Af. Barrero et al., AN EFFICIENT SYNTHESIS OF THE ANTIFUNGAL DILACTONE LL-Z1271-ALPHA ANDOF OTHER BIOLOGICALLY-ACTIVE COMPOUNDS, Tetrahedron letters, 36(29), 1995, pp. 5251-5254
The syntheses of the terpenoid antifungal LL-Z1271 alpha and other rel
ated compounds were achieved starting from the communic acids. The syn
thetic approach includes a mercuriation-demercuriation reaction of a g
amma,delta-unsaturated methyl ester in the presence of O-2, giving ris
e to a lactone ring.