May-Jun 1989 Some Derivatives of Benz[/]azepine. Part III Robert A. James, Charlotte A. Kohn, Alun H. Rees* and Rex E. Verschuren Department of Chemistry, Trent University, Peterborough, Ontario K9J 7B8, Canada Received September 30, 1988 We report the synthesis by two routes, of hitherto unknown 3,4-epoxy-2,3,4,5-tetrahydrobenz[/]azepine-2,5- dione and hence a new route to 2,3,4,5-tetrahydrobenz[/]azepine-2,4,5-triones which are precursors ...