Total Synthesis of 7-Hydroxymurrayazolinine, Murrayamine D, and Mahanine via <i>m</i>-Nitro Group Activated Pyran Annulation
作者:Shujie Hou、Yong Liu、Yali Kong、Milton L. Brown
DOI:10.1021/acs.orglett.5b00422
日期:2015.5.15
The facile total synthesis of the natural product (±)-mahanine was obtained in eight steps with an overall 52% yield from readily accessible known nitrophenol derivative 6. After a one-step, acid-catalyzed annulation, two additional natural products were formed including 7-hydroxymurrayazolinine, representing its first reported total synthesis. In the whole process, the introduction of the m-nitro
八步合成天然产物(±)-甘氨酸的简便全合成,从已知的硝基酚衍生物6的总收率达52%。经过一步一步的酸催化环化反应后,形成了另外两个天然产物,包括7-羟基Murrayazolinine,代表了其首次报道的总合成。在整个过程中,在引入的米硝基组显著增强,可通过电感效应的关键吡喃环反应。