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
Modhephene: a sesquiterpenoid carbocyclic [3.3.3]propellane. X-Ray crystal structure of the corresponding diol
作者:L. H. Zalkow、R. N. Harris、D. Van Derveer
DOI:10.1039/c39780000420
日期:——
Modhephene (2), a new sesquiterpene representing the first naturally occurring carbocyclic [3.3.3]propellane, has been isolated from the toxic plant IsocomaWrightii; its structure was confirmed by X-ray analysis of the corresponding diol (3).