A. Aatif et al., 1-Mesityl-6-methyl-3a,4-propano-3a,4,5,6-tetrahydro[1,2,4]oxadiazolo[4,5-a][1,5]benzodiazepin-5-one, ACT CRYST C, 56, 2000, pp. E459-E460
Condensation of mesitonitrile oxide with 1,5-benzodiazepin-2-one leads to t
he title compound, C23H25N3O2. It has been established that 1,3-dipolar cyc
loaddition occurs on the C4=N5 double bond of the benzodiazepin-2-one.