The first catalytic asymmetric total synthesis of ent-hyperforin

Abstract

The first catalytic asymmetric total synthesis of ent-hyperforin was described here in detail. Keys to the success were a catalytic asymmetric Diels–Alder reaction, a stereoselective Clasien rearrangement, an intramolecular aldol cyclization, and a vinylogous Pummerer rearrangement. Along with the successful synthetic route, several attempted approaches toward the construction of bicyclo[3.3.1] core and the C2 oxidation were discussed.