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Syntheses, Characterization and Catalytic Application of Palladacycles Containing Phosphane or Phosphane Oxide Functionalities
Author(s) -
Peng KuoFu,
Chen MingTsz,
Huang ChiAn,
Chen ChiTien
Publication year - 2008
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200800007
Subject(s) - chemistry , palladium , methanol , halide , medicinal chemistry , catalysis , ligand (biochemistry) , aryl , crystal structure , stereochemistry , aryl halide , organic chemistry , receptor , biochemistry , alkyl
The preparation of ligand precursors PhN=C(CMe 2 )(NPh)C=N(CH 2 ) 2 PPh 2 ( 1 ) and PhN=C(CMe 2 )(NPh)C=N(CH 2 ) 2 P(O)Ph 2 ( 2 ) are described. Treatment of 1 or 2 with 1 mol equiv. Pd(OAc) 2 affords orthometallated palladium(II) complexes [PhN=C(CMe 2 )(N‐η 1 ‐Ph)C=N(CH 2 ) 2 PPh 2 ]Pd(OAc) ( 3 ) as a mononuclear complex or {[PhN=C(CMe 2 )(N‐η 1 ‐Ph)C=N(CH 2 ) 2 P(O)Ph 2 ]Pd(OAc)} 2 ( 4 ) as an acetate‐bridged dinuclear complex, respectively. Reaction of 3 with excess LiCl in methanol affords a mononuclear palladium(II) complex [PhN=C(CMe 2 )(N‐η 1 ‐Ph)C=N(CH 2 ) 2 PPh 2 ]PdCl ( 5 ). The crystal and molecular structures are reported for compounds 3 – 5 . Application of these novel palladacyclic complexes to the Suzuki and Heck reactions with aryl halide substrates was examined. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)