Visible‐Light‐Promoted Willgerodt–Kindler‐Type Thioamidation Reaction of Amines, α‐Ketoacids, and Elemental Sulfur

A visible‐light‐promoted Willgerodt–Kindler‐type thioamidation reaction of amines, α ‐ketoacids, and elemental sulfur under mild conditions has been developed. A wide variety of readily available feedstocks are extensively investigated, including primary/secondary amines, aryl/alkyl amines, ammonium salts, amino‐containing pharmaceuticals, and amino acid esters, providing 27 examples of thioamides in moderate to high yields under metal‐free and oxidant‐free conditions.