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research article

Synthesis of Fijiolide A via an Atropselective Paracyclophane Formation

Heinz, Christoph  
•
Cramer, Nicolai  
2015
Journal of the American Chemical Society

Fijiolide A is a secondary metabolite isolated from a marine-derived actinomycete and displays inhibitory activity against TNF-α-induced activation of NFκB, an important transcription factor and a potential target for the treatment of different cancers and inflammation related diseases. Fijiolide A is a glycosylated complex paracyclophane, which is structurally closely related to the Bergman-aromatization product of enediyne C-1027. We report an enantioselective synthesis offijiolide A demonstrating the power of fully intermolecular ruthenium-catalyzed [2 + 2 + 2] cyclotrimerizations with three different alkynes to assemble the heavily substituted central arene core. The characteristic strained [2.6]-paracyclophane structure is accessed by a templated atropselective macroetherification reaction.

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