Ej. Warawa et C. Ceccarelli, A FACILE ENTRY TO 5-DIHYDRO[1,4]OXAZEPINO[5,4-A]ISOINDOLE-2,7-DIONES, Journal of heterocyclic chemistry, 35(1), 1998, pp. 33-37
The titled compounds were prepared by reacting N-(2-bromoethyl)phthali
mide with enolates of phenylacetic acid esters. 2,3-Dihydrooxazolo[2,3
-a]isoindolones are believed to be intermediates in the process. An X-
ray crystallographic analysis was conducted on one of the compounds.