Palladium Complexes with Carbene and Phosphine Ligands: Synthesis, Structural Characterization, and Direct Arylation Reactions between Aryl Halides and Alkynes
作者:Kai-Ting Chan、Yi-Hua Tsai、Wu-Shien Lin、Jia-Rong Wu、Shih-Jung Chen、Fu-Xing Liao、Ching-Han Hu、Hon Man Lee
DOI:10.1021/om9009203
日期:2010.1.25
The new palladium complexes with NHC and phosphine ligands, cis-PdCl2(L2)(PPh3) (2), cis-PdBr2(L2)(PPh3) (3), and cis-PdCl2(L3)(PPh3) (4) were prepared following a general protocol of a one pot reaction between PdCl2(COD), PPh3, and the ligand precursors LH·Y (Y = Cl, Br, BF4) (L2 = 1,3-dibenzylimidazolin-2-ylidene; L3 = 1,3-dibenzylimidazol-2-ylidene). The cis-PdCl2(L3)(PCy3) complex (5) was prepared
具有NHC和膦配体,顺式-PdCl 2(L 2)(PPh 3)(2),顺式-PdBr 2(L 2)(PPh 3)(3)和顺式-PdCl 2(L 3)的新型钯配合物)(PPh 3)(4)遵循PdCl 2(COD),PPh 3和配体前体LH·Y(Y = Cl,Br,BF 4)(L 2 = 1,3-二苄基咪唑啉-2-亚甲基; L 3= 1,3-二苄基咪唑-2-亚甲基)。顺式-PdCl 2(L3)(PCy 3)配合物(5)是通过4与PCy 3之间的配体取代反应制备的。通过加热PdCl 2(COD)和LH·BF的混合物获得具有NHC和吡啶配合物的钯配合物,反式PdCl 2(L)(py)(6:L = L 2 ; 7:L = L 3)在吡啶中为4。使用CH 3 CN作为溶剂,以KO t Bu作为碱的相似反应条件得到了顺式-PdCl 2(L 3)2(8)。配合2 - 8通过X射线晶体学研究成功表征了这些化