A chiron approach to (1R,2R,5S,7S)-2-hydroxy-exo-brevicomin: a component of the volatiles produced by the male mountain pine beetle, Dendroctonus ponderosae
A chiron approach for the synthesis of (1R,2R,5S,7S)-2-hydroxy-exo-brevicomin 1, a component of the volatiles obtained from male mountainpinebeetles, Dendroctonusponderosae has been achieved. Our synthesis started with commercially available d-ribose and involves a Wittig olefination, an acid catalyzed one pot hydrogenation and the internal acetalization as key steps.
An efficient and mild intramolecular oxidative nucleophilic cyclisation protocol has been developed for the conversion of γ, δ-olefinic alcohols into the hemiketals, which in turn on deoxygenation led to the very important C-glycoside class of compounds.