111. Asymmetric intramolecular Diels-Alder reactions of N-acyl-camphor-sultam trienes.
     Oppolzer, W.; Dupuis, D.
     Tetrahedron Lett. 1985, 26, 5437-5440

Treatment of triene-imides 4 with EtAlCl₂ at −20° gave crystalline cycloadducts 5 which furnished enantiomerically pure bicyclic alcohols 9 with regeneration of the chiral auxiliary.

DOI : 10.1016/S0040-4039(00)98228-5