Jr. Dawson et Jm. Mellor, NOVEL CHEMISTRY OF THE IMDA ADDUCTS OF THE AMIDES DERIVED FROM DICHLOROMALEIC ANHYDRIDE AND BETA-AMINOMETHYLSTYRENES, Tetrahedron letters, 36(49), 1995, pp. 9043-9046
Reaction of amides derived from dichloromaleic anhydride and beta-amin
omethylstyrenes affords unstable Diels Alder adducts, which give via c
ompeting processes a number of products including pyrrolidinones by a
novel sequence of dehydrochlorination and subsequent ring-opening of a
cyclohexadiene.