Glucopyranoside-Incorporated N-Heterocyclic Carbene Complexes of Silver(I) and Palladium(II): Efficient Water-Soluble Suzuki−Miyaura Coupling Palladium(II) Catalysts
作者:Chien-Chan Yang、Pei-Syuan Lin、Fu-Chen Liu、Ivan J. B. Lin、Gene-Hsian Lee、Shie-Ming Peng
DOI:10.1021/om100751r
日期:2010.11.22
silver(I) bis(carbene) complexes have been prepared through the reactions of silver oxide with related imidazolium salts. The palladium(II) bis(carbene) complexes were synthesized from their corresponding silver(I) complexes via the technique of transmetalation. In solution, both trans-anti and trans-syn rotamers are observed for these square-planar Pd(II) complexes. In the solid state, the complex [1-methyl-3-(methyl
通过氧化银与相关的咪唑鎓盐的反应,已经制备了含有葡糖吡喃糖苷的银(I)双(卡宾)配合物。钯(II)双(卡宾)配合物是通过相应的银(I)配合物通过金属转移技术合成的。在溶液中,这两种反式-反式和反式-顺式旋转异构体都观察到这些正方形平面的Pd(II)配合物。在固态下,配合物[1-甲基-3-(甲基2,3,4-三-O-苯甲酰基-6-脱氧-α- d-吡喃吡喃-6-基)咪唑-2-亚甲基] 2 PdBr 2采用反式构象,而配合物[1-乙基-3-(甲基2,3,4-三-O-苯甲酰基-6-脱氧-α- d-吡喃葡萄糖-6-基)咪唑-2-亚烷基] 2 PdBr 2和[1-正丁基-3-(甲基2,3,4-三-O-苯甲酰基-6-脱氧-α- d-吡喃葡萄糖- 6-基)咪唑-2-亚基] 2 PdBr 2具有反式-顺式构象。最后两个反式-syn-化合物中两个吡喃葡萄糖苷基团之间的空间拥挤可能通过咪唑环的倾斜和柔性CH 2的