Marine dolabellane diterpenoid stolonidiol was synthesized from l-ascorbic acid. The method for this totalsynthesis involves formation of the bicyclo[2.2.1]heptane derivative using a diastereoselective sequential Michael reaction, formation of cyclopentane derivative by the retro-aldol reaction and construction of an 11-membered carbocyclic ring through the intramolecular Horner–Wadsworth–Emmons reaction
Marine dolabellane diterpenoid claenone (1) was synthesized from D-mannitol. This synthesis involves the formation of bicyclo[2.2.1]heptane derivative 4a by sequential Michael reaction, the formation of cyclopentane derivative 9 by retro-aldol reaction and the cyclization of sulfone 19.
An efficient method was established for the synthesis of the optically active bicyclo[4.2.1]nonane segment of mediterraneols using diastereoselective sequential Michael reaction and then retro-aldol reaction.