Reusable chitosan without any post-modification, with active –NH2 and –OH groups, was found to be a highly efficient and renewable heterogeneous catalyst for the rapid and convenient synthesis of 2-aminopyrimidine-5-carbonitrile derivatives from guanidines, aldehydes and cyanoketones, under mild reaction conditions at 85 °C in good yields. Undoubtedly this methodology gives a facile and straightforward pathway to construct 2-aminopyrimidine-5-carbonitrile derivatives in an eco-friendly fashion.
未经任何后修饰的可重复使用的
壳聚糖,因其含有活性-NH2和-OH基团,被发现是一种高效且可再生的非均相催化剂,能够在温和反应条件下(85°C)以良好产率快速便捷地合成2-
氨基嘧啶-5-腈衍
生物,所用原料为
胍、醛和
氰基酮。毫无疑问,这一方法为环保地构建2-
氨基嘧啶-5-腈衍
生物提供了一个简便直接的途径。