Alkyl Propiolates Participated [3+2] Annulation for the Switchable Synthesis of 1,5‐ and 1,4‐Disubstituted 1,2,3‐Triazoles Containing Ester Side Chain
作者:Shuo Cao、Yunyun Liu、Changfeng Hu、Chengping Wen、Jie‐Ping Wan
DOI:10.1002/cctc.201801366
日期:2018.11.7
By means of a featured enamine activation, the alkyl propiolates have been successfully employed in the [3+2] annulation for the synthesis of 1,2,3‐triazoles. The synthesis of both 1,4‐ as well as the hardly available 1,5‐disubstituted 1,2,3‐triazoles can be selectively accessed by using tosyl azide and tosyl hydrazine as nitrogen source, respectively.
通过特征性的烯胺活化,丙酸烷基酯已成功用于[3 + 2]环合中,用于合成1,2,3-三唑。通过分别使用甲苯磺酰甲苯磺酰基和甲苯磺酰肼作为氮源,可以选择性地获得1,4-以及几乎不可用的1,5-二取代的1,2,3-三唑的合成。