Monatshefte fur Chemie p. 565 - 572 (1984)
Update date:2022-08-05
Topics: Characterization Cyclization reaction Isolation and Purification
Davidson, John S.
When anthranilic acid hydrazide is reacted with 1,1'-carbonyldiimidazole in THF 5-(2-aminophenyl)-1,3,4-oxadiazole-2(3H)-one (4) is formed.It can also be prepared from 1-o-aminobenzoyl-4,4-dimethylsemicarbazide which eliminates methylamine when boiled with DMF.On heating the 5-(2-aminophenyl)-1,3,4-oxadiazole above its melting point it rearranges to 3-amino-2,4(1H,3H)-quinazolinedione (5). - Keywords: 3,4-Dihydro-1H-1,3,4-benzotriazepine-2,5-dione; Oxadiazoles
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