Exploring the Chemistry of Bicyclic Isoxazolidines for the Multicomponent Synthesis of Glycomimetic Building Blocks
作者:Jorin Hoogenboom、Martin Lutz、Han Zuilhof、Tom Wennekes
DOI:10.1021/acs.joc.6b01515
日期:2016.10.7
pipecolic acid derivatives, a recurring motif in various prescription drugs, could be obtained via a one-pot Staudinger/aza-Wittig/Ugi three-component reaction of a bicyclic isoxazolidine-derived azido-hemiacetal. Notably, specific pipecolic acids in this library were obtained via hydrolysis of an unique tricyclic imidate side product of the Ugi reaction. The azido-hemiacetal was also converted into an
从手性呋喃酮开始,硝酮-烯烃[3 + 2]环加成反应可用于获得双环异恶唑烷,对此我们报道了一组选择性修饰每个功能位置的反应。这些合成上通用的双环异恶唑烷使我们能够通过多组分化学方法获得复杂的仿糖结构单元,如亚氨基糖。例如,可通过单锅Staudinger / aza-Wittig / Ugi三环异恶唑烷衍生的叠氮半缩醛的一锅Staudinger / aza-Wittig / Ugi三组分反应获得20种胡椒酸衍生物(各种处方药中的重复基序)的文库。值得注意的是,该文库中的特定胡椒酸是通过Ugi反应的独特三环亚氨酸酯副产物水解而获得的。叠氮半缩醛也被转化为氮杂-C-葡萄糖苷亚氨基糖通过史无前例的一锅施陶丁格/氮杂-维蒂希/曼尼希反应。