Copper(<scp>ii</scp>) complexes supported by click generated mixed NN, NO, and NS 1,2,3-triazole based ligands and their catalytic activity in azide–alkyne cycloaddition
作者:Daniel Mendoza-Espinosa、Guillermo Enrique Negrón-Silva、Deyanira Ángeles-Beltrán、Alejandro Álvarez-Hernández、Oscar R. Suárez-Castillo、Rosa Santillán
DOI:10.1039/c4dt00323c
日期:——
new copper(II) complexes supported by click generated mixed NN, NO, and NS 1,2,3-triazoles are reported. The four complexes display a 1 : 2 copper/ligand ratio and give monomeric units in the solid state. Crystal structures demonstrate that depending on the flexibility of the ligand NX (X = O, N, S) pendant arm, the coordination environment around the metal center can feature square planar or octahedral
报道了单击产生的混合NN,NO和NS 1,2,3-三唑支持的四种新的铜(II)配合物的制备和表征。四种配合物显示出1:2的铜/配体比率,并以固态形式提供单体单元。晶体结构表明,取决于配体NX(X = O,N,S)悬臂的柔韧性,金属中心周围的配位环境可以具有正方形平面或八面体的几何形状。在室温下,使用抗坏血酸钠作为还原剂和水-乙醇作为溶剂混合物,在铜催化的炔-叠氮化物环加成(CuAAC)反应中,所有四种络合物均具有催化活性。综合大楼8由NS配体支持的化合物显示了该系列中最佳的催化性能,从而允许在低催化剂负载量下轻松,高收率地制备各种单,双和三,1,2,3-三唑。