The convergent total synthesis of brevenal, a non-toxic brevetoxin antagonist, has been achieved.The ABC ring segment and the E ring precursor were connected by the intramolecular allylation followed by ring-closing metathesis to furnish the pentacyclic e
A total synthesis of brevenal is described. The pentacyclic ether core was constructed by the intramolecular allylation of α-acetoxy ether and subsequent ring - closing metathesis. Both of the diene side chains were introduced by Wittig olefination and a