I<sub>2</sub>
/K<sub>2</sub>
S<sub>2</sub>
O<sub>8</sub>
Mediated Direct Oxidative Annulation of Alkylazaarenes with Amidines for the Synthesis of Substituted 1,3,5-Triazines
作者:Jun Zhang、Tingting Zheng、Jidong Zhang
DOI:10.1002/ejoc.201901737
日期:2020.2.21
A simple and direct approach to 1,3,5‐triazines based biheteroaryls from methyl‐azaarenes and amidines has been developed, providing the target products with up to 92 % yield. The transformation is achieved through I2/K2S2O8 catalyzed in‐situ aldehyde generation of methyl‐azaarenes and cascade amination–cyclization.
已开发出一种简单直接的方法,可从甲基氮杂芳烃和am中提取基于1,3,5-三嗪的双杂芳基,可为目标产品提供高达92%的收率。该转化是通过I 2 / K 2 S 2 O 8催化甲基氮杂芳烃的原位醛生成和级联胺化环化而实现的。
An efficient ruthenium-catalyzed dehydrogenative synthesis of 2,4,6-triaryl-1,3,5-triazines from aryl methanols and amidines
By using [RuCl2(p-Cymene)]2/Cs2CO3 as an efficient catalyst system, the readily available, inexpensive aryl methanols were firstly employed for dehydrogenative synthesis of aryl substituted 1,3,5-triazine derivatives. Due to the inherent stability of alcohols in contrast with aldehydes, our synthetic protocol is adaptable to a broad substrate scope, there is no need for stringent protection during
通过使用[RuCl 2(对-Cymene)] 2 / Cs 2 CO 3作为有效的催化剂体系,首先将容易获得的廉价芳基甲醇用于芳基取代的1,3,5-三嗪衍生物的脱氢合成。由于醇与醛相比具有固有的稳定性,因此我们的合成方案适用于广泛的底物范围,在整个操作过程中都不需要严格的保护,并且有可能制备目前难以获得或无法获得的有价值的产品使用常规方法进行准备具有挑战性。这是对常规合成方法的重要补充。