From Amino Acids to Enantiopure Bicyclic Isoxazolidinylpyridin-4(1H)-ones through Intramolecular Nitrone Cycloadditions
作者:Roberto Romeo、Daniela Iannazzo、Anna Piperno、Maria A. Chiacchio、Antonino Corsaro、Antonio Rescifina
DOI:10.1002/ejoc.200400847
日期:2005.6
Homochiral bicyclic isoxazolidinylpyridin-4(1H)-ones have been synthesised by an intramolecular nitrone cycloaddition process, starting from homochiral β-amino acids. Stereoselection at C2 or C3 of the acyclic substrate appears to give the best results in the control of the stereochemistry of the new formed chiral centres. The synthetic approach has been further directed towards functionalised piperidones
同手性双环异恶唑烷基吡啶-4(1H)-酮是通过分子内硝酮环加成过程合成的,起始于同手性 β-氨基酸。无环底物的 C2 或 C3 处的立体选择似乎在控制新形成的手性中心的立体化学方面给出了最好的结果。合成方法进一步针对功能化的哌啶酮。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)