Ammonium iodide-mediated regioselective chalcogenation of chromones with diaryl disulfides and diselenides

Tao Guoab*a School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, Henan, Chinab School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, Henan, ChinaCONTACT Tao Guo taoguo@haut.edu.cn School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, Henan 450052, China.Supplemental data for this article can be accessed on the publisher’s website.ABSTRACTA metal-free method for the synthesis of 3-chalcogenyl-chromones/quinolones from chromones/quinolones and diorganyl dichalcogenides using ammonium iodide under air was developed. This approach allowed the preparation of a wide range of 3-selenyl- and 3-sulfenyl-chromones/quinolones in good to excellent yields.GRAPHICAL ABSTRACT