Molecular Rearrangements of (−)-Modhephene and (−)-Isocomene to a (−)-Triquinane
作者:Pedro Joseph-Nathan、Benito Reyes-Trejo、Martha S. Morales-Ríos
DOI:10.1021/jo060258t
日期:2006.6.1
further rearrangement of (−)-modhephene (1) to a (−)-triquinane 5 has been assessed through acid catalysis. The rearrangement involved protonation, 1,2 σ-bond and methyl shifts, and deprotonation. Monitored experiments by 1H NMR spectroscopy suggested the intermediate (−)-isocomene (3), which was further evidenced when a sample of natural (−)-3 undergoes acid-catalyzed conversion to the (−)-triquinane