Ak. Mukerjee et al., REACTION OF METHYLPHTHALIMIDOKETENE WITH BENZYLIDENEANILINES AND CINNAMYLIDENEANILINES - STRUCTURE AND CONFIGURATION OF THE PRODUCTS, Canadian journal of chemistry, 73(4), 1995, pp. 614-617
Methylphthalimidoketene reacts with cinnamylideneanilines to give tetr
ahydrooxazin-6-ones exclusively, whereas with benzylideneaniline it al
so forms beta-lactam. Configurations are based on X-ray studies.