M. Toyota et al., PD2-PROMOTED CYCLIZATION IN TETRACYCLIC DITERPENE SYNTHESIS HIGHLY DIASTEREOSELECTIVE FORMAL TOTAL SYNTHESIS OF (+()-)-STEMODIN/, Tetrahedron letters, 34(37), 1993, pp. 5947-5950
Intramolecular Diels-Alder reaction of the triene 5 and Pd2+-promoted
cyclization reaction of the olefinic silyl enol ether of 10 have been
utilized as the key steps for a conceptually new, highly diastereocont
rolled formal total synthesis of (+/-)-stemodin (1).