Side-chain migration reactions and ring B aromatization in labdanes: scope and limitations. Synthesis of isofregenedane type tetrahydronaphthalenic diterpenes
The reaction of bicyclicditerpenes with an allylic oxygenated function or an equivalent functionality on ring B in the presence of I2/benzene afforded a simple and rapid synthesis of tetrahydronaphthalenic diterpenes of the isofregenedane class.
Isofregenedadiol: A novel diterpenic diol from Halimium viscosum
作者:Isidro S Marcos、Asunción Jorge、David Diez、Pilar Basabe、Anna M Lithgow、Maria J Sexmero、Narciso M Garrido、Julio G Urones
DOI:10.1016/0031-9422(95)00751-2
日期:1996.3
Abstract One of the chemotypes of Halimiumviscosum—La Fregeneda—provided a new natural product with a rearranged skeleton. The new bicyclic diol possesses an aromatic ring B and its structure has been determined on the basis of 1H, 13C and 2D NMR (1H13C HETCOR and 1H13C long range inverse detected HMBC) studies.