Green oxidative cyclization to access 2,5-disubstituted-1,3,4-oxadiazoles from aldehydes and hydrazide derivatives using FeBr3 catalyst and hydrogen peroxide
作者:Jian Wang、Linyang Wang、Huilin Qin、Ruotong Tian、Yuliang Pan
DOI:10.1016/j.tetlet.2023.154783
日期:2023.11
2,5-disubstituted-1,3,4-oxadiazoles Oxidative cyclization of aldehydes and hydrazide derivatives to access 2,5-disubstituted-1,3,4-oxadiazoles has been developed using a catalytic amount of FeBr3 in the presence of aqueous hydrogen peroxide as an oxidant. By synthesizing 35 examples of 2,5-disubstituted 1,3,4-oxadiazoles, this approach was demonstrated to have good features including broad scope, mild
2,5-二取代-1,3,4-恶二唑已开发出在水溶液存在下使用催化量的 FeBr 3将醛和酰肼衍生物氧化环化以获得 2,5-二取代-1,3,4-恶二唑过氧化氢作为氧化剂。通过合成35个2,5-二取代1,3,4-恶二唑实例,证明该方法具有适用范围广、条件温和、耐空气/水、操作简单等优点。更重要的是,它有望在有机合成中得到广泛的应用。