苯嗪草酮,化学名为4-氨基-3-甲基-6-苯基-1,2,4-三嗪-5(4H)-酮,是1975年德国Bayer公司开发的低毒除草剂新品种,可防除单、双子叶杂草,是一种应用于防除甜菜田禾本科和阔叶杂草的除草剂,主要用于旱地作物,是目前具有规模的高效、安全除草剂。在国外苯嗪草酮已是一个大吨位的农药品种,在国内有着较好的市场前景,但国内未见其工业化生产工艺的报道。目前,文献报道的苯嗪草酮的合成均采用关键 Methoxamine, a chemical name of 4-amino-3-methyl-6-phenyl-1,2,4-triazin-5 (4H) -one, was developed in 1975 by Bayer company of low toxicity herbicides The new variety, which can control single and dicotyledonous weeds, is a herbicide used in the control of beet and broadleaf weeds in sugar beet fields. It is mainly used in dryland crops and is currently a scale-efficient and safe herbicide. In abroad, metronidazole is a large tonnage of pesticide varieties, and has a good market prospect in China. However, there is no report of its industrialized production process in China. At present, the reported synthesis of trimethoprim use the key