DMF as Methine Source: Copper‐Catalyzed Direct Annulation of Hydrazides to 1,3,4‐Oxadiazoles
作者:Shoucai Wang、Kai Wang、Xiangfei Kong、Shuhua Zhang、Guangbin Jiang、Fanghua Ji
DOI:10.1002/adsc.201900395
日期:2019.9.3
unprecedented Cu‐catalyzed direct annulation of hydrazides with N,N‐dimethylformamide (DMF) was developed, providing an efficient synthesis of valuable 1,3,4‐oxadiazoles. This process features the short reaction time and can be safely conducted on gram scale. The reaction also facilitated the convenient synthesis of 1,3,4‐oxadiazole‐2(3H)‐ones. Moreover, the mechanistic studies suggest that the source of CH is
开发了前所未有的Cu催化的N,N-二甲基甲酰胺(DMF)酰肼直接环化反应,可有效合成有价值的1,3,4-恶二唑。该过程的反应时间短,可以安全地以克为单位进行。该反应还促进了1,3,4-恶二唑-2(3 H)-one的便捷合成。此外,机理研究表明,CH的来源是DMF的N-甲基。