A new approach to the macrocyclic lactone zearalanone is described utilizin
g an alkenol and an arene trifluoromethanesulfonate as starting materials.
The key step is a Pd(0)-catalyzed cross-coupling of the arene trifluorometh
anesulfonate with a 9-alkyl-9-borabicyclo[3.3.1]nonane derived from the alk
enol. The title compound is obtained by macrolactonization of a hydroxy aci
d under Mitsunobu conditions.