The reaction of acidhydrazides with α-substituted carbonyl compounds in the presence of metal acetates gives substituted 1,2,4-triazines. These cyclisations could be effected without any added acetate by refluxing in dimethyl formamide, pyridine/acetic acid or dimethyl sulfoxide Sixty five 3,5,6-tri-3,6-di and 6 monosubstituted-1,2,4-triazines (in 50–90% yields) with a wide variation in the C3 substituent
酰
肼与α-取代的羰基化合物在
金属
乙酸盐的存在下反应,得到取代的
1,2,4-三嗪。这些环化反应可在二甲基甲酰胺,
吡啶/
乙酸或
二甲基亚砜中回流而无需添加
乙酸盐的情况下完成。65个3,5,6-tri-3,6-di和6个单取代的
1,2,4-三嗪据报道,其C 3取代基(烷基,芳基或杂基)和C 6取代基(芳基或杂基)的变化范围大,为50-90%。讨论了形成这些化合物所遵循的机理。