Base-mediated reaction of vinyl bromides with aryl azides: one-pot synthesis of 1,5-disubstituted 1,2,3-triazoles
作者:Luyong Wu、Yuxue Chen、Jianheng Luo、Qi Sun、Mingsheng Peng、Qiang Lin
DOI:10.1016/j.tetlet.2014.03.029
日期:2014.7
been investigated in the process. A variety of 1,5-disubstituted triazoles were prepared in low to good yields. Further studies reveal that the corresponding alkynes were produced as intermediates via elimination reaction. Under the same reaction conditions, the reactions of alkyl alkynes with phenyl azide would give 1,5-disubstituted1,2,3-triazoles.
Transition-metal-free regioselective construction of 1,5-diaryl-1,2,3-triazoles through dehydrative cycloaddition of alcohols with aryl azides mediated by SO<sub>2</sub>F<sub>2</sub>
作者:Xu Zhang、K. P. Rakesh、Hua-Li Qin
DOI:10.1039/c8cc09693g
日期:——
A novel, simple and practical method for mild, efficient, cost-effective and regioselective synthesis of highly valuable 1,5-diaryl-1,2,3-triazoles was developed.
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.