Influence of Lewis Acids on the [4 + 2] Cycloaddition of N,N′-Fumaroylbis[(2R)-bornane-10,2-sultam] to Cyclopentadiene and Application to Various Dienes

Article abstract of DOI:10.1002/hlca.19980810213

Among seventeen different Lewis acids, TiCl₄ was found to be the best catalyst for the [4 + 2] cycloaddition of cyclopentadiene to N,N′-fumaroylbis[(2R)-bornane-10,2-sultam] ((-)-1). Independently of the TiCl₄ molar concentration, al