Atom-efficient synthesis of 2,4,6-trisubstituted 1,3,5-triazines <i>via</i> Fe-catalyzed cyclization of aldehydes with NH<sub>4</sub>I as the sole nitrogen source
作者:Jiang Xiao、Shuang Ren、Qiang Liu
DOI:10.1039/d0ra03323e
日期:——
An atom-efficient, straightforward method for the synthesis of 2,4,6-triaryl-1,3,5-triazines via iron-catalyzed cyclization of aldehydes with NH4I as the sole nitrogen source is demonstrated. This strategy works smoothly under air atmosphere, and affords symmetrical 2,4,6-trisubstituted and unsymmetrical 1,3,5-triazines with yields from 18% to 72%. Compared to other methods, the present protocol provides
展示了一种以 NH 4 I 作为唯一氮源的铁催化醛环化合成 2,4,6-三芳基-1,3,5-三嗪的原子效率、直接方法。该策略在空气气氛下工作顺利,得到对称的 2,4,6-三取代和不对称的 1,3,5-三嗪,产率从 18% 到 72%。与其他方法相比,本协议使用廉价、容易获得的铵盐作为唯一的氮源,为 2,4,6-三取代 1,3,5-三嗪提供了一种简单且原子效率高的方法。初步机理研究表明,N-亚苄基苯并脒酰胺参与了该环化反应。