Synthesis of (±)-eriobrucinol and regioisomeric monoterpenoid coumarins, using intramolecular cycloadditions
作者:Leslie Crombie、Sally D. Redshaw、David A. Slack、Donald A. Whiting
DOI:10.1039/p19830001411
日期:——
the three regioisomers (8), (13), and (16), of the eriobrucinol structure, are reported. The (±)-cyclol (8) is spectrally identical with natural (–)-eriobrucinol from Eriostemon brucei, thus confirming Jefferies and Worth's structural proposal by synthesis.
作者:Aaron J. Day、Joel H. Z. Lee、Quang D. Phan、Hiu C. Lam、Adam Ametovski、Christopher J. Sumby、Stephen G. Bell、Jonathan H. George
DOI:10.1002/anie.201812432
日期:2019.1.28
The first total synthesis of bruceol has been achieved using a biomimetic cascade cyclization initiated by a stereoselective Jacobsen–Katsuki epoxidation (and kinetic resolution) of racemic protobruceol‐I. A bacterial cytochrome P450 monooxygenase was also found to catalyze the conversion of protobruceol‐I into bruceol. The first full analysis of the NMR data of natural bruceol suggested that “isobruceol”