A Multicomponent Electrosynthesis of 1,5-Disubstituted and 1-Aryl 1,2,4-Triazoles
作者:Na Yang、Gaoqing Yuan
DOI:10.1021/acs.joc.8b01808
日期:2018.10.5
A novel electrochemical route has been developed for the synthesis of 1,5-disubstituted and 1-aryl 1,2,4-triazoles from aryl hydrazines, paraformaldehyde, NH4OAc, and alcohols. In this multicomponent reaction system, alcohols act as solvents as well as reactants and NH4OAc is used as the nitrogen source. With the assistance of reactive iodide radical or I2 and NH3 electrogenerated in situ, this process
已开发出一种新的电化学路线,用于从芳基肼,低聚甲醛,NH 4 OAc和醇类合成1,5-二取代和1-芳基1,2,4-三唑。在该多组分反应系统中,醇既充当溶剂又充当反应物,而NH 4 OAc被用作氮源。在反应性碘自由基或I 2和NH 3原位电生成的辅助下,此过程可有效避免使用强氧化剂和过渡金属催化剂,并在室温下平稳进行,得到各种各样的1,2, 4-三唑衍生物具有良好的高收率。初步研究表明,反应机理涉及一个自由基过程。