Oxidant-Mediated Nitrogenation and Recyclization of Imidazo[1,2-<i>a</i>
]pyridines with Sodium Azide: Synthesis of 4<i>H</i>
-Pyrido[1,2-<i>a</i>
][1,3,5]triazin-4-ones
作者:Gangjian Cao、Zhengkai Chen、Jinyu Song、Jianfeng Xu、Maozhong Miao、Hongjun Ren
DOI:10.1002/adsc.201701480
日期:2018.3.1
for the synthesis of 4H‐pyrido[1,2‐a][1,3,5]triazin‐4‐ones starting from readily available imidazo[1,2‐a]pyridines and sodium azide has been presented under aerobic oxidative conditions. The reaction proceeded well with the promotion of potassium persulfate/potassium permanganate with good functional group tolerance. A wide range of biologically valuable 4H‐pyrido[1,2‐a][1,3,5]triazin‐4‐one scaffolds
从容易获得的咪唑并[1,2- a ]吡啶和叠氮化钠开始合成4 H-吡啶并[1,2- a ] [1,3,5]三嗪-4-的快速简便的方法在有氧氧化条件下出现。反应进行得很好,促进了过硫酸钾/高锰酸钾的吸收,并且具有良好的官能团耐受性。通过这种方法组装了多种具有生物学价值的4 H-吡啶并[1,2- a ] [1,3,5]三嗪-4-1支架。也实现了克级反应。反应中可能涉及级联的硝化和氧化再循环序列。