Abstract
AbstractA bioinspired Lewis acid‐catalyzed epoxypolyene cyclization was developed to construct the tetracyclic framework containing a bicyclo[3.3.1]nonane core and seven chiral centers. The usage of this approach for assembling these natural products of 6/6/6/6 tetracyclic skeleton with bicyclo[3.3.1]nonane core is demonstrated by the total synthesis of highly oxidized berkeleyone A and preaustinoid A.
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