Enantioselective total synthesis of the novel tricyclic sesquiterpene (−)-sulcatine G. Absolute configuration of the natural product

An enantioselective total synthesis of (−)-sulcatine G 4 from the readily available (+)-diquinane diol 6 has been accomplished. This leads to the establishment of the absolute configuration of the natural product (+)-sulcatine G as 1.