54. A Total Synthesis of α-Kainic Acid by an Intramolecular Ene Reaction. Preliminary communication
    Oppolzer, W.; Andres, H.
    Helv. Chim. Acta 1979, 62, 2282-2284

The neurotoxin α-kainic acid (7) was synthesized from 1via the thermal key step 5 → 6 in 41% overall yield.

DOI : 10.1002/hlca.19790620724