AN EFFICIENT SYNTHESIS OF JOLKINOLIDE E INVOLVING THE BUTENOLIDE RING FORMATION BY INTRAMOLECULAR WITTIG REACTION
作者:Shigeo Katsumura、Sachihiko Isoe
DOI:10.1246/cl.1982.1689
日期:1982.10.5
A synthesis of jolkinolide E from the bicyclic enone 3 using intramolecularWittigreaction is described. In this synthesis a facile esterification method by means of a mixed anhydride of trichloroacetic acid catalyzed by DMAP, which culminates in the effective synthesis of the α,β,γ-trisubstituted butenolide ring, is also described.
The first synthesis of a marine natural product, (±)-6β-isovaleroxylabda-8,13-diene-7α,15-diol (1), has been accomplished starting from an octalone derivative 2.