An Intramolecular Diels−Alder Approach to the Eunicellins: Enantioselective Total Syntheses of Ophirin B and Astrogorgin
摘要:
The enantioselective syntheses of the eunicellins ophirin B and astrogorgin have been completed. Ring-closing metatheses provide efficient access to the oxonene rings, and highly diastereoselective intramolecular Diels-Alder reactions resulted in the formation of the hydrobenzofuran portion of the molecules.
An Intramolecular Diels−Alder Approach to the Eunicellins: Enantioselective Total Syntheses of Ophirin B and Astrogorgin
摘要:
The enantioselective syntheses of the eunicellins ophirin B and astrogorgin have been completed. Ring-closing metatheses provide efficient access to the oxonene rings, and highly diastereoselective intramolecular Diels-Alder reactions resulted in the formation of the hydrobenzofuran portion of the molecules.