... PREPARATION OF DI- AND TRIACYLIMINES AND THEIR USE IN THE SYNTHESIS OF NITROGEN HETEROCYCLES Michael E. Jung,* 1 Kozo Shishido, Lynn Light, and Leonard Davis Department of Chemistry, University of California Los Angeles, California 90024 Abstract: Reaction of aza-Wittig reagents with glyoxylates and keto malonates produces di- and tri acylimines which are moderately reactive dienophiles for Diels-Alder cycloaddition. ...