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Unsymmetrical chiral PCN pincer palladium(II) and nickel(II) complexes of (imidazolinyl)aryl phosphinite ligands: Synthesis via ligand C-H activation, crystal structures, and catalytic studies

Organometallics, ISSN: 0276-7333, Vol: 29, Issue: 11, Page: 2579-2587
2010
  • 84
    Citations
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    Usage
  • 38
    Captures
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Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    84
    • Citation Indexes
      84
  • Captures
    38

Article Description

Six unsymmetrical chiral PCN pincer Pd(II) complexes 3a-f based on (imidazolinyl)aryl phosphinite ligands were easily synthesized from imidazolinyl-containing m-phenol derivatives 2a-e by one-pot phosphorylation/palladation reaction via C-H bond activation of the related ligands. An unsymmetrical chiral PCN pincer Ni(II) complex, 4a, was first obtained in a similar way. The palladium-chloride complex 3e could be readily converted to the corresponding iodide derivative 5e by the halide exchange reaction with KI. All eight complexes were characterized by X-ray crystal structure determination. Each complex adopts a typical distorted-square-planar geometry. The Pd complexes were shown to be active catalysts with rather moderate enantioselectivities (up to 32% ee) for asymmetric Suzuki-Miyaura reaction. © 2010 American Chemical Society.

Bibliographic Details

Ben Shang Zhang; Wei Wang; Dan Dan Shao; Xin Qi Hao; Jun Fang Gong; Mao Ping Song

American Chemical Society (ACS)

Chemistry

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