Synthesis of 3,4,5-Trisubstituted 1,2,4-Triazoles via I<sub>2</sub>-Catalyzed Cycloaddition of Amidines with Hydrazones
作者:Xing Li、Xinyufei Yuan、Yuting Wu、Honghong Guo、Qiang Liu、Shuangping Huang
DOI:10.1021/acs.joc.3c02637
日期:2024.4.19
A general and practical method for the construction of various 3,4,5-trisubstituted 1,2,4-triazoles via I2-catalyzed cycloaddition of N-functionalized amidines with hydrazones is reported. This strategy features cheap and readily available catalyst and starting materials, broader substrate scope, and moderate-to-good yields. The mechanism study shows that the existence of hydrogen on the nitrogen of
报道了一种通过 I 2催化N官能化脒与腙的环加成反应构建各种 3,4,5-三取代 1,2,4-三唑的通用且实用的方法。该策略的特点是廉价且易于获得的催化剂和起始材料、更广泛的底物范围以及中等至良好的产率。机理研究表明,腙氮上氢的存在对于这种转变至关重要。