Abstract 5-Ethoxymethylene-1,3-dioxane-4,6-dione reacts with isothiosemicarbazone to afford 5-isothiosemicarbazone methylene 1,3-dioxane-4,6-dione (3). Thermolysis of 3 supplies a novel synthetic method of 1-(N-alkylidene or benzylideneamino)-1,6-dihydro-2-methylthio-6-pyrimidine in good to high yield.
摘要 5-Ethoxymethylene-1,3-dioxane-4,6-dione 与isothiosemicarbazone 反
应得到5-isothiosemicarbazone 亚
甲基1,3-dioxane-4,6-dione (3)。3 的热解提供了一种新的 1-(N-亚烷基或亚
苄基氨基)-1,6-二
氢-
2-甲硫基-6-
嘧啶的合成方法,收率很高。