TiCl<sub>4</sub> mediated facile synthesis of 1,3,4-oxadiazoles and 1,3,4-thiadiazoles
作者:Lin Zhang、Yu Yu、Qiang Tang、Jianyong Yuan、Dongzhi Ran、Binghua Tian、Tao Pan、Zongjie Gan
DOI:10.1080/00397911.2019.1700521
日期:2020.2.1
Abstract An efficient method for the synthesis of 2,5-disubstituted 1,3,4-oxadiazoles and 1,3,4-thiadiazoles has been developed. Various hydrazides or thionyl hydrazides readily react with DMA derivatives in the presence of TiCl4 as a catalyst to afford the desired products. This protocol provides a simple and economical procedure that affords the target products with good yields and wide substrate