Visible‐Light‐Promoted G‐C ₃ N ₄ ‐Catalyzed Regio‐ and Stereo‐Selective C(sp ² )─H Thiocyanation and Selenocyanation of Enamides

ABSTRACT A method for the regioselective and stereoselective thiocyanation and selenocyanation of acetamide‐derived enamides has been developed, utilizing visible light and a g‐C 3 N 4 catalyst under mild conditions free of metals and oxidants. This approach affords ( E )‐ β ‐thio(seleno)cyanoenamides in high yields (up to 90%) with relatively broad functional group compatibility and simple experimental procedures. The process offers an environmentally benign route for the introduction of thiocyano and selenocyano groups into enamides. Furthermore, the g‐C 3 N 4 catalyst can be recycled and reused at least seven times while maintaining its activity.