化学合成。
医药; 农药; 染料
合成路线 1（1. 合成：4956-05-2）
产率：93%
合成条件：at 60℃; for 10 h;
实验步骤：1）6-溴-2H-f 1,2,41tri azi ne-3,5-d i one（2i）; 将2H- [1,2,4]三嗪-3,5-二酮（50g，442mmol）置于60ml溴的800ml水中，在60℃下保持10小时。 然后将反应介质缓慢加到氨水溶液中直至pH = 5.然后用乙酸乙酯萃取，有机相用MgSO 4干燥。 过滤并浓缩至干后，分离出白色固体形式的2i（79.2g，产率= 93％）。 TLC Merck硅胶60F 254，CH 2 Cl 2 -MeOH：90-10，Rf = 0.32。
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