Three-component synthesis of 5:6 and 6:6 fused pyrimidines using KF–alumina as a catalyst
作者:Pushpak Mizar、Bekington Myrboh
DOI:10.1016/j.tetlet.2008.06.087
日期:2008.9
fused pyrimidine derivatives were synthesized by the three-component reaction of an aryl aldehyde, urea, or guanidine in ethyl alcohol/dioxane in presence of 1-methyl-1H-pyrrol-2(3H)-one 1, 1-methylpiperidin-2-one 2, 1-methylindolin-2-one 3, or 1,3-dimethyl-dihydropyrimidine-2,4-dione 9 at 80 °C catalyzed by KF–Al2O3. For example, when 1-methyl-1H-pyrrol-2(3H)-one 1, arylaldehyde 4, and urea 5 were
一系列稠合嘧啶衍生物的是由芳醛,脲或胍在乙醇/中的1-甲基- 1二恶烷存在下的三组分反应合成ħ吡咯-2-(3 ħ) -酮1,1甲基哌啶-2-酮2,1-甲基二氢-2-酮3,或1,3-二甲基二氢嘧啶-2,4-二酮9在80℃下催化的KF-Al系2 ö 3。例如,当用KF–Al 2 O 3处理1-甲基-1 H-吡咯-2(3 H)-one 1,芳醛4和尿素5时在80°C的乙醇中浸泡3到5小时,我们以良好的收率获得了吡咯并[2,3- d ]嘧啶衍生物。