Dihydro[<i>c</i>]benzazepin-3-ones via Conjugated Nitrone−Allene Precursors
作者:Karin Knobloch、Wolfgang Eberbach
DOI:10.1021/ol0056832
日期:2000.4.1
[formula: see text] Treatment of o-propargylaryl nitrones with base provided 1,2-dihydro[c]benzazepin-3-ones in good yields. The straightforward transformation is explained on the basis of a multistep rearrangement involving conjugated allene-nitrones as precursors of a 1,7-dipolar electrocyclization process that is followed by further bond reorganizations.