studies. The complexes are shown to be remarkably active precatalysts for the Heck and Hiyama cross-coupling reactions. The products of the C–C bond formation reactions were obtained with high conversion and stereoselectivity. Mechanistic studies of the Heck reaction reveal that, besides homogenous precatalysts, also heterogeneous Pd(0) nanoparticles are involved in the catalytic process.
Słowa kluczowe
Hydrophosphoranes, palladium, C–C bond formation, Heck reaction, Hiyama reaction
Adres publiczny
https://doi.org/10.1016/j.jorganchem.2011.05.008
Strona internetowa wydawcy
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