Synthesis of Heterocyclic Compounds Using Amidines as Their Ene-1,1-diamine Tautomers, IV: Synthesis of <i>N</i>-Bridged Heterocycles 1,2,3,4-Tetrahydropyrido[1,2<i>-a</i>]pyrimidin-6-ones and Methyl 1,2,3,4-Tetrahydropyrrolo[1,2-<i>a</i>]pyrimidin-7-ylideneacetates
作者:Shogo Ihara、Takashi Soma、Daigo Yano、Shunichi Aikawa、Yasuhiko Yoshida
DOI:10.1080/00397911.2010.517365
日期:2011.12.15
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。