Dehydromicrosclerodermin B and Microsclerodermin J: Total Synthesis and Structural Revision
作者:Ekaterina Y. Melikhova、Robert D. C. Pullin、Christian Winter、Timothy J. Donohoe
DOI:10.1002/anie.201604764
日期:2016.8.8
The total synthesis of dehydromicrosclerodermin B and microsclerodermin J is described. Efficient approaches to the unusual amino acids in the target molecules were developed on the basis of a Negishi coupling (for Trp-2-CO2 H) and Blaise reaction (for Pyrr). An incorrect assignment of the pyrrolidinone stereochemistry of both compounds was confirmed by synthesizing epimers of the proposed structures
描述了脱氢微核蛋白B和微核蛋白J的全合成。在Negishi偶联(对于Trp-2-CO2 H)和Blaise反应(对于Pyrr)的基础上,开发了有效的方法来解决目标分子中不常见氨基酸的问题。通过合成拟议结构的差向异构体,证实了两种化合物的吡咯烷酮立体化学分配不正确。这些差向异构体的光谱数据与天然衍生材料的光谱数据完全一致。