Total Synthesis and Structure Confirmation of the Annonaceous Acetogenins 30(<i>S</i>)-Hydroxybullatacin, Uvarigrandin A, and 5(<i>R</i>)-Uvarigrandin A (Narumicin I?)
作者:James A. Marshall、Arnaud Piettre、Mikell A. Paige、Frederick Valeriote
DOI:10.1021/jo0266137
日期:2003.3.1
A synthesis of the bistetrahydrofuran Annonaceous acetogenins 30(S)-hydroxybullatacin, uvarigrandin A, and 5(R)-uvarigrandin A through application of a previously disclosed four-component modular approach is described in which extended core segments are coupled to a C4- or C5-hydroxy butenolide terminus. The butenolide termini segments were prepared from (S)- or (R)-malic acid. Spectral properties
通过应用先前公开的四组分模块化方法,描述了双四氢呋喃壬酸产乙酸原素30(S)-羟基bullatacin,uvarigrandin A和5(R)-uvarigrandin A的合成,其中延伸的核心链段与C4-或-C偶联。 C5-羟基丁烯内酯末端。丁烯酸内酯末端片段由(S)-或(R)-苹果酸制备。合成的30(S)-羟基bullatacin和uvarigrandin A以及它们的Mosher酯衍生物的光谱性质与报道的天然物质值非常吻合。合成的5(R)-紫丁香素A可能与那柔那霉素I相同,但是所报告的NMR光谱中的细微差异阻止了对此点的明确评估。