HCID 54004042, compound → HCID 53876049, compound

Participants

Reaction Steps

5,6-Dihydro-6-oxo-4H-imidazo[1,5-a][4,1]benzoxazepine-3-amidoxime (2 g, 8 mmole) in isobutyric anhydride (6 ml) was heated at 150° C. for 1.5 hours. The crude product in ethyl acetate:hexane (1:1) was chromatographed on silica and then crystallised from ethyl acetate:hexane to give the product (1.4 g, 58%), m.p. 143°-144° C.

Provenance & Evidence