Practical One-Pot Synthesis of 4,6-Bis(hetero)aryl- and 4-(Hetero) aryl-6-methyl-substituted 1,3,5-Triazin-2-amines
作者:Guilherme C. Paveglio、Gleison A. Casagrande、Lucas Pizzuti、Laís C. Calheiros、Sidnei Moura、Davi F. Back
DOI:10.1055/a-1970-8229
日期:2023.4
of 4,6-disubstituted 1,3,5-triazin-2-amines were prepared by cesium carbonate-promoted cotrimerization of aromatic nitriles with guanidine and the reaction of (hetero)aryl nitriles with N-acetylguanidine. The first series of 4,6-bis(hetero)aryl-1,3,5-triazin-2-amines was synthesized in yields of 56–85% by adapting a traditional approach that starts from readily available substrates but requires strong
两个系列的 4,6-二取代 1,3,5-三嗪-2-胺是通过碳酸铯促进的芳香腈与胍的共三聚反应以及 (杂) 芳基腈与N-乙酰胍的反应制备的。第一批 4,6-双(杂)芳基-1,3,5-三嗪-2-胺的合成产率为 56-85%,采用传统方法,该方法从现成的底物开始,但需要坚固且坚硬的底物- 处理基地以及存在严重的范围限制。在这一行中,此处开发的方法使用温和的碱基并克服了p的范围限制具有电子释放基团的取代苯甲腈。第二系列 4-(hetero)aryl-6-methyl-1,3,5-triazin-2-amines 包含不对称取代的对称三嗪,其合成产率为 58-75%。总之,这项工作强调了一种合成方法,它可以耐受广泛的底物,包括邻位和对位取代的苯甲腈以及杂芳腈。