Copper Immobilized on Nanosilica Triazine Dendrimer (Cu(II)-TD@nSiO<sub>2</sub>)-Catalyzed Regioselective Synthesis of 1,4-Disubstituted 1,2,3-Triazoles and Bis- and Tris-Triazoles via a One-Pot Multicomponent Click Reaction
作者:Mahboobeh Nasr-Esfahani、Iraj Mohammadpoor-Baltork、Ahmad R. Khosropour、Majid Moghadam、Valiollah Mirkhani、Shahram Tangestaninejad、Hadi Amiri Rudbari
DOI:10.1021/jo402170n
日期:2014.2.7
An efficient, atom-economical, and regioselective synthesis of a wide range of 1,4-disubstituted 1,2,3-triazoles in excellent yields has been achieved via a one-pot three-component reaction of alkynes and sodium azide with organic halides or alpha-bromo ketones catalyzed by Cu(II)-TD@ nSiO(2)/sodium ascorbate at room temperature. This catalytic system also showed excellent activity in the synthesis of bis- and tris-1,4-substituted 1,2,3-triazoles. Moreover, the catalyst could be recycled and reused for seven cycles without any loss in its catalytic activity.