Multicomponent Reaction of<i>Z</i>-Chlorooximes, Isocyanides, and Hydroxylamines as Hypernucleophilic Traps. A One-Pot Route to Aminodioximes and Their Transformation into 5-Amino-1,2,4-oxadiazoles by Mitsunobu–Beckmann Rearrangement
作者:Valentina Mercalli、Alberto Massarotti、Monica Varese、Mariateresa Giustiniano、Fiorella Meneghetti、Ettore Novellino、Gian Cesare Tron
DOI:10.1021/acs.joc.5b01676
日期:2015.10.2
Synthetically useful aminodioximes are prepared via a novel three-component reaction among Z-chlorooximes, isocyanides, and hydroxylamines by exploiting the preferential attack of isocyanides to nitrile N-oxides via a [3 + 1] cycloaddition reaction. The results of quantum mechanical studies of the reaction mechanism are also discussed. Furthermore, the one-pot conversion of aminodioximes to 1,2,3-oxadiazole-5-amines