| Isomerization of 4-Amino-6-tert-butyl-3-methylthio-1,2,4-triazin-5(4H)-one with Base |
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| 作者姓名： | Hong Chao GUO Shang Zhong LIU Xue Tai HOU Min WANG* |
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| 作者单位： | Hong Chao GUO，Shang Zhong LIU，Xue Tai HOU，Min WANG* Department of Applied Chemistry，China Agricultural University，Beijing 100094 |
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| 摘 要： | 4-Amino-6-tert-butyl-3-methylthio-1, 2, 4-triazin-5 (4H)-one I, named as Metribuzin1, is an excellent selective herbicide. In the course of studying the reaction of I, we have found an unexpected reaction. We have attempted to prepare 6-tert-butyl- 4-methylamino-3-methylthio-1, 2, 4-triazin-5 (4H)-one II from I with methyl iodide in the presence of sodium hydroxide in aqueous methanol, surprisingly, instead of II the product III 4-amino-6-tert-butyl-3, 4-dihydro-2-methyl-3-thioxo-1, 2, 4-…
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