| 摘要 |
PROBLEM TO BE SOLVED: To obtain a 6,7-dioxyquinazolone derivative production from a 4,5- dioxyanthranilic acid ester derivative in a high yield and to provide an industrially preferable method for 6,7-dioxyquinazolone derivative production. SOLUTION: This method for 6,7-dioxyquinazolone derivative production is characterized in that a 4,5-dioxyanthranilic acid ester derivative is reacted with formamide in the presence of an acid or a base catalyst.
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