epoxy-8,9 α isopimarate de methyle;epoxy-8,9α isopimarate de methyle;methyl (1S,2S,6R,7R,10S,12S)-12-ethenyl-2,6,12-trimethyl-15-oxatetracyclo[8.4.1.01,10.02,7]pentadecane-6-carboxylate
Part. IV - Obtention de nouveaux squelettes diterpeniques tetracycliques lors d'isomerisation d'epoxydes-8,9 diterpeniques
作者:M. Taran、B. Delmond
DOI:10.1016/s0040-4020(01)82060-3
日期:1986.1
been studied. We report a rearrangement of tetrasubstituted epoxide leading to new tetracyclic diterpene skeletons. The nature of the bicyclo[3.2.1] octane moiety constituting the C/D ring system means that these new compounds could be related to stemodane and stemarane diterpenes. These rearrangements could provide a chemical test for the biosynthesis of aphidicolin derivatives.
Epoxidation of methyl esters of resin acids with the pimarane skeleton with p-nitroperbenzoic acid has permitted the isolation of epoxides of the intracyclic double bond. Allylic diterpenic alcohols were obtained by acid-catalysed isomerisation of diterpene epoxides, and the action of Collins reagent on these allylic alcohols has been studied.