Abstract
A green, efficient and simple protocol was developed for the synthesis of dihydropyrimido[4,5-d]pyrimidinetrione derivatives via a coupling reaction of 6-aminouracils, aromatic aldehydes and urea in aqueous media in the presence of nano-crystalline CuI at room temperature. The products were obtained in high yields. CuI nanoparticles can be recycled three times without significant loss of catalytic activity.
摘要
本文开发了一种绿色、高效和简单的合成二氢嘧啶[4,5-d]嘧啶三酮衍生物的方法,通过在室温下在水介质中存在纳米晶CuI的情况下,6-氨基尿嘧啶、芳香醛和尿素的偶联反应合成。产物收率高。CuI纳米颗粒可循环使用三次,催化活性损失不显著。