777097-51-5Relevant academic research and scientific papers
Palladacyclic complexes bearing CNN-type ligands as catalysts in the Heck reaction
Chen, Chi-Tien,Chan, Yi-Sen,Tzeng, Yi-Ren,Chen, Ming-Tsz
, p. 2691 - 2696 (2007/10/03)
Preparations of novel unsymmetrical, tridentate nitrogen ligand precursors, PhN=C(CMe2)(NPh)C=N(CH2)2NMe2 (1) and PhN=C(CMe2)(NPh)C=N(CH2)Py (2), are described. Treatment of 1 with 1 molar equiv. (COD)PdCl2 in the presence of NEt3 or with 1 molar equiv. Pd(OAc)2 affords orthometallated palladium(II) complexes, [PhN=C(CMe2)-(N- η1-Ph)C=N(CH2)2NMe2]PdX (X = Cl (3); X = OAc (4)), respectively. Compound 3 can be yielded via the reaction of 4 with an excess of LiCl in methanol. Treatment of 2 with 1 molar equiv. of (COD)PdCl2, Pd(OAc)2 or Pd(TFA)2 affords orthometallated palladium(II) complexes, [PhN=C(CMe2)(N- η1-Ph)C=NCH2Py]PdX (X = Cl (5); X = OAc (6); X = TFA (7)), respectively. The crystal and molecular structures are reported for compounds 2, 3, 5 and 6. The application of these novel palladacyclic complexes to the Heck reaction with aryl halide substrates was examined.
