C. Crevisy et al., STUDIES ON THE FORMATION OF 14-MEMBERED MACROCYCLES BY INTRAMOLECULARMICHAEL ADDITION, Bulletin de la Societe chimique de France, 132(4), 1995, pp. 360-370
Intramolecular Michael addition of beta-ketoesters on enones 1, 2 and
3 with two conjugated unsaturations along the connecting chain led to
cyclic monomers and dimers. These reactions work best with a cis alken
e; they give poor yield of monomer with a trans alkene and no monomer
with an alkyne.