Several 3‐amino‐4(3H)‐quinazolinones were prepared from o‐aminobenzoylhydrazines and triethyl orthoformate or from isatoic anhydrides, hydrazines and triethyl orthoformate. o‐Aminobenzoylhydrazine intermediates were obtained by reaction of isatoic anhydrides with hydrazines. Some of the aminoquinazolinones displayed anticonvulsant activity in mice.
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Kornet et al. (1983) studied this question.