Gold-catalyzed construction of two adjacent quaternary stereocenters via sequential C–H functionalization and aldol annulation
Herein, a novel and efficient gold-catalyzed intermolecular C(sp2)–H functionalization (Friedel–Crafts alkylation) and aldol annulation strategy is presented. This cascade process allows the synthesis of a series of indanol and tetrahydronaphthalenol derivatives with two adjacent quaternary stereocenters. The attractive reaction features are the use of readily available starting materials, good diastereoselectivity, good functional-group tolerance and mild reaction conditions. Furthermore, preliminary results indicate that this transformation is amenable to enantioselectivitive synthesis with further chiral ligand screening and design.