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

2017-10-16T13:40:54Z (GMT) by Tao Guo

A 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.