在此,我们展示了亚甲硅基和亚甲锗烷基的络合反应 [PhC(N t Bu) 2 EN(TMS) 2;E = Si ( A ) 和 Ge ( B )] 与几种铜 (I) 盐,并进一步利用它们 ( 1–6 ) 作为 CuAAC 反应中的有效催化剂。铜络合物(2和4–6)是通过 [PhC(N t Bu) 2 EN(TMS) 2 ] [E = Si ( A ) 或 Ge ( B )] 和 CuX (X = Br,我和 SCN)。2、4、5、6的分子结构_ _ _ _通过单晶 X 射线衍射研究建立。密度泛函理论研究表明,双金属 Cu 催化剂通过将反应物锚定在附近并减少偶极子和亲偶极体的前沿轨道之间的能隙来促进环加成反应。
A polymer-supported copper catalyst (Cu/HP20) is easily prepared in water and effectively catalyzed the Huisgen cycloaddition between azides and terminal alkynes.
Cu/HP20-Catalyzed Solvent-Free Huisgen Cycloaddition at Ordinary Temperatures
We have developed an environmentally friendly and highly efficient solvent-free Cu(I)-catalyzed azide-alkyne cycloaddition (CuAAC) reaction using a polymer-supported copper catalyst (Cu/HP20). Substrates poorly soluble in common organic solvents are also applicable to the present cycloaddition reaction without any solvents and provide the corresponding 1,4-triazole in high yields.