selective synthesis of 3-acyl-1,2,4-oxadiazoles fromalkynes and nitriles has been developed under iron(III) nitrate-mediated conditions. The mechanism includes three sequential procedures: iron(III) nitrate-mediated nitration of alkynes leads to α-nitroketones, dehydration of α-nitroketones provides the nitrile oxides, and 1,3-dipolar cycloaddition of nitrile oxides with nitriles produces 3-acyl-1
Y(OTf)<sub>3</sub>‐Catalyzed, One‐Pot Synthesis of 1,2,4‐Oxadiazole Derivatives
作者:Chuanming Yu、Min Lei、Weike Su、Yuanyuan Xie
DOI:10.1080/00397910701577695
日期:2007.11
Lanthanide nitrates as Lewis acids in the one-pot synthesis of 1,2,4-oxadiazole derivatives
作者:Juliana A. Vale、Wagner M. Faustino、Davila de S. Zampieri、Paulo J. S. Moran、José A. R. Rodrigues、Gilberto F. de Sá
DOI:10.1590/s0103-50532012005000002
日期:——
In this work we report the use of lanthanide nitrates [Ln(NO3)(3)] acting as catalyst in direct one-pot synthesis of 3-benzoyl- and 3-acetyl-1,2,4-oxadiazoles derivatives from ketones, nitriles and nitric acid. This is the first example of one-pot synthesis of benzoyl-and acetyl 1,2,4-oxadiazoles derivatives preparation using acetophenones derivates with electron-donator groups.