Metal-Free Synthesis of 1,3,4-Oxadiazoles from N′-(Arylmethyl)hydrazides or 1-(Arylmethyl)-2-(arylmethylene)hydrazines
作者:Zhenhua Shang、Sheng Tan、Qianqian Chu
DOI:10.1055/s-0034-1379974
日期:——
tert-butyl ether. Aldehyde N-acylhydrazones and aldazines were initially generated in situ as intermediates. An efficient and versatile metal-free synthesis of 1,3,4-oxadiazolesfrom N′-(arylmethyl)hydrazides or 1-(arylmethyl)-2-(arylmethylene)hydrazines through oxidative dehydrogenation is reported. A range of 2,5-disubstituted1,3,4-oxadiazoles were prepared by treating N′-(arylmethyl)hydrazides with (diacetoxyiodo)benzene
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.
The invention relates to heterocyclic derivatives, compositions comprising such compounds, and methods of preventing or treating conditions and disorders using such compounds and compositions. The heterocyclic derivatives, more particularly can be substituted oxadiazole compounds and derivatives thereof.