Discoveries and Challenges en Route to Swinhoeisterol A
作者:Fenja L. Duecker、Robert C. Heinze、Simon Steinhauer、Philipp Heretsch
DOI:10.1002/chem.202001405
日期:2020.8.6
synthetic studies is reported that culminated in the first synthesis of 13(14→8),14(8→7)diabeo‐steroid swinhoeisterol A as well as the related dankasterones A and B, 13(14→8)abeo‐steroids, and periconiastone A, a 13(14→8)abeo‐4,14‐cyclo‐steroid. Experiments are described in detail that provided further insight into the mechanism of the switchable radical framework reconstruction approach. By discussing failed
Synthesis of the Alleged Structures of Fortisterol and Herbarulide and Structural Revision of Herbarulide
作者:Fenja L. Duecker、Robert C. Heinze、Mira Mueller、Sudong Zhang、Philipp Heretsch
DOI:10.1021/acs.orglett.0c00180
日期:2020.2.21
The allegedstructures of 5,6-epoxy-5,6-secosteroids fortisterol and herbarulide differ only in the stereoconfiguration of C24. Applying insights into the hypothetical biosynthesis of this class of natural products, we devised a short synthetic access (four and eight steps, respectively) starting from commercial ergosterol and featuring an alkoxy radical rearrangement. The comparison of nuclear magnetic