Ln[N(SiMe3)2]3-catalyzed cycloaddition of terminal alkynes to azides leading to 1,5-disubstituted 1,2,3-triazoles: new mechanistic features
作者:Longcheng Hong、Weijia Lin、Fangjun Zhang、Ruiting Liu、Xigeng Zhou
DOI:10.1039/c3cc42534g
日期:——
The first example of rare earth metal-catalyzed cycloaddition of terminal alkynes to azides resulting in the formation of 1,5-disubstituted 1,2,3-triazoles is described. Preliminary studies revealed that the present cycloaddition shows unprecedented mechanistic features involving a tandem anionic cascade cyclization and anti-addition across the CC triple bond.
首例稀土金属催化的末端炔烃与叠氮化合物的环加成反应,生成1,5-二取代的1,2,3-三唑,已被报道。初步研究表明,这一环加成反应展现出前所未有的机理特征,涉及串联的阴离子级联环化和反式加成穿过碳碳三键。