Copper-catalyzed consecutive reaction to construct quinazolin-4(3H)-ones and pyrido[2,3-d]pyrimidin-4(3H)-ones
作者:Ting Li、Minglu Chen、Lei Yang、Zhengxin Xiong、Yongwei Wang、Fei Li、Dongyin Chen
DOI:10.1016/j.tet.2015.12.059
日期:2016.2
and pyrido[2,3-d]pyrimidin-4(3H)-ones from easily available 2-halobenzamides (or 2-halonicotinamides), aldehydes, and sodium azide has been developed, which gave the corresponding target products in 50–95% yields for 29 examples. This remarkable consecutive process involved sequential copper-catalyzed SNAr, reduction, cyclization, and oxidation. Notably, this work would provide a novel synthetic strategy
从容易获得的2-卤代苯甲酰胺(或2-卤代烟酰胺)中高效,实用地铜催化连续合成喹唑啉-4(3 H)-酮和吡啶并[2,3 - d ]嘧啶-4(3 H)-酮,已开发出醛和叠氮化钠,从而使29个实例的相应目标产物收率达到50-95%。这个非同寻常的连续过程涉及连续的铜催化的S N Ar,还原,环化和氧化。值得注意的是,这项工作将为含有喹唑啉酮类骨架的生物活性分子提供一种新颖的合成策略。