presumably via an acid–base reactionbetween the superoxide ligand and the phenols. The reaction of (L)CuII–OO• with a series of triphenylphosphine derivatives gave the corresponding triphenylphosphine oxides via an electrophilic ionic substitution mechanism with a Hammett ρ value as −4.3, whereas the reaction with thioanisole (sulfide) only gave a copper(I) complex. These reactivities of (L)CuII–OO• are different
氧化还原的单核铜的特性(II)配合物过氧化物,(L)的Cu II -OO •,由三齿配体(L = 1-(2-苯乙基)-5- [2-(2-吡啶基)乙基]支持- 1,5- diazacyclooctane)已经被检查作为推定的活性中间体肽基α羟基化单加氧酶的(PHM的模型化合物)和多巴胺β单加氧酶(DβM)(Kunishita等人J. PM。化学会志2009年,131,2788年至2789年; 。无机化学。2012,51,9465-9480)。根据对一系列单电子还原剂的反应性,(L)Cu II -OO •的还原电位估计为0.19±0.07 V相对于在298K(比照Tahsini等SCE在丙酮Chem.-欧洲药典J. 2012,18,1084至1093年)。在TEMPO-H(2,2,6,6-四甲基哌啶-N-氢氧化物)的反应中,进行了简单的HAT(氢原子转移)反应,得到了相应的氢过氧化物配合物LCu
Mononuclear Copper(II)−Superoxo Complexes that Mimic the Structure and Reactivity of the Active Centers of PHM and DβM
Mononuclearcopper(II)-superoxocomplexes 2(X)-OO(*) having triplet (S = 1) ground states were obtained via reaction of O(2) with the copper(I) starting materials 1(X) supported by tridentate ligands L(X) [1-(2-p-X-phenethyl)-5-(2-pyridin-2-ylethyl)-1,5-diazacyclooctane; X = CH(3), H, NO(2)] in various solvents. The superoxo complexes 2(X)-OO(*) mimic the structure [tetrahedral geometry with an end-on