Synthesis of α-onoceradiene-like terpene dimers by intermolecular metathesis processes

New alpha-onoceradiene analogues having a terpene homodimer skeleton are accessible from Weinreb's amide 2 derived from commercial (R)(+)-sclareolide using an intermolecular metathesis reaction as the key step to build the linker joining both terpene moieties.