Palladacyclic complexes bearing CNN-type ligands as catalysts in the Heck reaction

被引：26
作者：
Chen, CT [1 ]
Chan, YS [1 ]
Tzeng, YR [1 ]
Chen, MT [1 ]
机构：
[1] Natl Chung Hsing Univ, Dept Chem, Taichung 402, Taiwan
来源：
DALTON TRANSACTIONS | 2004年 / 17期
关键词：
D O I：
10.1039/b404798b
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Preparations of novel unsymmetrical, tridentate nitrogen ligand precursors, PhN=C(CMe2)(NPh)C=N(CH2)(2)NMe2 (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-eta(1)-Ph)C=N(CH2)(2)NMe2] 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-eta(1)-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.
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收藏
页码：2691 / 2696
页数：6
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