| abstract |
(57) [Problem] To provide a simple method for producing a bisbenzoxazinone compound. SOLUTION: In the production of the bisbenzoxazinone compound represented by the following formula (1), a neutral organic solvent having a boiling point of 120 ° C. or higher is used, and water is not used in the process; (B) reacting 2 to 10 mol of acetic anhydride with respect to 1 mol of the intermediate bisanthranilic acid as a dehydrating ring-closing agent without isolating the intermediate bisanthranilic acid represented by the formula (1). Production method. Embedded image |