Abstract 2-Benzyl-1,4,5,6-tetrahydropyrimidines 1 (as ene-1,1-diamine N,C-tautomers) in diglyme reacted with ethyl benzoylacetate at 160 °C in an oil bath to give 1,2,3,4-tetrahydropyrido[1,2-a]pyrimidin-6-ones 3 and with dimethyl acetylenedicarboxylate in methanol at room temperature, leading to methyl 1,2,3,4-tetrahydropyrrolo[1,2-a]pyrimidin-7-ylideneacetates 5, respectively.
摘要 2-Benzyl-1,4,5,6-四氢
嘧啶 1(作为 ene-1,1-diamine N,C-互变异构体)在
二甘醇二
甲醚中与
苯甲酰乙酸乙酯在 160 °C 下在油浴中反应得到 1,2, 3,4-四氢
吡啶并[1,2-a]
嘧啶-6-ones 3 和
乙炔二
羧酸二甲酯在室温下的
甲醇中,产生甲基 1,2,3,4-
四氢吡咯并[1,2-a]
嘧啶-7 -ylideneacetates 5,分别。