在这项工作中,通过2-羟基-1,4-萘醌或2的迈克尔加成反应合成了功能化的嘧啶-2,4-二酮-,苯并[ g ]-和二氢吡喃并[2,3- g ]色烯衍生物。在催化量的1-脯氨酸存在下,在水中回流条件下,将醛,5-二羟基-1,4-苯醌与醛与梅德鲁姆的酸,二甲酮或巴比妥酸形成Knoevenagel缩合产物,收率良好。
“On-water” organic synthesis: l-proline catalyzed synthesis of pyrimidine-2,4-dione-, benzo[g]- and dihydropyrano[2,3-g]chromene derivatives in aqueous media
In this work, functionalized pyrimidine-2,4-dione-, benzo[g]-, and dihydropyrano[2,3-g]chromene derivatives have been synthesized via a Michael addition of 2-hydroxy-1,4-naphthoquinone or 2,5-dihydroxy-1,4-benzoquinone to the Knoevenagel condensation product of an aldehyde with Meldrum’s acid, dimedone or barbituric acid in the presence of a catalytic amount of l-proline under refluxing conditions
在这项工作中,通过2-羟基-1,4-萘醌或2的迈克尔加成反应合成了功能化的嘧啶-2,4-二酮-,苯并[ g ]-和二氢吡喃并[2,3- g ]色烯衍生物。在催化量的1-脯氨酸存在下,在水中回流条件下,将醛,5-二羟基-1,4-苯醌与醛与梅德鲁姆的酸,二甲酮或巴比妥酸形成Knoevenagel缩合产物,收率良好。