Synthesis of 5a-α-Tocopheryl Azide and Its Reaction to 1-(5a-α-Tocopheryl)-1,2,3-triazols by [2+3]-Cycloaddition
作者:Christian Adelwöhrer、Thomas Rosenau、Elisabeth Kloser、Kurt Mereiter、Thomas Netscher
DOI:10.1002/ejoc.200500898
日期:2006.5
1,2,3-Triazoles with 1-position substituents, derived from α-tocopherol (vitamin E), were synthesized by 1,3-dipolar cycloaddition reactions of 5a-azido-α-tocopheryl acetate with alkynes, and were fully analytically characterized. NMR spectra of the compounds and crystal structures of derivatives with a truncated isoprenoid side chain are presented. The tocopheryl moiety is readily cleaved in basic
具有 1 位取代基的 1,2,3-三唑类化合物源自 α-生育酚(维生素 E),通过 5a-叠氮基-α-生育酚乙酸酯与炔烃的 1,3-偶极环加成反应合成,并经过全面分析表征. 提供了化合物的 NMR 光谱和具有截短的类异戊二烯侧链的衍生物的晶体结构。生育酚部分在碱性介质中很容易裂解,这是在显示 pH 依赖性药物释放的递送系统中使用的先决条件。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)