Oxidative Cyclization of Aromatic Aldehyde<i>N</i>‐Acylhydrazones by bis(Trifluoroacetoxy)iodobenzene
作者:Zhenhua Shang
DOI:10.1080/00397910600773650
日期:2006.10
Abstract Aromatic aldehyde N‐acylhydrazones were oxidized into 2,5‐disubstituted 1,3,4‐oxadiazoles with bis(trifluoroacetoxy)iodobenzene in CHCl3 or DMSO at room temperature in good to excellent yields.
Abstract 2-Aryl- and 2-alkenyl-1,3,4-oxadiazoles were efficiently synthesized in high yields by treatment of 1,3,4-oxadiazoles with aryl or alkenyl halides, respectively, in the presence of copper(II) oxide nanoparticles as a catalyst. The reusability of the catalyst is an important advantage in relation to practical applications of this synthesis. 2-Aryl- and 2-alkenyl-1,3,4-oxadiazoles were efficiently