Synthesis of 3-Trifluoromethyl-1,2,4-triazolines and 1,2,4-Triazoles via Tandem Addition/Cyclization of Trifluoromethyl <i>N</i>-Acylhydrazones with Cyanamide
作者:Xiaoling Liu、Haimei Liu、Chang Bian、Ke-Hu Wang、Junjiao Wang、Danfeng Huang、Yingpeng Su、Xiaobo Lv、Yulai Hu
DOI:10.1021/acs.joc.2c00176
日期:2022.5.6
A tandem addition/cyclization reaction between trifluoromethyl N-acylhydrazones and cyanamide is described, which provides a novel and efficient process for the synthesis of polysubstituted 3-trifluoromethyl-1,2,4-triazolines and their derivatives. The method has the advantages of mild reaction conditions, a broad substrate scope, good product yields, and atom economy.