Copper(II) complexes of piperazine-derived tetradentate ligands and their chiral diazabicyclic analogues for catalytic phenol oxidative C–C coupling
作者:Ivan Castillo、Viridiana Pérez、Iván Monsalvo、P. Demare、Ignacio Regla
DOI:10.1016/j.inoche.2013.10.002
日期:2013.12
ligands (1S,4S)-2,5-bis(6-methylpyridyl)-diazabicyclo[2.2.1]heptane (L1) and (1S,4S)-2,5-bis(1-methyl-2-methylbenzimidazolyl)-diazabicyclo[2.2.1]heptane (L2) with CuCl2 results in the hydroxo-bridged dicopper complexes [(L1)Cu2(μ-OH)(H2O)Cl3] (3), and [(L2)Cu2(μ-OH)(H2O)Cl3] (4). Both chiral complexes were characterized spectroscopically, and 3 in the solid state by X-ray crystallography, confirming
摘要手性配体(1S,4S)-2,5-双(6-甲基吡啶基)-二氮杂双环[2.2.1]庚烷(L1)和(1S,4S)-2,5-双(1-甲基- 2-甲基苯并咪唑基)-二氮杂双环 [2.2.1] 庚烷 (L2) 与 CuCl2 生成羟基桥连的双铜配合物 [(L1)Cu2(μ-OH)(H2O)Cl3] (3) 和 [(L2)Cu2 (μ-OH)(H2O)Cl3] (4)。两种手性配合物均通过光谱表征,3 为固态 X 射线晶体学,证实它们在结构上与其先前报道的醋酸铜类似物(1 和 2)相关,因为它们具有羟基桥连的双金属核。使用非手性配体类似物 N,N'-双(2-甲基吡啶基)哌嗪(L3)和 N,N'-双(1-甲基-2-甲基苯并咪唑基)哌嗪(L4)与 CuCl2 得到相应的配合物,得到氯桥连的 [(L3)(CuCl)2(μ-Cl)2]n (5) 和 [(L4)(CuCl)2(μ-Cl)2] (6),两者都没有桥接羟基配体;相反,配合物