Palladium Catalysts with Sulfonate-Functionalized-NHC Ligands for Suzuki−Miyaura Cross-Coupling Reactions in Water
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Altres documents de l'autoria: Godoy, Fernando; Peris, Eduardo; Segarra, Candela; Poyatos, Macarena
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http://dx.doi.org/10.1021/om100960t |
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Títol
Palladium Catalysts with Sulfonate-Functionalized-NHC Ligands for Suzuki−Miyaura Cross-Coupling Reactions in WaterData de publicació
2011-02-03Editor
American Chemical SocietyCita bibliogràfica
Organometallics, 2011, 30 (4), pp 684–688Tipus de document
info:eu-repo/semantics/articleVersió de l'editorial
http://pubs.acs.org/doi/full/10.1021/om100960tVersió
info:eu-repo/semantics/publishedVersionParaules clau / Matèries
Resum
Four new Pd(II) complexes containing sulfonate-functionalized N-heterocyclic carbene ligands have been synthesized. All new complexes are palladium bis-NHCs, in which the ligands adopt a monodentate, bis-chelating, ... [+]
Four new Pd(II) complexes containing sulfonate-functionalized N-heterocyclic carbene ligands have been synthesized. All new complexes are palladium bis-NHCs, in which the ligands adopt a monodentate, bis-chelating, and pincer coordination form, so that a good comparison between their catalytic activities can be performed. The complexes have been used in the Suzuki−Miyaura cross-coupling reaction between aryl halides and phenylboronic acid in water and in iPrOH/water. The bis-NHC-palladium complex 1, in which the two NHC ligands are in a relative cis configuration, affords the best catalytic outcomes, with high TON values of 105 for 4-bromoacetophenone and 3.7 × 104 for 4-chloroacetophenone. [-]
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