Abstract

A synthetic study on the construction of the tetracyclic core structure of dysiherbols A-C is presented herein. In this synthesis, intramolecular [2 + 2] cycloaddition introduces a fused 6/4 ring system, followed by a Pd-catalyzed semipinacol rearrangement/Csp2-H arylation cascade to construct the ring C, and visible-light-mediated ring-opening of cyclopropyl silyl ether installs the tetracyclic core of dysiherbols.

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