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
可通过Z-氯肟,异氰酸酯和羟胺之间的新型三组分反应制备合成有用的氨基二氧肟,方法是通过[3 +1]环加成反应利用异氰酸酯对腈N-氧化物的优先攻击。还讨论了反应机理的量子力学研究结果。此外,首次报道了通过Mitsunobu-Beckmann重排将氨基二氧肟单锅转化为1,2,3-恶二唑-5-胺。