Mild Metal-Free Sequential Dual Oxidative Amination of C(sp<sup>3</sup>)–H bonds: Efficient Synthesis of Imidazo[1,5-<i>a</i>]pyridines
作者:Yizhe Yan、Yonghui Zhang、Zhenggen Zha、Zhiyong Wang
DOI:10.1021/ol4008487
日期:2013.5.3
A metal-free sequential dual oxidative amination of C(sp3)–H bonds under ambient conditions was the first developed, affording imidazo[1,5-a]pyridines in good to excellent yields. The reaction was involved in two oxidative C–N couplings and one oxidative dehydrogenation process with six hydrogen atoms removed.
首次开发了在环境条件下无金属的C(sp 3)-H键的顺序双氧化胺化反应,可提供咪唑并[1,5- a ]吡啶,并具有良好或优异的收率。该反应涉及两个氧化C–N偶联和一个氧化脱氢过程,其中去除了六个氢原子。
Diiodine-Mediated Oxidative Reaction for the Construction of Imidazo[1,5-a]pyridines under Metal-Free Conditions
An efficient and general protocol has been developed for preparing imidazo[1,5-a]pyridines in moderate to excellent yields by an I2-mediated sequential dual oxidative C(sp3)–H amination of ethyl pyridin-2-ylacetates with benzylamines. The metal- and peroxide-free reaction involves oxidative dehydrogenation and two C–N couplings.