A Unified Approach for the Enantioselective Synthesis of the Brominated Chamigrene Sesquiterpenes.
Alexander J BurckleVasil H VasilevNoah Z BurnsPublished in: Angewandte Chemie (International ed. in English) (2016)
The brominated chamigrene sesquiterpenes constitute a large subclass of bromocyclohexane-containing natural products, yet no general enantioselective strategy for the synthesis of these small molecules exists. Herein we report a general strategy for accessing this family of secondary metabolites, including the enantioselective synthesis of (-)-α- and (-)-ent-β-bromochamigrene, (-)-dactylone, and (+)-aplydactone. Access to these molecules is enabled by a stereospecific bromopolyene cyclization initiated by the solvolysis of an enantiomerically enriched vicinal bromochloride.
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