Stereoselective synthesis of the enantiomer of the novel marine diterpene isoagatholactone, ent-13(16),14-spongiadien-12.alpha.-ol, and the parent hydrocarbon isocopalane from methyl isocopalate
作者:Domingos S. De Miranda、Gianfranco Brendolan、Paulo M. Imamura、Manuel Gonzalez Sierra、Anita J. Marsaioli、Edmundo A. Ruveda
DOI:10.1021/jo00337a006
日期:1981.11
Stereoselective total syntheses of (±)-isoagatholactone and (±)-12α-hydroxyspongia-13(16),14-diene, two marine sponge metabolites
作者:Tatsuhiko Nakano、María Isabel Hernández
DOI:10.1039/p19830000135
日期:——
The highly efficient, stereoselective syntheses of (±)-isoagatholactone (1a) and (±)-12α-hydroxyspongia-13(16),14-diene (3e), a fundamental skeleton of spongiadiol (3a) and its related furanoid diterpenes, are described. (±)-Labda-8(20),13-dien-15-oic acid (6), chosen as the starting material, was cyclised to the known tricyclic compound (2b), which after methylation was subjected to photo-oxygenation