Intermolecular and Intramolecular Diels-Alder Reactions: Platencin (Banwell), Platensimycin (Matsuo), (+)-Cassaine (Deslongchamps), (-)-Halenaquinone (Trauner)
José Barluenga of the Universidad de Oviedo described(Org. Lett. 2008, 10, 4469.DOI: 10.1021/ol801652h)a powerful route from lithiated arenes such as 1 to the benzocyclobutane 3, the immediate precursor to the…