FeCl3-catalyzed C-3 functionalization of imidazo[1,2-a]pyridines with diazoacetonitrile under oxidant- and ligand-free conditions
作者:Guang Chen、Bin Li、Bing Hu、Xinying Zhang、Xuesen Fan
DOI:10.1016/j.tetlet.2020.151774
日期:2020.4
A facile synthesis of 2-(imidazo[1,2-a]pyridin-3-yl)acetonitriles via FeCl3-catalyzed site-selective C(sp2)−H alkylation of imidazo[1,2-a]pyridines with diazoacetonitrile is presented. This new method features with an environmentally benign catalyst, easily obtainable substrates, and oxidant- and ligand-free reaction conditions. Moreover, the importance of the products thus obtained is showcased by
的2-(咪唑并[1,2一种简便合成一个]吡啶-3-基)乙腈经由的FeCl 3催化的位点选择性C(SP 2)-H咪唑并[1,2的烷基化一]吡啶与diazoacetonitrile被呈现。该新方法具有环境友好的催化剂,易于获得的底物以及无氧化剂和无配体的反应条件。此外,如此获得的产物的重要性通过它们以良好的效率容易地转化成一些合成的和药学上感兴趣的产物而得以展示。