3-Spirocyclopropanedihydro- and -tetrahydropyridin-4-ones from Nitrone Cycloadducts of Bicyclopropylidene via 1-(1′-Aminomethylcyclopropyl)cyclopropanol under PdII Catalysis
作者:Julia Revuelta、Stefano Cicchi、Armin de Meijere、Alberto Brandi
DOI:10.1002/ejoc.200700912
日期:2008.2
A series of 3-spirocyclopropanedihydro- and -tetrahydropyrid-4-ones have been synthesized by nitrone cycloaddition to 1,1′-bicyclopropylidene (BCP), chemoselective reduction of the N–O bond of the isoxazolidine ring, and PdII-catalyzed cascade rearrangement of the β-aminocyclopropanol derivatives into the final products. The new tetrahydropyridone derivatives were also prepared by thermal rearrangement