General Diastereoselective Synthetic Approach toward Isospongian Diterpenes. Synthesis of (−)-Marginatafuran, (−)-Marginatone, and (−)-20-Acetoxymarginatone
作者:Antonio Gris、Nuria Cabedo、Ismael Navarro、Ignacio de Alfonso、Consuelo Agulló、Antonio Abad-Somovilla
DOI:10.1021/jo3008034
日期:2012.7.6
This work describes a synthetic approach to the carbocyclic skeleton of isospongian diterpenes that uses the commercially available monoterpene (S)-carvone as a C-ring synthon, which is incorporated into the tetracyclic isospongian framework via a C→ABC→ABCD ring annulation strategy using intramolecular Diels–Alder and ring-closing metathesis reactions. This approach has been successfully used to prepare