Ga(III)-catalyzed cycloisomerization strategy for the synthesis of icetexane diterpenoids: Total synthesis of (±)-salviasperanol

Article abstract of DOI:10.1021/ol061037c

A general approach to the tricyclic core of the icetexane natural products via the cycloisomerization of alkynyl indenes using GaCl₃ is presented. This strategy provides an efficient synthesis of the natural product salviasperanol and sets the