Wr. Roush et al., SYNTHESIS AND TRANSANNULAR DIELS-ALDER REACTIONS OF (E,E,E)-CYCLOTETRADECA-2,8,10-TRIENONES, Tetrahedron letters, 34(28), 1993, pp. 4427-4430
(EEE)-Cyclotetradeca-2,8,10-trienones 4 and 5, prepared by intramolecu
lar Horner-Wadsworth-Emmons reactions, undergo highly stereoselective
transannular Diels-Alder reactions to the trans-anti-cis tricyclic ket
ones 6 and 7, respectively.