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
通过硝酮环加成到 1,1'-双环亚丙基 (BCP)、异恶唑烷环的 N-O 键的化学选择性还原和 PdII 催化的级联重排合成了一系列 3-螺环丙烷二氢和 -四氢吡啶-4-酮β-氨基环丙醇衍生物转化为最终产品。新的四氢吡啶酮衍生物也是通过异恶唑烷的热重排制备的。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)